CN112761572B - Air bag positioning hole sealing device for coal mine inclined large-diameter drilling sealing - Google Patents
Air bag positioning hole sealing device for coal mine inclined large-diameter drilling sealing Download PDFInfo
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- CN112761572B CN112761572B CN202011598511.XA CN202011598511A CN112761572B CN 112761572 B CN112761572 B CN 112761572B CN 202011598511 A CN202011598511 A CN 202011598511A CN 112761572 B CN112761572 B CN 112761572B
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- screw rod
- grouting
- connecting rod
- hole sealing
- hole
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- 238000005553 drilling Methods 0.000 title claims abstract description 84
- 238000007789 sealing Methods 0.000 title claims abstract description 84
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000005422 blasting Methods 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims description 47
- 239000007924 injection Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000000605 extraction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000011440 grout Substances 0.000 description 5
- 238000004939 coking Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
- Earth Drilling (AREA)
Abstract
The air bag positioning hole sealing device for sealing the inclined large-diameter drilling hole of the coal mine comprises a hole sealing assembly, a single bag and a grouting pipe, wherein the hole sealing assembly, the single bag and the grouting pipe are all arranged in the inclined large-diameter drilling hole, the outlet end of the grouting pipe is connected with the single bag, a blasting valve is arranged on the grouting pipe, and the inlet end of the grouting pipe is provided with a grouting valve positioned outside an orifice of the inclined large-diameter drilling hole; the hole sealing assembly comprises an inflatable hole sealing part and a hand-driven screw rod transmission connecting rod telescopic positioning part which are connected with each other, the grouting pipe penetrates through the inflatable hole sealing part, and the blasting valve is positioned between the single bag and the inflatable hole sealing part. The automatic grouting device is simple in structure, convenient to operate and high in automation degree, the hole sealing assembly is firmly fixed in the inclined large-diameter drilling hole, the drilling hole can be quickly sealed for grouting operation, the positioning effect is good, the stability of the bag in grouting is ensured, the problem that grouting materials, gangue and accumulated water easily enter a roadway after grouting is finished can be solved, the practicability is high, and the automatic grouting device has important popularization value.
Description
Technical Field
The invention belongs to the technical field of coal mine gas extraction drilling hole sealing, and particularly relates to an air bag positioning hole sealing device for sealing inclined large-diameter drilling holes of a coal mine.
Background
The inclined large-diameter drilling is a new goaf gas extraction technology developed in recent years, as shown in fig. 1 and 2, two sides of a coal face 50 are respectively provided with an air inlet lane 49 and an air return lane 51, namely, a gas control lane 52 is arranged beside the air return lane 51 at the coal face 50, the inclined large-diameter drilling 53 is drilled into the air return lane 51 by the gas control lane 52, the upper corner gas is extracted by replacing a connecting lane of the air return lane 51 by the inclined large-diameter drilling 53, in fig. 2, a goaf is 54, a protection coal pillar is 55, a coal seam is 56, and a gas extraction pipeline is 57.
In recent years, the gas in the goaf is extracted from the inclined large-diameter drilling hole to a certain extent. Literature: the use of inclined large diameter boreholes in coal mines is described by the ultra-large diameter borehole "hole-substitute roadway" governance upper corner gas technology (Jiang, yang Baoguo, shan-western coking coal technology, 2019:47-49), the small Zhuang Kuang "hole-substitute roadway" gas extraction technology feasibility study (Guo Linsheng, lin Jiancheng, li Ke, etc. chinese coal, 2020, 46 (9): 65-70), ultra-large diameter borehole governance upper corner gas technology study (Wang Kaiwang. Mining safety and environmental protection 2020, 47 (2): 90-93), large diameter borehole governance upper corner gas application on fully mechanized mining face (Dan Ruipeng, gao Xiang, li Hao. Shan-western coking coal technology, 2018:31-34), ultra-large diameter borehole goaf gas extraction technology study (Gao Hong, yang Hongwei. Coal science technology, 2019, 47 (2): 77-81), and in the case of security large diameter borehole extraction goaf gas technology application study (Wang Chunli. And chemical industry, 2019.42 (5): 100-103).
The sealing purpose of the inclined large-diameter drilling hole is different from that of a common drilling hole, and the purpose of the common drilling hole sealing is to prevent air from entering the drilling hole and improve the gas extraction concentration and effect; after the gas extraction pipe 57 is removed, the inclined large-diameter drilling hole needs to be closed, and the purpose of the inclined large-diameter drilling hole is to seal the large-diameter drilling hole and prevent the goaf gangue and accumulated water from entering the roadway through the inclined large-diameter drilling hole.
Because the inclined large-diameter drilling hole has a certain inclination angle, more hole sealing materials are needed. During the closing process, the closing grouting material easily slides out along the inclined large-diameter drilling hole. How to quickly and efficiently seal inclined large-diameter drilling holes becomes a key for popularization of the technology of extracting goaf gas from the inclined large-diameter drilling holes.
Disclosure of Invention
The invention provides an air bag positioning hole sealing device for sealing inclined large-diameter drilling holes in a coal mine, which aims to solve the problem that grouting materials easily slide out along the inclined large-diameter drilling holes in the sealing process of the inclined large-diameter drilling holes, and can be used for rapidly sealing the inclined large-diameter drilling holes and preventing goaf gangue and accumulated water from entering a roadway through the inclined large-diameter drilling holes.
