CN117386371B - Side wall coal tunneling device with temporary support function and using method thereof - Google Patents
Side wall coal tunneling device with temporary support function and using method thereof Download PDFInfo
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- CN117386371B CN117386371B CN202311667949.2A CN202311667949A CN117386371B CN 117386371 B CN117386371 B CN 117386371B CN 202311667949 A CN202311667949 A CN 202311667949A CN 117386371 B CN117386371 B CN 117386371B
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- 239000003245 coal Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims description 13
- 230000005641 tunneling Effects 0.000 title abstract description 34
- 238000005520 cutting process Methods 0.000 claims abstract description 277
- 238000005507 spraying Methods 0.000 claims abstract description 110
- 239000011435 rock Substances 0.000 claims abstract description 101
- 238000005065 mining Methods 0.000 claims abstract description 98
- 239000002002 slurry Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 238000004519 manufacturing process Methods 0.000 claims description 31
- 239000007921 spray Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 26
- 239000010410 layer Substances 0.000 description 14
- 239000011378 shotcrete Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 238000005406 washing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
- E21C47/02—Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a side coal tunneling device with a temporary support function, which relates to the technical field of open-pit side coal mining and comprises a vehicle body, a first cutting part, a second cutting part, a first support component and a second support component, wherein the first cutting part and the second cutting part are sequentially arranged in front of the vehicle body along a first direction and are staggered in the extending direction of the vehicle body, the first cutting part and the second cutting part can move up and down relative to the vehicle body, at least part of the first cutting part and at least part of the second cutting part can rotate around the first direction relative to the vehicle body, at least part of the first support component is arranged on the first cutting part and is used for spraying slurry on the surface of a mining cave, and at least part of the second support component is arranged on the second cutting part and is used for spraying slurry on the surface of the mining cave. The side wall coal tunneling device with the temporary support function has the advantages of effectively increasing the width of a coal mining cave, and improving the stability of surrounding rock of the coal mining cave and the safety of side wall coal mining.
Description
Technical Field
The invention relates to the technical field of open-pit mine side wall coal exploitation, in particular to a side wall coal tunneling device with a temporary support function and a use method thereof.
Background
The side wall coal pressing is called side wall coal for short, and refers to the fact that an uncollected part is pressed and covered by the mining technology of an open pit coal mine in the production process. A large amount of side wall coal is buried permanently by the inner dumping site, which causes huge resource waste. At present, a remote control mode is often adopted to control a continuous miner to cut into coal to form a mining cave, and coal is transported out by a transportation system at the rear part of the continuous miner, so that not only can the waste of coal resources be reduced, but also staff can be prevented from entering the mining cave, and the life safety of the staff is ensured.
In the related art, the continuous miner does not support the top plate and the two sides of the mining cave in the coal mining process, and only depends on the self-stabilization capability of surrounding rock to maintain stability. However, when the surrounding rock is locally broken or has discontinuous structures such as remarkable fracture and cracks, the roof and the upper part can possibly fall off rock, so that mining equipment in the mining cave is easily damaged, even the equipment is 'pressed down' in the mining cave, smooth withdrawal cannot be realized, and damage or loss of large-scale equipment is caused. In addition, the stability of the mining cave is maintained only by means of the self-stability capability of the surrounding rock, so that the side wall coal mining technology can only be applied to mining conditions with high surrounding rock strength and complete rock mass, and the application and popularization range of the side wall coal mining technology is limited.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides the side wall coal tunneling device with the temporary support function and the use method thereof, and the device not only can effectively increase the width of a coal mining cave, but also can improve the stability of surrounding rock of the coal mining cave and the safety of side wall coal mining, widens the application range of side wall coal mining, and is beneficial to the popularization and application of technology.
The embodiment of the invention provides a side wall coal tunneling device with a temporary support function, which comprises the following steps:
the device comprises a vehicle body, a first cutting part and a second cutting part, wherein the first cutting part and the second cutting part are sequentially arranged in front of the vehicle body along a first direction and extend along the extending direction of the vehicle body, the first cutting part and the second cutting part are staggered in the extending direction of the vehicle body, the first cutting part and the second cutting part can swing along the up-down direction relative to the vehicle body, at least part of the first cutting part and at least part of the second cutting part can rotate around the first direction relative to the vehicle body, an included angle is formed between the up-down direction and the first direction, and the first cutting part and the second cutting part are used for cutting surrounding rock;
the first supporting component is at least partially arranged on the first cutting part and is used for spraying slurry on the surface of a mining cave formed by cutting surrounding rock by the first cutting part and forming a first supporting layer;
the second supporting component is at least partially arranged on the second cutting part and is used for spraying slurry on the surface of a mining cave formed by cutting surrounding rocks by the second cutting part and forming a second supporting layer.
Further, the dimension of the first cutting portion in the vehicle body extending direction is longer than the dimension of the second cutting portion in the vehicle body extending direction.
Further, the first cutting part comprises a first rocker arm and a first cutting roller, one end of the first rocker arm is connected with the vehicle body, the other end of the first rocker arm is connected with the first cutting roller, the other end of the first rocker arm can swing in the up-down direction relative to the vehicle body, the first cutting roller can rotate around the first direction relative to the other end of the first rocker arm,
the first supporting component comprises a first spraying part and a first control part, the first spraying part is arranged at the other end of the first rocker arm, and the first control part is connected with the first spraying part so as to control the first spraying part to spray slurry to the surface of a mining cave formed by cutting surrounding rock by the first cutting part.