In order to solve the technical problems, the invention adopts the following technical scheme: the air bag positioning hole sealing device for sealing the inclined large-diameter drilling hole of the coal mine comprises a hole sealing assembly, a single bag and a grouting pipe, wherein the hole sealing assembly, the single bag and the grouting pipe are all arranged in the inclined large-diameter drilling hole, the outlet end of the grouting pipe is connected with the single bag, a blasting valve is arranged on the grouting pipe, and the inlet end of the grouting pipe is provided with a grouting valve positioned outside an orifice of the inclined large-diameter drilling hole;
The hole sealing assembly comprises an inflatable hole sealing part and a hand-driven screw rod transmission connecting rod telescopic positioning part which are connected with each other, wherein the inflatable hole sealing part is positioned at the left side of the hand-driven screw rod transmission connecting rod telescopic positioning part in an inclined large-diameter drilling hole, a grouting pipe penetrates through the inflatable hole sealing part, and a blasting valve is positioned between the single bag and the inflatable hole sealing part;
The hand-driven screw rod transmission connecting rod telescopic positioning part comprises a screw rod and a connecting rod assembly, the left end of the screw rod is rotationally connected to the inflatable hole sealing part, the left half section and the right half section of the screw rod are respectively provided with a forward thread and a reverse thread, the left middle thread of the connecting rod assembly is connected to the left half section of the screw rod, the right middle thread of the connecting rod assembly is connected to the right half section of the screw rod, the right end of the screw rod is provided with a handle rod for driving the screw rod to rotate, and the right half section of the screw rod is in threaded connection with a locking device for positioning the connecting rod assembly.
The inflatable hole sealing part comprises a disc and an outer annular air bag, wherein the center of the disc is provided with a threaded hole, the outer circle of the disc is provided with an outer annular groove along the circumferential direction, the outer annular air bag is installed in the outer annular groove, a grouting perforation parallel to the threaded hole is formed in the eccentric position of the disc, a grouting pipe penetrates through the grouting perforation, the inner circle of the grouting perforation is provided with an inner annular groove, and the inner annular groove is internally provided with an inner annular air bag sleeved on the grouting pipe.
The air inlet of the inner annular air bag is connected with the air inlet of the outer annular air bag through a three-way pipe, the third interface of the three-way pipe is connected with the air injection pipe, the three-way pipe is provided with an outer air injection valve close to the air inlet of the outer annular air bag, the three-way pipe is provided with an inner air injection valve close to the air inlet of the inner annular air bag, the three-way pipe is provided with an outer pressure gauge between the outer air injection valve and the air inlet of the outer annular air bag, the three-way pipe is provided with an inner pressure gauge between the inner air injection valve and the air inlet of the inner annular air bag, the inner annular air bag is provided with an inner exhaust valve, and the outer annular air bag is provided with an outer exhaust valve.
The center of the disc is fixedly provided with a bearing seat, the left end of the bearing seat is provided with a stud in threaded connection with a threaded hole, the left end of a screw rod is rotationally connected in the bearing seat through a bearing, and the center line of the screw rod coincides with the center line of the disc;
The connecting rod assembly comprises a left nut, a right nut and three groups of V-shaped rod pieces, wherein the left nut is in threaded connection with the left half section of the screw rod, the right nut is in threaded connection with the right half section of the screw rod, the three groups of V-shaped rod pieces are uniformly arranged along the circumferential direction of the screw rod, each group of V-shaped rod pieces comprises a left connecting rod, a right connecting rod, a mounting block and a positioning needle, the inner end of the left connecting rod is rotationally connected onto the left nut, the inner end of the right connecting rod is rotationally connected onto the right nut, the screw rod is positioned on the plane where the left connecting rod and the right connecting rod of the same group are positioned, the inner side of the mounting block is provided with a mounting groove, the outer end of the left connecting rod is fixedly connected with a left gear positioned on the left side in the mounting groove, the center of the left gear is rotationally connected with the mounting block through a left pin shaft, the center of the right gear is rotationally connected with the mounting block through a right pin shaft, the left gear is meshed with the right gear, the positioning needle is arranged along the radial direction of the screw rod, and the inner end of the screw rod is fixedly connected onto the outer side of the mounting block.
The locking device comprises an outer hexagonal sleeve and four arc-shaped locking pieces, four eccentric curved surfaces are uniformly arranged on the inner ring of the outer hexagonal sleeve along the circumferential direction, the distance between an eccentric curve formed by the cross section of each eccentric curved surface and the central line of the outer hexagonal sleeve is gradually reduced along the anticlockwise direction, the two eccentric curves are connected end to end and provided with steps at the connecting position, the four arc-shaped locking pieces are respectively arranged at the inner wall of the outer hexagonal sleeve where the four eccentric curved surfaces are located, and the length of the arc-shaped locking pieces along the circumferential direction is smaller than the length of the eccentric curved surfaces; when one end of the arc-shaped locking piece is contacted with the step, the outer circle of the arc-shaped locking piece is completely attached to the eccentric curved surface, and the inner circle of the arc-shaped locking piece is concentric with the outer hexagonal sleeve;
The inner wall of four arc locking pieces is equipped with the internal thread that can correspond threaded connection with the half section on lead screw right side, and the outer wall of every arc locking piece is equipped with spacing guide slot along the circumferencial direction, and outer hexagonal cover inner wall is equipped with the mounting groove in the position that is close to the step, and the mounting groove internal fixation is equipped with the spring, and the spring outer end is equipped with the reference column, and the reference column stretches into in the spacing guide slot.