Further, the second cutting part comprises a second rocker arm and a second cutting roller, the second rocker arm and the first rocker arm are sequentially arranged along the first direction, one end of the second rocker arm is connected with the vehicle body, the other end of the second rocker arm is connected with the second cutting roller, the other end of the second rocker arm can swing in the up-down direction relative to the vehicle body, the other end of the second cutting roller relative to the second rocker arm can rotate around the first direction,
the second supporting component comprises a second spraying part and a second control part, the second spraying part is arranged at the other end of the second rocker arm, and the second control part is connected with the second spraying part so as to control the second spraying part to spray slurry to the surface of a mining cave formed by cutting surrounding rocks by the second cutting part.
Further, the first spraying piece comprises a plurality of first top nozzles and a plurality of first side nozzles, the first top nozzles are arranged on the top surface of the first rocker arm at intervals along the first direction, and the first side nozzles are arranged on the side surface, away from the second rocker arm, of the first rocker arm at intervals along the up-down direction.
Further, the second spraying piece comprises a plurality of second top nozzles and a plurality of second side nozzles, the second top nozzles are arranged on the top surface of the second rocker arm at intervals along the first direction, and the second side nozzles are arranged on the side surface, away from the first rocker arm, of the second rocker arm at intervals along the up-down direction.
Further, the highwall coal tunneling device with temporary support function further comprises:
the feed box is arranged on the vehicle body and is suitable for storing guniting materials;
the guniting pump is provided with a feeding hole and a discharging hole, the guniting pump is communicated with the feed box through the feeding hole, so that guniting materials can enter the guniting pump, the discharging hole is communicated with the first control piece and the second control piece, so that guniting materials in the guniting pump can pass through the first control piece and the second control piece to enter the first spray piece and the second spray piece respectively.
Further, the highwall coal tunneling device with temporary support function further comprises:
the water tank is arranged on the vehicle body;
the clean water pump is provided with a water inlet and a water outlet, the clean water pump is communicated with the water tank through the water inlet, the water outlet is communicated with the first control piece and the second control piece, so that water in the water tank can enter the first spraying piece and the second spraying piece through the first control piece and the second control piece respectively, and the first spraying piece and the second spraying piece are cleaned.
Further, the highwall coal tunneling device with temporary support function further comprises:
the first cutting part, the second cutting part and the third cutting part are sequentially arranged in front of the vehicle body along the first direction and extend along the extending direction of the vehicle body, the first cutting part, the second cutting part and the third cutting part are staggered in the extending direction of the vehicle body, the third cutting part can move in the up-down direction relative to the vehicle body, at least part of the third cutting part can rotate around the first direction relative to the vehicle body, and the third cutting part is used for cutting surrounding rocks;
and the third supporting component is at least partially arranged on the third cutting part and is used for spraying slurry on the surface of a mining cave formed by cutting the surrounding rock by the third cutting part and forming a third supporting layer.
The application method of the highwall coal tunneling device with the temporary support function provided by the embodiment of the invention comprises the following steps:
s1, cutting surrounding rock by a first cutting part, spraying slurry to the top surface of a mining cave formed by cutting the surrounding rock by a first spraying part, cutting the surrounding rock by a second cutting part, and spraying slurry to the top surface of the mining cave formed by cutting the surrounding rock by a second spraying part;
s2, the first cutting part moves downwards and cuts surrounding rock, the first spraying part sprays slurry to the side surface of a mining cave formed by cutting the surrounding rock by the first cutting part, the second cutting part moves downwards and cuts the surrounding rock, and the second spraying part sprays slurry to the side surface of the mining cave formed by cutting the surrounding rock by the second cutting part;
s3, the first cutting part ascends from the bottom of the mining cave to the top of the mining cave and cuts surrounding rock, and the second cutting part ascends from the bottom of the mining cave to the top of the mining cave and cuts the surrounding rock;
s4, repeating the steps S1-S3.
The beneficial effects of this application are:
1. according to the highwall coal tunneling device with the temporary support function, disclosed by the embodiment of the invention, the first cutting part and the second cutting part are used for cutting, so that the complete mining cave section can be formed by cutting step by step through the same device, after the first cutting part cuts the surrounding rock, the first support component can timely perform slurry spraying support on the surface of the mining cave, and after the second cutting part cuts the surrounding rock, the second support component can timely perform slurry spraying support on the surface of the mining cave, therefore, the width of the mining cave can be effectively increased, the stability of the mining cave surrounding rock and the safety of highwall coal mining are improved, the application range of highwall coal mining is widened, and the popularization and the application of the technology are facilitated.
2. According to the method for using the side wall coal tunneling device with the temporary support function, the surrounding rock is cut through the first cutting part and the second cutting part, the top surface of the coal mining cave is timely supported through the first spraying part and the second spraying part, the first cutting part and the second cutting part move downwards and cut the surrounding rock, and meanwhile, the side surface of the coal mining cave is timely supported through the first spraying part and the second spraying part, so that the spraying operation and the cutting operation are completed synchronously, the mining speed and the efficiency of the side wall coal are not affected, the stability of the surrounding rock is improved, the application range of the side wall coal mining is widened, and the width of the coal mining cave is increased.
Drawings
FIG. 1 is a schematic diagram of a highwall coal tunnelling device with temporary support according to an embodiment of the invention.
Fig. 2 is an enlarged schematic view of the portion a in fig. 1.
FIG. 3 is a schematic diagram of the shotcrete of the top surface of the production chamber during the tunneling of the highwall coal tunneling device with temporary support function according to the embodiment of the invention.
FIG. 4 is a schematic diagram of a side-spraying coal mining tunnel when a highwall coal tunnelling device with temporary support function according to an embodiment of the invention.
Reference numerals: 1. a vehicle body; 2. a first cutting portion; 21. a first rocker arm; 22. a first cutting drum; 3. a second cutting portion; 31. a second rocker arm; 32. a second cutting drum; 4. a first support assembly; 41. a first spray member; 411. a first top nozzle; 412. a first upper nozzle; 42. a first control member; 43. a first connection pipe; 44. a second connection pipe; 45. a first protective layer; 46. a first upper temporary support layer; 5. a second support assembly; 51. a second spray member; 511. a second top nozzle; 512. a second upper nozzle; 52. a second control member; 53. a third connection pipe; 54. a fourth connection pipe; 55. a second upper temporary support layer; 61. a first bin, 62, a second bin; 7. a guniting pump; 71. a feed inlet; 72. a discharge port; 8. a pipeline; 9. a water tank; 10. a clean water pump; 101. a water inlet; 102. a water outlet; 20. and (5) mining the cave.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 4, the highwall coal tunneling device with temporary support function according to the embodiment of the invention includes a vehicle body 1, a first cutting part 2, a second cutting part 3, a first support assembly 4 and a second support assembly 5. Specifically, the vehicle body 1 extends in the second direction (as shown in fig. 1), and the first cutting portion 2 and the second cutting portion 3 are provided in the first direction (as shown in fig. 1) in order in front of the vehicle body 1, and each extend in the extending direction (as shown in fig. 1) of the vehicle body 1. The first cutting part 2 and the second cutting part 3 can swing along the up-down direction relative to the vehicle body 1, at least part of the first cutting part 2 and at least part of the second cutting part 3 can rotate around the first direction relative to the vehicle body 1, an included angle is formed between the up-down direction and the first direction, and the first cutting part 2 and the second cutting part 3 are used for cutting surrounding rock. Specifically, the first direction, the second direction, and the up-down direction are orthogonal to each other.
At least part of the first support assembly 4 is arranged on the first cutting part 2 and is used for spraying slurry on the surface of the production chamber 20 formed by cutting the surrounding rock of the first cutting part 2 and forming a first support layer 45. Specifically, after the first cutting part 2 cuts the surrounding rock, the first supporting component 4 timely sprays slurry on the surface of the mining cave 20 so as to support the surrounding rock.
At least part of the second support assembly 5 is disposed on the second cutting portion 3 and is used to slurry the surface of the production chamber 20 formed by cutting the surrounding rock of the second cutting portion 3 and form a second support layer (not shown). Specifically, after the second cutting part 3 cuts the surrounding rock, the second supporting component 5 timely sprays slurry on the surface of the mining cave 20 so as to support the surrounding rock.
According to the side coal tunneling device with the temporary support function, the first cutting part 2 and the second cutting part 3 are sequentially arranged along the first direction, so that surrounding rock can be cut step by step when the first cutting part 2 and the second cutting part 3 cut, the whole section of the coal mining chamber 20 can be formed by step cutting through the same device, after the first cutting part 2 cuts the surrounding rock, the first support component 4 timely performs slurry spraying support on the surface of the coal mining chamber 20, and after the second cutting part 3 cuts the surrounding rock, the second support component 5 timely performs slurry spraying support on the surface of the coal mining chamber 20, therefore, not only can the width of the coal mining chamber 20 be effectively increased, but also the stability of the surrounding rock of the coal mining chamber 20 and the safety of the side coal mining are improved, the use range of the side coal mining is widened, and the popularization and application of the side coal mining are facilitated.
Further, for soft rock with smaller surrounding rock self-stabilizing capacity, the self-stabilizing span of the mining cave 20 is smaller, the width of the tunneling device is required, and the safety of the tunneling device during tunneling can be ensured only by enabling the width of the tunneling device to be smaller than the self-stabilizing span. According to the side wall coal tunneling device with the temporary support function, in the tunneling process, the surrounding rock is timely subjected to guniting support, so that the requirement of the surrounding rock on the tunneling device can be reduced, the difficult problem that the tunneling device needs to be manufactured into a smaller width is avoided, the tunneling device can enter and exit once to form a mining cave 20 exceeding the self-stable span of the surrounding rock, the tunneling device is prevented from entering and exiting the mining cave 20 for multiple times, and the mining efficiency and the mining rate are improved.
Further, the size of the first cutting portion 2 in the extending direction of the vehicle body 1 is longer than the size of the second cutting portion 3 in the extending direction of the vehicle body 1.
Specifically, the size of the first cutting portion 2 in the second direction is longer than the size of the second cutting portion 3 in the second direction, so that when the first cutting portion 2 and the second cutting portion 3 cut the surrounding rock, the surrounding rock cut by the first cutting portion 2 advances in the second direction from the surrounding rock cut by the second cutting portion 3, thereby forming a time difference between the advanced cutting and the delayed cutting. After the first cutting part 2 cuts the surrounding rock, the first supporting component 4 timely supports the undelivered mining tunnel 20 formed in advance, so that the width of the mining tunnel 20 can be effectively increased.