By adopting the technical scheme, the invention is used for carrying out the concrete process of sealing construction operation on the inclined large-diameter drilling hole, and comprises the following steps:
(1) Putting the single bag and the grouting pipe into the inclined large-diameter drilling hole from the hole at the right end of the inclined large-diameter drilling hole to the left, connecting the outlet end of the grouting pipe with the single bag, arranging a blasting valve on the grouting pipe, and arranging a grouting valve outside the hole of the inclined large-diameter drilling hole at the inlet end of the grouting pipe;
(2) Placing the hole sealing assembly in an inclined large diameter borehole;
(3) The inflatable hole sealing part is connected with an air injection pump through an air injection pipe, and the air injection pump is started to expand the inflatable hole sealing part to seal the inclined large-diameter drilling hole;
(4) Rotating the handle rod, driving the connecting rod assembly to extend along the radial direction of the screw rod through the screw rod until the outer end of the connecting rod assembly is jacked into the wall of the inclined large-diameter drilling hole, and then screwing the locking device to lock and position the connecting rod assembly;
(5) The inlet end of the grouting pipe is connected with a grouting pump, and the grouting pump is started to grouting into the single bag and the inclined large-diameter drilling hole between the single bag and the inflatable hole sealing part through the grouting pipe;
(6) Grouting for 24 hours, and solidifying the slurry; and removing the hole sealing assembly.
The step (3) is specifically as follows: connecting a third interface of the three-way pipe with an air injection pump through an air injection pipe, opening an outer air injection valve on the three-way pipe, closing an inner air injection valve, and starting the air injection pump to inject air into the outer annular air bag; the outer circle of the outer annular air bag expands and is in pressure connection with the inner wall of the inclined large-diameter drilling hole and is sealed, and when the reading of the outer pressure gauge is 0.3MPa, the air injection pump is closed to stop air injection; then the outer gas injection valve is closed, the inner gas injection valve is opened, the gas injection pump is started, gas is injected into the inner annular gas bag, the inner circle of the inner annular gas bag is in compression joint with the outer circle of the grouting pipe and is sealed, when the indication number of the internal pressure gauge is 0.2MPa, the gas injection pump is closed to stop gas injection, and then the inner gas injection valve is closed.
The step (4) is specifically as follows: one hand rotates the handle rod, the other hand holds a right connecting rod to drive the screw rod to rotate, because the left half section and the right half section of the screw rod are respectively provided with a forward thread and a reverse thread, a left nut in threaded connection with the left half section of the screw rod moves rightwards along the screw rod, a right nut in threaded connection with the right half section of the screw rod moves leftwards along the screw rod to drive the left connecting rod and the right connecting rod of the V-shaped rod to reduce the included angle, the left gear and the right gear are meshed to synchronously rotate the left connecting rod and the right connecting rod, the mounting block and the positioning needle move towards the hole wall of the inclined large-diameter drilling hole until the positioning needle is pricked into the hole wall of the inclined large-diameter drilling hole, the mounting block is in pressing contact with the hole wall of the inclined large-diameter drilling hole to stop rotating the handle rod, and then the outer six-edged sleeve and the four arc-shaped locking sheets move leftwards to be in contact with the right nut, then, the outer hexagonal sleeve is clamped by using a wrench, the outer hexagonal sleeve is driven to rotate, the distance between an eccentric curve formed by the cross section of each section of eccentric curved surface and the central line of the outer hexagonal sleeve is gradually reduced along the anticlockwise direction, the eccentric curved surface drives four arc-shaped locking pieces to move towards the center of the screw rod simultaneously, the inner wall of each arc-shaped locking piece is connected with the right half section of the screw rod in a threaded manner, the outer hexagonal sleeve is continuously rotated, the outer hexagonal sleeve and the four arc-shaped locking pieces rotate along the screw rod and move leftwards until the left end of the outer hexagonal sleeve compresses a right nut, and the four arc-shaped locking pieces and the screw rod are fastened simultaneously to complete the positioning of an included angle of a V-shaped rod piece, so that firm positioning connection of a telescopic positioning part of a hand-driven screw rod transmission connecting rod is ensured to be connected with the wall of an inclined large-diameter drilling hole.
The concrete process of grouting in the step (5) is as follows: the grouting method comprises the steps of firstly connecting a grouting outlet of a grouting pump with an inlet end of a grouting pipe through a quick connector, opening a grouting valve, injecting grout into a single bag through the grouting pipe by the grouting pump, plugging an inclined large-diameter drilling hole by expanding the single bag, forming a grouting hole sealing section between the single bag and a disc, opening a blasting valve when grouting pressure is greater than 1.2MPa, grouting the inside of the grouting hole sealing section by grout, closing the grouting valve until the grouting hole sealing section is filled with grout, and separating the quick connector from the inlet end of the grouting pipe.