Further, the first cutting portion 2 includes a first rocker arm 21 and a first cutting drum 22, one end of the first rocker arm 21 is connected to the vehicle body 1, the other end of the first rocker arm 21 is connected to the first cutting drum 22, and the other end of the first rocker arm 21 is swingable in the up-down direction with respect to the vehicle body 1, and the other end of the first cutting drum 22 with respect to the first rocker arm 21 is rotatable about the first direction so that the first cutting drum 22 can cut the surrounding rock in the up-down direction.
The first supporting component 4 comprises a first spraying piece 41 and a first control piece 42, the first spraying piece 41 is arranged at the other end of the first rocker arm 21, and the first control piece 42 is connected with the first spraying piece 41 to control the first spraying piece 41 to spray slurry to the surface of the production chamber 20 formed by cutting surrounding rocks by the first cutting part 2. Specifically, the first control member 42 is a solenoid valve control box.
Specifically, the first spraying piece 41 is arranged on the top surface of the other end of the first rocker arm 21, when the first cutting roller 22 cuts the surrounding rock, the first control piece 42 controls the first spraying piece 41 to timely spray slurry to the surface of the mining cave 20 so as to quickly seal surrounding rock cracks, shorten the exposure time of the surrounding rock, form a temporary supporting layer with certain strength after the slurry is solidified on the surface of the surrounding rock, prevent the inoculation and development of the surrounding rock cracks, prevent part of surrounding rock blocks from falling to damage the side wall coal mining equipment, change the current situation that the stability of the mining cave 20 is kept by simply relying on the self-stabilizing capability of the surrounding rock in the current side wall coal mining technology, and improve the stability of the surrounding rock of the mining cave 20 and the safety of the side wall coal mining.
Further, the second cutting portion 3 includes a second rocker arm 31 and a second cutting drum 32, the second rocker arm 31 and the first rocker arm 21 are sequentially arranged in the first direction, one end of the second rocker arm 31 is connected to the vehicle body 1, the other end of the second rocker arm 31 is connected to the second cutting drum 32, and the other end of the second rocker arm 31 is swingable in the up-down direction with respect to the vehicle body 1, and the second cutting drum 32 is rotatable in the first direction with respect to the other end of the second rocker arm 31, so that the second cutting drum 32 can cut the surrounding rock in the up-down direction as well. The second rocker arm 31 has a smaller dimension in the second direction than the first rocker arm 21, so that the second cutting drum 32 lags behind the first cutting drum 22 when cutting the surrounding rock.
Further, the dimension of the first cutting drum 22 in the first direction is longer than the dimension of the second cutting drum 32 in the first direction, and one end of the first cutting drum 22 adjacent to the second cutting drum 32 protrudes toward the second cutting drum 32, so that the first cutting drum 22 can cut the surrounding rock between the first cutting drum and the second cutting drum 32 when cutting the surrounding rock, the uncleaved coal is avoided, the resistance to the second cutting drum 32 when cutting the surrounding rock can be reduced, and the mining efficiency is improved.
The second supporting component 5 comprises a second spraying piece 51 and a second control piece 52, the second spraying piece 51 is arranged at the other end of the second rocker arm 31, and the second control piece 52 is connected with the second spraying piece 51 so as to control the second spraying piece 51 to spray slurry to the surface of the production chamber 20 formed by cutting surrounding rocks by the second cutting part 3. Specifically, the second control member 52 is a solenoid valve control box.
Specifically, the second spraying piece 51 is disposed on the top surface of the other end of the second rocker arm 31, when the second cutting drum 32 cuts the surrounding rock, the second control piece 52 controls the second spraying piece 51 to timely spray slurry to the surface of the mining cave 20, timely support the mining cave 20, and stability of the surrounding rock and safety of coal mining of the edge are improved.
Further, the first spray member 41 includes a plurality of first top nozzles 411 and a plurality of first side nozzles 412, the plurality of first top nozzles 411 being arranged at intervals along the first direction on the top surface of the first rocker arm 21, and the plurality of first side nozzles 412 being arranged at intervals along the up-down direction on the side surface of the first rocker arm 21 remote from the second rocker arm 31.
Specifically, the first support assembly 4 further includes a first connection pipe 43 and a second connection pipe 44, the first connection pipe 43 communicates with the first control member 42 and the first top nozzle 411, and the second connection pipe 44 communicates with the first control member 42 and the first side nozzle 412, so that the first control member 42 can independently control the first top nozzle 411 and the first side nozzle 412, respectively.
Specifically, the plurality of first top nozzles 411 are uniformly arranged at intervals along the first direction, and the distance between two adjacent first top nozzles 411 is determined by the injection angle of the first top nozzles 411, so as to achieve full coverage of the width of the top surface of the production chamber 20 (the dimension of the production chamber 20 in the first direction as shown in fig. 4).
The plurality of first side nozzles 412 are uniformly arranged at intervals along the up-down direction, so that the side surfaces of the production chamber 20 can be comprehensively sprayed with slurry, and the slurry spraying efficiency of the first side nozzles 412 on the side surfaces of the production chamber 20 is effectively improved. The first side nozzle 412 is configured in the same manner as the first top nozzle 411 and can be mass-produced.
Specifically, the first control member 42 controls the first top nozzle 411 to spray slurry onto the top surface of the production chamber 20 when the first cutting drum 22 cuts the surrounding rock above. As the first cutting drum 22 moves downwardly and cuts the surrounding rock, the first control member 42 controls the first upper nozzle 412 to gunite the sides of the production chamber 20. Therefore, the stepwise slurry spraying is realized on the surface of the mining cave 20, so that not only can the materials be saved, but also the working efficiency is improved, the surface of the mining cave 20 is timely supported, and the safety of the side wall coal mining is ensured.
Further, the second spray member 51 includes a plurality of second top nozzles 511 and a plurality of second upper nozzles 512, the plurality of second top nozzles 511 are arranged at intervals along the first direction on the top surface of the second rocker arm 31, and the plurality of second upper nozzles 512 are arranged at intervals along the up-down direction on the side surface of the second rocker arm 31 away from the first rocker arm 21.
Specifically, the second support assembly 5 further includes a third connection pipe 53 and a fourth connection pipe 54, the third connection pipe 53 communicates with the second control member 52 and the second top nozzle 511, and the fourth connection pipe 54 communicates with the second control member 52 and the second upper nozzle 512, so that the second control member 52 can independently control the second top nozzle 511 and the second upper nozzle 512, respectively.
Specifically, the plurality of second top nozzles 511 are uniformly arranged at intervals along the first direction, and the distance between two adjacent second top nozzles 511 is determined by the injection angle of the second top nozzles 511, so as to achieve full coverage of the top surface width of the production chamber 20. The second top nozzle 511 protrudes toward the first rocker 21 in the first direction to spray the top surface of the production chamber 20 between the first rocker 21 and the second rocker 31, thereby realizing full coverage of the top surface of the production chamber 20.
The plurality of second side nozzles 512 are uniformly arranged at intervals along the up-down direction, so that the side surfaces of the production chamber 20 can be comprehensively sprayed with slurry, and the slurry spraying efficiency of the second side nozzles 512 on the side surfaces of the production chamber 20 is effectively improved. The second upper nozzle 512 is configured in the same manner as the second top nozzle 511, and can be mass-produced. The second top nozzle 511 and the second side nozzle 512 function in the same manner as the first top nozzle 411 and the first side nozzle 412.
Further, the side wall coal tunneling device with the temporary support function further comprises a feed box and a slurry spraying pump 7. The bin is arranged on the vehicle body 1, and the inside of the bin is suitable for storing guniting materials. Specifically, the bins include a first bin 61 and a second bin 62, the first bin 61 and the second bin 62 being mounted on the top surface of the vehicle body 1 at intervals along the second direction, the first bin 61 being adapted to store a first type of gunite material therein, and the second bin 62 being adapted to store a second type of gunite material therein.
The pulp shooting pump 7 has a feed inlet 71 and a discharge outlet 72, the pulp shooting pump 7 communicates with the tank through the feed inlet 71 so that pulp shooting material can enter the pulp shooting pump 7, and the discharge outlet 72 communicates with the first control member 42 and the second control member 52 so that pulp shooting material in the pulp shooting pump 7 can enter the first spraying member 41 and the second spraying member 51 through the first control member 42 and the second control member 52, respectively.
Specifically, the side wall coal tunneling device with the temporary support function further comprises a plurality of pipelines 8. Two feed openings 71 are provided, wherein one feed opening 71 is communicated with the first feed box 61 through a pipeline 8, and the other feed opening 71 is communicated with the second feed box 62 through a pipeline 8, so that the first type of guniting material and the second type of guniting material can be mixed in the guniting pump 7.
Two discharge ports 72 are provided, wherein one discharge port 72 is communicated with the first control member 42 through a pipeline 8 so that the guniting material in the guniting pump 7 can enter the first control member 42, and the other discharge port 72 is communicated with the second control member 52 through the pipeline 8 so that the guniting material in the guniting pump 7 can enter the second control member 52.
Further, the side wall coal tunneling device with the temporary support function further comprises a water tank 9 and a clean water pump 10. The water tank 9 is provided on the vehicle body 1. The clean water pump 10 has a water inlet 101 and a water outlet 102, the clean water pump 10 is communicated with the water tank 9 through the water inlet 101, the water outlet 102 is communicated with the first control member 42 and the second control member 52, so that water in the water tank 9 can enter the first spraying member 41 and the second spraying member 51 through the first control member 42 and the second control member 52 respectively to clean the first spraying member 41 and the second spraying member 51.
Specifically, the water inlet 101 is communicated with the water tank 9 through the pipeline 8, so that water in the water tank 9 can enter the clean water pump 10 through the pipeline 8, and the water outlet 102 is respectively communicated with the first control member 42 and the second control member 52 through the two pipelines 8. When the first spraying part 41 and the second spraying part 51 stop spraying, water is introduced into the first spraying part 41 and the second spraying part 51 through the first control part 42 and the second control part 52 so as to flush the first spraying part 41 and the second spraying part 51, and the solidification of the spraying material is avoided.
Further, the highwall coal tunnelling device with temporary support function further includes a third cutting part (not shown) and a third support assembly (not shown). The first cutting part 2, the second cutting part 3 and the third cutting part are sequentially arranged in front of the vehicle body 1 along the first direction and extend along the extending direction of the vehicle body 1, the first cutting part 2, the second cutting part 3 and the third cutting part are staggered in the extending direction of the vehicle body 1, the third cutting part can move up and down relative to the vehicle body 1, at least part of the third cutting part can rotate around the first direction relative to the vehicle body 1, and the third cutting part is used for cutting surrounding rocks. At least part of the third supporting component is arranged on the third cutting part and is used for spraying slurry on the surface of the production chamber 20 formed by cutting the surrounding rock of the third cutting part and forming a third supporting layer.