The specific process for dismantling the hole sealing assembly in the step (6) is as follows: the outer hexagonal sleeve is clamped by using a wrench, the outer hexagonal sleeve is reversely rotated, the four arc-shaped locking pieces are loosened, then the handle rod is reversely rotated, the left nut is driven to move leftwards along the screw rod after the screw rod rotates, the right nut moves rightwards along the screw rod, the included angle between the left connecting rod and the right connecting rod of the V-shaped rod piece is increased, the mounting block and the positioning needle move towards the center of the inclined large-diameter drilling hole, and the handle rod is stopped rotating after the positioning needle is separated from the wall of the inclined large-diameter drilling hole; then opening an inner exhaust valve on the inner annular air bag to deflate the inner annular air bag; then the outer annular air bag is deflated through an outer exhaust valve on the outer annular air bag, and the outer circle of the outer annular air bag is separated from contact with the wall of the drilled hole; finally, the whole hole sealing assembly is pulled out of the inclined large-diameter drilling hole along the grouting pipe, and the grouting pipe is left in the inclined large-diameter drilling hole; in order to facilitate storage of the telescopic positioning part of the manual screw rod transmission connecting rod, the handle rod is further rotated, the left nut continues to move leftwards along the screw rod, and the right nut moves rightwards along the screw rod, so that the included angle between the left connecting rod and the right connecting rod of the V-shaped rod piece is close to 180 degrees and is parallel to the screw rod.
In the invention, the disc of the inflatable hole sealing part is made of toughened glass, so that grouting conditions in a drilled hole can be observed through the disc; the outer circle of the disc is provided with an outer annular groove, so that the outer annular air bag for fixedly mounting the outer annular air bag is easier to fix; the grouting device comprises a circular disc, a grouting perforation is arranged on the circular disc, an inner annular groove for fixedly installing an inner annular air bag is arranged on the inner wall of the grouting perforation, the outer annular air bag is fixed on the periphery of the circular disc, the main function is to seal a gap between the circular disc and the inner wall of the inclined large-diameter drilling hole, and the main function of the inner annular air bag is to seal the gap between a grouting pipe and the grouting perforation. Through the setting of interior annular gasbag and outer annular gasbag for hole sealing sub-assembly will incline the shutoff of major diameter drilling tightly, the thick liquid can not reveal to the drill way when guaranteeing to slip casting. Because the inner wall of the inclined large-diameter drilling hole is not smooth, the air pressure of the outer annular air bag is larger than that of the inner annular air bag.
According to the invention, the telescopic positioning part of the manual screw rod transmission connecting rod adopts the left nut and the right nut which are in threaded connection with the forward and reverse threads of the manual screw rod transmission screw rod, three groups of V-shaped rods are arranged between the left nut and the right nut, so that the V-shaped rods can be extended or shortened along the radial direction, and the puncture on the mounting block is inserted into the hole wall of the inclined large-diameter drilling hole during extension, so that a solid support is provided for the inflatable expansion hole sealing part in the grouting process. When the screw rod is disassembled, the screw rod is reversely rotated, the three groups of V-shaped rod pieces can be shortened along the radial direction, and the puncture is separated from the wall of the inclined large-diameter drilling hole.
When the screw rod rotates, the locking device is not in threaded connection with the screw rod, after the screw rod rotates in place, in order to limit the screw rod not to rotate, the locking device with a unique structure is adopted, and the locking device adopts a mode of driving four arc locking pieces to be in threaded connection with the screw rod by rotating the outer hexagonal sleeve and compressing the right nut. Four sections eccentric curved surfaces that outer hexagonal cover inner wall set up make four arc locking pieces and screw rod screw thread fastening connection through outer hexagonal cover rotation, outer hexagonal cover and right nut crimping simultaneously, the stability of V type pole piece contained angle. The arrangement of the springs and the positioning columns prevents the four arc-shaped locking pieces from moving axially in the outer hexagonal sleeve, and prevents the four arc-shaped locking pieces from falling off when being sent into the outer hexagonal sleeve.
In conclusion, the invention has the advantages of scientific principle, simple structure, convenient operation, high automation degree, strong practicability and important popularization value, and the hole sealing assembly is firmly fixed in the inclined large-diameter drilling hole and can be used for rapidly sealing the drilling hole to perform grouting operation, the positioning effect is good, the stability of the bag in grouting is ensured, the problem that grouting materials, gangue and accumulated water easily enter a roadway after grouting is finished is solved.
Drawings
FIG. 1 is a plan view of an inclined large diameter borehole;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of the present invention in an operative state;
FIG. 4 is a schematic perspective view of the V-shaped rod member of the sealing assembly of the present invention after being unfolded;
FIG. 5 is a schematic perspective view showing a V-shaped rod member of the sealing assembly of the present invention after being contracted;
FIG. 6 is a cross-sectional view of the disc, inner annular balloon and outer annular balloon;
Fig. 7 is an enlarged view at B in fig. 4;
FIG. 8 is a cross-sectional view of the locking device of FIG. 4;
FIG. 9 is a top view of the locking device;
Fig. 10 is a schematic horizontal cross-section of the outer hexagonal sleeve of the locking device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are intended to be within the scope of the present invention.