The using method of the highwall coal tunneling device with the temporary support function comprises the following steps:
s1, cutting surrounding rock by a first cutting part 2, spraying slurry to the top surface of a mining cave 20 formed by cutting the surrounding rock by a first spraying part 41 to the first cutting part 2, cutting the surrounding rock by a second cutting part 3, and spraying slurry to the top surface of the mining cave 20 formed by cutting the surrounding rock by a second spraying part 51 to the second cutting part 3.
Specifically, as shown in fig. 1 and 3, the first cutting drum 22 of the tunneling device in the mining cave 20 advances from the top of one side of the head-on solid coal to the second cutting drum 32, and in the process that the first cutting drum 22 moves inwards from the outer side of the mining cave 20, the first top nozzle 411 sprays mixed gunite material to the top plate which is not supported on one side of the solid coal under the control of the first control member 42, so as to form the first supporting layer 45. Meanwhile, the second cutting drum 32 is delayed from the first cutting drum 22 to start feeding from the top of the other side of the head-on solid coal, and in the process that the second cutting drum 32 moves inwards from the outer side of the coal mining cave 20, the second top nozzle 511 sprays mixed gunite materials to the top plate which is not supported at the other side of the solid coal under the control of the second control piece 52, so that a second supporting layer is formed.
And S11, introducing water into the first spraying piece 41 and the second spraying piece 51, and cleaning.
S2, the first cutting part 2 moves downwards to cut surrounding rocks, the first spraying piece 41 sprays slurry to the side face of the mining cave 20 formed by cutting the surrounding rocks by the first cutting part 2, the second cutting part 3 moves downwards to cut the surrounding rocks, and the second spraying piece 51 sprays slurry to the side face of the mining cave 20 formed by cutting the surrounding rocks by the second cutting part 3.
Specifically, as shown in fig. 1 and 4, after the first cutting drum 22 stops cutting forward, the first control member 42 pumps clean water to the first top nozzle 411 to wash the pipe, and after the pipe washing is completed, the pumping of clean water is stopped, and at the same time, the first cutting drum 22 cuts from the upper part to the lower part of the side of the head-on solid coal, and the first upper nozzle 412 sprays mixed gunite material to the side of the first cutting drum 22, which is far from the second cutting drum 32 and is not supported, under the control of the first control member 42, to form the first upper temporary support layer 46.
Meanwhile, after the second cutting drum 32 stops cutting forward, the second control member 52 pumps clean water to the second top nozzle 511 for pipe washing, and after pipe washing is completed, the clean water is stopped being pumped, and simultaneously, the second cutting drum 32 cuts from the upper part to the lower part of the other side of the head-on solid coal, and the second upper nozzle 512 sprays mixed gunite material to the side, which is far away from the first cutting drum 22, of the second cutting drum 32 under the control of the second control member 52, so as to form the second upper temporary support layer 55.
S21, the first cutting part 2 and the second cutting part 3 stop cutting, and water is introduced into the first spraying piece 41 and the second spraying piece 51 to clean.
S3, the first cutting part 2 ascends from the bottom of the production chamber 20 to the top of the production chamber 20 and cuts surrounding rock, and the second cutting part 3 ascends from the bottom of the production chamber 20 to the top of the production chamber 20 and cuts surrounding rock.
Specifically, after the first cutting drum 22 cuts the bottom plate of the production chamber 20 at one side of the head-on solid coal, the first control member 42 pumps clear water to the first side nozzle 412 for pipe washing, and after pipe washing is completed, the pumping of clear water is stopped, and meanwhile, the first cutting drum 22 is lifted to the top plate height from the bottom plate of the production chamber 20 under the action of the first rocker arm 21. Meanwhile, after the second cutting drum 32 cuts the bottom plate of the production chamber 20 in the other side of the head-on solid coal, the second control piece 52 pumps clean water to the second side nozzle 512 for pipe washing, and after pipe washing is completed, the pumping of clean water is stopped, and meanwhile, the second cutting drum 32 is lifted to the top plate height from the bottom plate of the production chamber 20 under the action of the second rocker arm 31.
S4, repeating the steps S1-S3. Specifically, the next cutting cycle is performed until the design depth of the production chamber 20 is reached.
Specifically, the injection angles of the top nozzle and the upper compensating nozzle are matched with the cutting depth of the cutting roller so as to ensure that the top support and the upper support formed by adjacent cutting cycles are overlapped with each other.
Further, the first rocker arm 21 and the second rocker arm 31 may operate independently, may operate synchronously according to the above steps, or may operate independently. For example, under the condition that the thicknesses of two sides of the coal seam are inconsistent or gangue is present, the cutting time of two sides of the coal seam in the same cycle is different, one side with the faster cutting can be stopped for waiting for the side with the slower cutting, and after the cutting of the two sides is completed, the tunneling device is integrally pushed into the next cycle.
The difference between the lengths of the first rocker arm 21 and the second rocker arm 31 determines the cutting time difference between two sides of the coal seam with the same section, and the temporary supporting layer of the advanced unsupported roof should reach a certain solidification strength within the time, and the rapid solidification spraying material with higher early strength is generally adopted as the spraying material, so that the solidification strength can reach more than 5MPa after 0.5h, and the final solidification strength is more than 15 MPa.
Therefore, the using method of the side wall coal tunneling device with the temporary support function realizes parallel mining-supporting operation, so that the slurry spraying operation and the cutting operation are synchronously completed, the mining speed and the efficiency of the side wall coal are not affected, the stability of surrounding rock is improved, the application range of the side wall coal mining is widened, and the width of the mining cave 20 is increased.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (3)
1. The utility model provides a slope coal tunnelling device with temporary support function which characterized in that includes:
the device comprises a vehicle body (1), a first cutting part (2) and a second cutting part (3), wherein the first cutting part (2) and the second cutting part (3) are sequentially arranged in front of the vehicle body (1) along a first direction, and extend along the extending direction of the vehicle body (1), the first cutting part (2) and the second cutting part (3) are staggered in the extending direction of the vehicle body (1), the first cutting part (2) and the second cutting part (3) can swing along the up-down direction relative to the vehicle body (1), at least part of the first cutting part (2) and at least part of the second cutting part (3) can rotate around the first direction relative to the vehicle body (1), and an included angle is formed between the up-down direction and the first direction, and the first cutting part (2) and the second cutting part (3) are used for cutting rocks;
the first supporting component (4) is at least partially arranged on the first cutting part (2) and is used for spraying slurry on the surface of a mining cave (20) formed by cutting surrounding rocks by the first cutting part (2) and forming a first supporting layer (45);
the second supporting component (5) is at least partially arranged on the second cutting part (3) and is used for spraying slurry on the surface of a mining cave (20) formed by cutting surrounding rocks by the second cutting part (3) and forming a second supporting layer;
the dimension of the first cutting part (2) in the extending direction of the vehicle body (1) is longer than the dimension of the second cutting part (3) in the extending direction of the vehicle body (1);
the first cutting part (2) comprises a first rocker arm (21) and a first cutting roller (22), one end of the first rocker arm (21) is connected with the vehicle body (1), the other end of the first rocker arm (21) is connected with the first cutting roller (22), the other end of the first rocker arm (21) can swing in the up-down direction relative to the vehicle body (1), the first cutting roller (22) can rotate around the first direction relative to the other end of the first rocker arm (21),
the first supporting component (4) comprises a first spraying piece (41) and a first control piece (42), the first spraying piece (41) is arranged at the other end of the first rocker arm (21), and the first control piece (42) is connected with the first spraying piece (41) so as to control the first spraying piece (41) to spray slurry to the surface of a mining cave (20) formed by cutting surrounding rock by the first cutting part (2);
the second cutting part (3) comprises a second rocker arm (31) and a second cutting roller (32), the second rocker arm (31) and the first rocker arm (21) are sequentially arranged along the first direction, one end of the second rocker arm (31) is connected with the vehicle body (1), the other end of the second rocker arm (31) is connected with the second cutting roller (32), the other end of the second rocker arm (31) can swing in the up-down direction relative to the vehicle body (1), the second cutting roller (32) can rotate around the first direction relative to the other end of the second rocker arm (31),
the second supporting component (5) comprises a second spraying piece (51) and a second control piece (52), the second spraying piece (51) is arranged at the other end of the second rocker arm (31), and the second control piece (52) is connected with the second spraying piece (51) so as to control the second spraying piece (51) to spray slurry on the surface of a mining cave (20) formed by cutting surrounding rock by the second cutting part (3);
the first spraying piece (41) comprises a plurality of first top nozzles (411) and a plurality of first side nozzles (412), the plurality of first top nozzles (411) are arranged on the top surface of the first rocker arm (21) at intervals along the first direction, and the plurality of first side nozzles (412) are arranged on the side surface, away from the second rocker arm (31), of the first rocker arm (21) at intervals along the up-down direction;
the second spraying piece (51) comprises a plurality of second top nozzles (511) and a plurality of second side nozzles (512), the second top nozzles (511) are arranged on the top surface of the second rocker arm (31) at intervals along the first direction, and the second side nozzles (512) are arranged on the side surface, away from the first rocker arm (21), of the second rocker arm (31) at intervals along the up-down direction;
further comprises:
a water tank (9), wherein the water tank (9) is arranged on the vehicle body (1);
a clean water pump (10), wherein the clean water pump (10) is provided with a water inlet (101) and a water outlet (102), the clean water pump (10) is communicated with the water tank (9) through the water inlet (101), the water outlet (102) is communicated with the first control piece (42) and the second control piece (52), so that water in the water tank (9) can enter the first spraying piece (41) and the second spraying piece (51) through the first control piece (42) and the second control piece (52) respectively to clean the first spraying piece (41) and the second spraying piece (51);
further comprises:
the first cutting part (2), the second cutting part (3) and the third cutting part are sequentially arranged in front of the vehicle body (1) along the first direction and extend along the extending direction of the vehicle body (1), the first cutting part (2), the second cutting part (3) and the third cutting part are staggered in the extending direction of the vehicle body (1), the third cutting part can move in the up-down direction relative to the vehicle body (1), at least part of the third cutting part can rotate around the first direction relative to the vehicle body (1), and the third cutting part is used for cutting surrounding rock;
and the third supporting component is at least partially arranged on the third cutting part and is used for spraying slurry on the surface of a mining cave (20) formed by cutting the surrounding rock of the third cutting part and forming a third supporting layer.