As shown in fig. 3-8, the air bag positioning hole sealing device for sealing the inclined large-diameter drilling hole of the coal mine comprises a hole sealing assembly, a single bag 32 and a grouting pipe 3 which are all arranged in the inclined large-diameter drilling hole 2, wherein the outlet end of the grouting pipe 3 is connected with the single bag 32, a blasting valve 33 is arranged on the grouting pipe 3, and a grouting valve 31 positioned outside the orifice of the inclined large-diameter drilling hole 2 is arranged at the inlet end of the grouting pipe 3.
The hole sealing assembly comprises an inflatable hole sealing part 1 and a hand-driven screw rod transmission connecting rod telescopic positioning part 30 which are connected with each other, wherein the inflatable hole sealing part 1 is positioned at the left side of the hand-driven screw rod transmission connecting rod telescopic positioning part 30 in the inclined large-diameter drilling hole 2, a grouting pipe 3 penetrates through the inflatable hole sealing part 1, and a blasting valve 33 is positioned between the single bag 32 and the inflatable hole sealing part 1.
The hand-driven screw rod transmission connecting rod telescopic positioning part 30 comprises a screw rod 6 and a connecting rod assembly, the left end of the screw rod 6 is rotationally connected to the inflatable hole sealing part 1, a forward thread and a reverse thread are respectively arranged on the left half section and the right half section of the screw rod 6, the left middle thread of the connecting rod assembly is connected to the left half section of the screw rod 6, the right middle thread of the connecting rod assembly is connected to the right half section of the screw rod 6, a handle rod 7 for driving the screw rod 6 to rotate is arranged at the right end of the screw rod 6, and a locking device 19 for positioning the connecting rod assembly is connected to the right half section of the screw rod 6.
The inflatable hole sealing part 1 comprises a disc 5 and an outer annular air bag 8, wherein a threaded hole 9 is formed in the center of the disc 5, an outer annular groove is formed in the outer circle of the disc 5 along the circumferential direction, the outer annular air bag 8 is installed in the outer annular groove, a grouting perforation 10 parallel to the threaded hole 9 is formed in the eccentric position of the disc 5, a grouting pipe 3 is arranged in the grouting perforation 10 in a penetrating mode, an inner annular groove is formed in the inner circle of the grouting perforation 10, and an inner annular air bag 11 sleeved on the grouting pipe 3 is arranged in the inner annular groove.
The air inlet of the inner annular air bag 11 is connected with the air inlet of the outer annular air bag 8 through a three-way pipe 12, the third interface of the three-way pipe 12 is connected with the air injection pipe, an outer air injection valve 13 adjacent to the air inlet of the outer annular air bag 8 is arranged on the three-way pipe 12, an inner air injection valve 14 adjacent to the air inlet of the inner annular air bag 11 is arranged on the three-way pipe 12, an outer pressure gauge 15 is arranged between the outer air injection valve 13 and the air inlet of the outer annular air bag 8 on the three-way pipe 12, an inner pressure gauge 16 is arranged between the inner air injection valve 14 and the air inlet of the inner annular air bag 11 on the three-way pipe 12, an inner exhaust valve 17 is arranged on the inner annular air bag 11, and an outer exhaust valve 18 is arranged on the outer annular air bag 8.
The center of the disc 5 is fixedly provided with a bearing seat 20, the left end of the bearing seat 20 is provided with a stud in threaded connection with the threaded hole 9, the left end of the screw rod 6 is rotationally connected in the bearing seat 20 through a bearing, and the center line of the screw rod 6 coincides with the center line of the disc 5;
The connecting rod assembly comprises a left nut 21, a right nut 22 and three groups of V-shaped rod pieces, wherein the left nut 21 is in threaded connection with the left half section of the screw rod 6, the right nut 22 is in threaded connection with the right half section of the screw rod 6, the three groups of V-shaped rod pieces are uniformly arranged along the circumferential direction of the screw rod 6, each group of V-shaped rod pieces comprises a left connecting rod 23, a right connecting rod 24, a mounting block 25 and a positioning needle 26, the inner end of the left connecting rod 23 is rotationally connected to the left nut 21, the inner end of the right connecting rod 24 is rotationally connected to the right nut 22, the screw rod 6 is positioned on the plane where the left connecting rod 23 and the right connecting rod 24 of the same group are positioned, a mounting groove 29 is formed in the inner side of the mounting block 25, the outer end of the left connecting rod 23 is fixedly connected to a left gear 27 positioned on the left side of the mounting groove 29, the center of the left gear 27 is rotationally connected with the mounting block 25 through a left pin shaft, the center of the right gear 28 is rotationally connected with the mounting block 25 through a right pin shaft, the left gear 27 is meshed with the right gear 28, the positioning needle 26 is arranged along the radial direction of the screw rod 6, and the inner end of the screw rod 6 is fixedly connected to the outer side of the mounting block 25.
The locking device 19 comprises an outer hexagonal sleeve 34 and four arc-shaped locking pieces 35, four eccentric curved surfaces 36 are uniformly arranged on the inner ring of the outer hexagonal sleeve 34 along the circumferential direction, the distance between an eccentric curve formed by the cross section of each eccentric curved surface 36 and the central line of the outer hexagonal sleeve 34 is gradually reduced along the anticlockwise direction, the two eccentric curves are connected end to end and provided with steps 40 at the connecting positions, the four arc-shaped locking pieces 35 are respectively arranged at the inner wall of the outer hexagonal sleeve 34 where the four eccentric curved surfaces 36 are positioned, and the length of the arc-shaped locking pieces 35 along the circumferential direction is smaller than the length of the eccentric curved surfaces 36; when one end of the arc-shaped locking piece 35 is contacted with the step 40, the outer circle of the arc-shaped locking piece 35 is completely attached to the eccentric curved surface 36, and the inner circle of the arc-shaped locking piece 35 is concentric with the outer hexagonal sleeve 34;
The inner wall of four arc locking pieces 35 is equipped with the internal thread that can correspond threaded connection with the right half section of lead screw 6, and the outer wall of every arc locking piece 35 is equipped with spacing guide slot 37 along the circumferencial direction, and outer hexagonal cover 34 inner wall is equipped with mounting groove 29 in the position that is close to step 40, and the mounting groove 29 internal fixation is equipped with spring 38, and the spring 38 outer end is equipped with reference column 39, and reference column 39 stretches into in the spacing guide slot 37.
The invention relates to a concrete process for carrying out closed construction operation on inclined large-diameter drilling holes, which comprises the following steps:
(1) Putting the single bag 32 and the grouting pipe 3 into the inclined large-diameter drilling hole 2 leftwards from the hole at the right end of the inclined large-diameter drilling hole 2, connecting the outlet end of the grouting pipe 3 with the single bag 32, arranging a blasting valve 33 on the grouting pipe 3, and arranging a grouting valve 31 positioned outside the hole of the inclined large-diameter drilling hole 2 at the inlet end of the grouting pipe 3;
(2) Placing the hole sealing assembly in an inclined large diameter borehole 2;
(3) The inflatable hole sealing part 1 is connected with an air injection pump through an air injection pipe, and the air injection pump is started to enable the inflatable hole sealing part 1 to expand so as to seal the inclined large-diameter drilling hole 2;
(4) The handle rod 7 is rotated, the connecting rod assembly is driven by the screw rod 6 to extend along the radial direction of the screw rod 6 until the outer end of the connecting rod assembly is jacked into the hole wall of the inclined large-diameter drilling hole 2, and then the locking device 19 is screwed to lock and position the connecting rod assembly;
(5) The inlet end of the grouting pipe 3 is connected with a grouting pump 4, and the grouting pump 4 is started to grouting into the single sac 32 and the inclined large-diameter drilling hole 2 between the single sac 32 and the inflatable hole sealing part 1 through the grouting pipe 3;
(6) Grouting for 24 hours, and solidifying the slurry; and removing the hole sealing assembly.
The step (3) is specifically as follows: connecting a third interface of the three-way pipe 12 with an air injection pump through an air injection pipe, opening an outer air injection valve 13 on the three-way pipe 12, closing an inner air injection valve 14, and starting the air injection pump to inject air into the outer annular air bag 8; the outer circle of the outer annular air bag 8 expands and is in pressure connection with the inner wall of the inclined large-diameter drilling hole 2 and is sealed, and when the reading of the outer pressure gauge 15 is 0.3MPa, the air injection pump is closed to stop air injection; then the outer gas injection valve 13 is closed, the inner gas injection valve 14 is opened, the gas injection pump is started again, gas is injected into the inner annular gas bag 11, the inner circle of the inner annular gas bag 11 is in compression joint with the outer circle of the grouting pipe 3 and is sealed, when the indication of the internal pressure gauge 16 is 0.2MPa, the gas injection pump is closed to stop gas injection, and then the inner gas injection valve 14 is closed.
The step (4) is specifically as follows: one hand rotates the handle rod 7, the other hand holds one right connecting rod 24, the screw rod 6 is driven to rotate, since the left half section and the right half section of the screw rod 6 are respectively provided with a forward thread and a reverse thread, the left nut 21 in threaded connection with the left half section of the screw rod 6 moves rightwards along the screw rod 6, the right nut 22 in threaded connection with the right half section of the screw rod 6 moves leftwards along the screw rod 6, the included angle between the left connecting rod 23 and the right connecting rod 24 of the V-shaped rod piece is driven to be smaller, the left gear 27 and the right gear 28 are meshed to synchronously rotate the left connecting rod 23 and the right connecting rod 24, the mounting block 25 and the positioning needle 26 move towards the hole wall of the inclined large-diameter drilling hole 2 until the positioning needle 26 is pricked into the hole wall of the inclined large-diameter drilling hole 2, the mounting block 25 is in pressing contact with the hole wall of the inclined large-diameter drilling hole 2, then the rotating handle rod 7 is stopped, and then the outer six-edged sleeve 34 and the four arc-shaped locking pieces 35 move leftwards until contacting with the right nut 22, then, the outer hexagonal sleeve 34 is clamped by using a wrench, the outer hexagonal sleeve 34 is driven to rotate, and as the distance between the eccentric curve formed by the cross section of each section of eccentric curved surface 36 and the central line of the outer hexagonal sleeve 34 is gradually reduced along the anticlockwise direction, the eccentric curved surface 36 drives the four arc-shaped locking pieces 35 to move towards the center of the screw rod 6 at the same time, the inner wall of the arc-shaped locking piece 35 is in threaded connection with the right half section of the screw rod 6, the outer hexagonal sleeve 34 and the four arc-shaped locking pieces 35 continue to rotate and move leftwards along the screw rod 6 until the left end of the outer hexagonal sleeve 34 compresses the right nut 22, and the four arc-shaped locking pieces 35 and the screw rod 6 are fastened to complete the positioning of the included angle of the V-shaped rod piece, so that the hand-driven screw rod 6 is ensured to be firmly positioned and connected with the hole wall of the inclined large-diameter drilling hole 2.