2. The highwall coal ripping device with temporary support function according to claim 1, further comprising:
the feed box is arranged on the vehicle body (1) and is suitable for storing guniting materials;
the slurry spraying pump (7), the slurry spraying pump (7) is provided with a feed inlet (71) and a discharge outlet (72), the slurry spraying pump (7) is communicated with the material box through the feed inlet (71), so that the slurry spraying material can enter the slurry spraying pump (7), and the discharge outlet (72) is communicated with the first control piece (42) and the second control piece (52), so that the slurry spraying material in the slurry spraying pump (7) can enter the first spraying piece (41) and the second spraying piece (51) through the first control piece (42) and the second control piece (52) respectively.
3. A method of using the highwall coal tunnelling device with temporary support according to any one of claims 1-2, comprising:
s1, a first cutting part (2) cuts surrounding rock, a first spraying part (41) sprays slurry to the top surface of a mining cave (20) formed by cutting the surrounding rock by the first cutting part (2), a second cutting part (3) cuts the surrounding rock, and a second spraying part (51) sprays slurry to the top surface of the mining cave (20) formed by cutting the surrounding rock by the second cutting part (3);
s2, the first cutting part (2) moves downwards to cut surrounding rocks, the first spraying piece (41) sprays slurry to the side face of a mining tunnel (20) formed by cutting the surrounding rocks by the first cutting part (2), the second cutting part (3) moves downwards to cut the surrounding rocks, and the second spraying piece (51) sprays slurry to the side face of the mining tunnel (20) formed by cutting the surrounding rocks by the second cutting part (3);
s3, the first cutting part (2) ascends from the bottom of the production tunnel (20) to the top of the production tunnel (20) and cuts surrounding rock, and the second cutting part (3) ascends from the bottom of the production tunnel (20) to the top of the production tunnel (20) and cuts the surrounding rock;
s4, repeating the steps S1-S3.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498671A (en) * | 2012-05-12 | 2014-01-08 | 刘素华 | Mining machine with rocker arm provided with coal-passing space |
| CN203925490U (en) * | 2014-05-09 | 2014-11-05 | 杨庆国 | A kind of longitudinal axis cylinder rocker arm anchor driving machine |
| CN209369819U (en) * | 2018-12-10 | 2019-09-10 | 山东科技大学 | A kind of cutting part of heading machine and development machine |
| CN111075444A (en) * | 2019-12-03 | 2020-04-28 | 中国煤炭科工集团太原研究院有限公司 | High-adaptability tunneling and anchoring all-in-one machine with dual-mode anchor drilling system |
| CN212428860U (en) * | 2020-06-22 | 2021-01-29 | 邬喜仓 | Coal roadway driving and guniting device |
| CN214499036U (en) * | 2021-01-28 | 2021-10-26 | 高九华 | Multi-stage rocker arm multi-cutting drum coal mining machine |
| CN114017020A (en) * | 2021-11-08 | 2022-02-08 | 中国煤炭科工集团太原研究院有限公司 | Tunneling system and tunneling and anchoring machine thereof |
| CN114294031A (en) * | 2021-11-25 | 2022-04-08 | 中国煤炭科工集团太原研究院有限公司 | Anchor spraying operation mechanism |
| CN115653605A (en) * | 2022-12-26 | 2023-01-31 | 中煤科工能源科技发展有限公司 | Continuous miner and side wall mining method of strip mine |
| CN116877116A (en) * | 2023-08-14 | 2023-10-13 | 山东科技大学 | End face variable full face heading machine |
| CN116906038A (en) * | 2023-08-23 | 2023-10-20 | 闫琳 | Tunneling device |
-
2023
- 2023-12-07 CN CN202311667949.2A patent/CN117386371B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498671A (en) * | 2012-05-12 | 2014-01-08 | 刘素华 | Mining machine with rocker arm provided with coal-passing space |
| CN203925490U (en) * | 2014-05-09 | 2014-11-05 | 杨庆国 | A kind of longitudinal axis cylinder rocker arm anchor driving machine |
| CN209369819U (en) * | 2018-12-10 | 2019-09-10 | 山东科技大学 | A kind of cutting part of heading machine and development machine |
| CN111075444A (en) * | 2019-12-03 | 2020-04-28 | 中国煤炭科工集团太原研究院有限公司 | High-adaptability tunneling and anchoring all-in-one machine with dual-mode anchor drilling system |
| CN212428860U (en) * | 2020-06-22 | 2021-01-29 | 邬喜仓 | Coal roadway driving and guniting device |
| CN214499036U (en) * | 2021-01-28 | 2021-10-26 | 高九华 | Multi-stage rocker arm multi-cutting drum coal mining machine |
| CN114017020A (en) * | 2021-11-08 | 2022-02-08 | 中国煤炭科工集团太原研究院有限公司 | Tunneling system and tunneling and anchoring machine thereof |
| CN114294031A (en) * | 2021-11-25 | 2022-04-08 | 中国煤炭科工集团太原研究院有限公司 | Anchor spraying operation mechanism |
| CN115653605A (en) * | 2022-12-26 | 2023-01-31 | 中煤科工能源科技发展有限公司 | Continuous miner and side wall mining method of strip mine |
| CN116877116A (en) * | 2023-08-14 | 2023-10-13 | 山东科技大学 | End face variable full face heading machine |
| CN116906038A (en) * | 2023-08-23 | 2023-10-20 | 闫琳 | Tunneling device |
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