The concrete process of grouting in the step (5) is as follows: the grouting method comprises the steps of firstly connecting a grouting outlet of a grouting pump 4 with an inlet end of a grouting pipe 3 through a quick connector 41, opening a grouting valve 31, injecting grout into a single bag 32 through the grouting pipe 3 by the grouting pump 4, sealing an inclined large-diameter drilling hole 2 by expanding the single bag 32, forming a grouting hole sealing section between the single bag 32 and a disc 5, when grouting pressure is greater than 1.2MPa, opening a blasting valve 33, grouting the inside of the grouting hole sealing section until grout is fully injected into the grouting hole sealing section, closing the grouting valve 31, and separating the quick connector 41 from the inlet end of the grouting pipe 3.
The specific process for dismantling the hole sealing assembly in the step (6) is as follows: the outer hexagonal sleeve 34 is clamped by using a wrench, the outer hexagonal sleeve 34 is reversely rotated, the four arc-shaped locking pieces 35 are loosened, then the handle rod 7 is reversely rotated, the left nut 21 is driven to move leftwards along the screw rod 6 after the screw rod 6 rotates, the right nut 22 moves rightwards along the screw rod 6, the included angle between the left connecting rod 23 and the right connecting rod 24 of the V-shaped rod piece is increased, the mounting block 25 and the positioning needle 26 move towards the center of the inclined large-diameter drilling hole 2, and the handle rod 7 is stopped rotating after the positioning needle 26 is separated from the hole wall of the inclined large-diameter drilling hole 2; then the inner exhaust valve 17 on the inner annular air bag 11 is opened to deflate the inner annular air bag 11; then the outer annular air bag 8 is deflated through the outer exhaust valve 18 on the outer annular air bag 8, and the outer circle of the outer annular air bag 8 is separated from contact with the wall of the drilled hole; finally, the whole hole sealing assembly is pulled out of the inclined large-diameter drilling hole 2 along the grouting pipe 3, and the grouting pipe 3 is left in the inclined large-diameter drilling hole 2; in order to facilitate the storage of the telescopic positioning part 30 of the transmission connecting rod of the manual screw rod 6, the handle rod 7 is further rotated, the left nut 21 continues to move leftwards along the screw rod 6, and the right nut 22 moves rightwards along the screw rod 6, so that the included angle between the left connecting rod 23 and the right connecting rod 24 of the V-shaped rod piece is approximately 180 degrees and is parallel to the screw rod 6.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (2)
1. Be used for closed gasbag location hole sealing device of colliery slope major diameter drilling, slope major diameter drilling left and right low slope sets up, its characterized in that: the device comprises a hole sealing assembly, a single bag and a grouting pipe, wherein the hole sealing assembly, the single bag and the grouting pipe are all arranged in an inclined large-diameter drilling hole, the outlet end of the grouting pipe is connected with the single bag, a blasting valve is arranged on the grouting pipe, and the inlet end of the grouting pipe is provided with a grouting valve positioned outside an orifice of the inclined large-diameter drilling hole;
The hole sealing assembly comprises an inflatable hole sealing part and a hand-driven screw rod transmission connecting rod telescopic positioning part which are connected with each other, wherein the inflatable hole sealing part is positioned at the left side of the hand-driven screw rod transmission connecting rod telescopic positioning part in an inclined large-diameter drilling hole, a grouting pipe penetrates through the inflatable hole sealing part, and a blasting valve is positioned between the single bag and the inflatable hole sealing part;
The hand-driven screw rod transmission connecting rod telescopic positioning part comprises a screw rod and a connecting rod assembly, the left end of the screw rod is rotationally connected to the inflatable hole sealing part, the left half section and the right half section of the screw rod are respectively provided with a forward thread and a reverse thread, the middle part of the left side of the connecting rod assembly is in threaded connection with the left half section of the screw rod, the middle part of the right side of the connecting rod assembly is in threaded connection with the right half section of the screw rod, the right end of the screw rod is provided with a handle rod for driving the screw rod to rotate, and the right half section of the screw rod is in threaded connection with a locking device for positioning the connecting rod assembly;
The inflatable hole sealing part comprises a disc and an outer annular air bag, a threaded hole is formed in the center of the disc, an outer annular groove is formed in the outer circle of the disc along the circumferential direction, the outer annular air bag is installed in the outer annular groove, a grouting perforation parallel to the threaded hole is formed in the eccentric position of the disc, a grouting pipe penetrates through the grouting perforation, an inner annular groove is formed in the inner circle of the grouting perforation, and an inner annular air bag sleeved on the grouting pipe is arranged in the inner annular groove;
The air inlet of the inner annular air bag is connected with the air inlet of the outer annular air bag through a three-way pipe, a third interface of the three-way pipe is connected with an air injection pipe, an outer air injection valve close to the air inlet of the outer annular air bag is arranged on the three-way pipe, an inner air injection valve close to the air inlet of the inner annular air bag is arranged on the three-way pipe, an outer pressure gauge is arranged between the outer air injection valve and the air inlet of the outer annular air bag on the three-way pipe, an inner pressure gauge is arranged between the inner air injection valve and the air inlet of the inner annular air bag on the three-way pipe, an inner exhaust valve is arranged on the inner annular air bag, and an outer exhaust valve is arranged on the outer annular air bag;
The center of the disc is fixedly provided with a bearing seat, the left end of the bearing seat is provided with a stud in threaded connection with a threaded hole, the left end of a screw rod is rotationally connected in the bearing seat through a bearing, and the center line of the screw rod coincides with the center line of the disc;
The connecting rod assembly comprises a left nut, a right nut and three groups of V-shaped rod pieces, wherein the left nut is in threaded connection with the left half section of the screw rod, the right nut is in threaded connection with the right half section of the screw rod, the three groups of V-shaped rod pieces are uniformly arranged along the circumferential direction of the screw rod, each group of V-shaped rod pieces comprises a left connecting rod, a right connecting rod, a mounting block and a positioning needle, the inner end of the left connecting rod is rotationally connected onto the left nut, the inner end of the right connecting rod is rotationally connected onto the right nut, the screw rod is positioned on the plane where the left connecting rod and the right connecting rod of the same group are positioned, the inner side of the mounting block is provided with a mounting groove, the outer end of the left connecting rod is fixedly connected with a left gear positioned on the left side in the mounting groove, the center of the left gear is rotationally connected with the mounting block through a left pin shaft, the center of the right gear is rotationally connected with the mounting block through a right pin shaft, the left gear is meshed with the right gear, the positioning needle is arranged along the radial direction of the screw rod, and the inner end of the screw rod is fixedly connected onto the outer side of the mounting block.
2. The air bag positioning and hole sealing device for sealing inclined large-diameter drill holes of coal mines according to claim 1, wherein the device comprises: the locking device comprises an outer hexagonal sleeve and four arc-shaped locking pieces, four eccentric curved surfaces are uniformly arranged on the inner ring of the outer hexagonal sleeve along the circumferential direction, the distance between an eccentric curve formed by the cross section of each eccentric curved surface and the central line of the outer hexagonal sleeve is gradually reduced along the anticlockwise direction, the two eccentric curves are connected end to end and provided with steps at the connecting position, the four arc-shaped locking pieces are respectively arranged at the inner wall of the outer hexagonal sleeve where the four eccentric curved surfaces are located, and the length of the arc-shaped locking pieces along the circumferential direction is smaller than the length of the eccentric curved surfaces; when one end of the arc-shaped locking piece is contacted with the step, the outer circle of the arc-shaped locking piece is completely attached to the eccentric curved surface, and the inner circle of the arc-shaped locking piece is concentric with the outer hexagonal sleeve;
The inner wall of four arc locking pieces is equipped with the internal thread that can correspond threaded connection with the half section on lead screw right side, and the outer wall of every arc locking piece is equipped with spacing guide slot along the circumferencial direction, and outer hexagonal cover inner wall is equipped with the mounting groove in the position that is close to the step, and the mounting groove internal fixation is equipped with the spring, and the spring outer end is equipped with the reference column, and the reference column stretches into in the spacing guide slot.
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| CN113107420B (en) * | 2021-05-11 | 2022-10-18 | 山东尔辰智控科技有限公司 | Accurate positioning and rapid hole sealing method for mining inclined large-diameter deep hole |
| CN113914815B (en) * | 2021-09-30 | 2024-06-25 | 吕梁学院 | Long-distance multistage grouting hole sealing device for coal mine gas extraction drilling |
| CN114320413A (en) * | 2021-11-26 | 2022-04-12 | 淮北矿业股份有限公司 | A high pressure resistant accurate location hole sealing device for slip casting stock |
| CN114673482B (en) * | 2022-03-29 | 2022-10-11 | 无锡工艺职业技术学院 | Portable system of patrolling and examining in 5G wisdom colliery |
| CN115182352B (en) * | 2022-08-09 | 2023-04-11 | 中铁建工集团有限公司 | Grouting pipe pile construction device and construction method |
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| CN107387141B (en) * | 2017-09-12 | 2020-05-19 | 中国矿业大学 | Self-drilling type differential grouting combined anchor rod and anchoring method thereof |
| CN108825164A (en) * | 2018-08-27 | 2018-11-16 | 陈芳芳 | The blowout hookup of oil well being easily installed |
| CN110541726B (en) * | 2019-06-12 | 2024-10-29 | 义马煤业集团孟津煤矿有限责任公司 | Two-plug two-injection one-return type through pipe direct connection hole sealing method for coal mine gas drainage |
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