CN108278096B - Dynamic self-adaptive hole sealing device and method for coal seam floor penetrating drilling - Google Patents
Dynamic self-adaptive hole sealing device and method for coal seam floor penetrating drilling Download PDFInfo
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- CN108278096B CN108278096B CN201810270733.5A CN201810270733A CN108278096B CN 108278096 B CN108278096 B CN 108278096B CN 201810270733 A CN201810270733 A CN 201810270733A CN 108278096 B CN108278096 B CN 108278096B
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- 238000007789 sealing Methods 0.000 title claims abstract description 138
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 239000003245 coal Substances 0.000 title claims description 25
- 230000000149 penetrating effect Effects 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 12
- 238000000605 extraction Methods 0.000 claims abstract description 106
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 239000011435 rock Substances 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000004568 cement Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 2
- 230000018109 developmental process Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims 1
- 239000003566 sealing material Substances 0.000 abstract description 6
- 238000007569 slipcasting Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The dynamic self-adaptive hole sealing device comprises a drainage pipe and a grouting liquid sealing device which are arranged side by side, wherein the grouting liquid sealing device comprises a grouting pipe, a grouting liquid pipe, a first bag, a second bag and a third bag which are sequentially and fixedly connected to the grouting pipe, the rear end of the front end opening of the grouting pipe is provided with a plug, the grouting liquid pipe and the grouting pipe are arranged side by side, the front end and the rear end of the grouting pipe are both open, the grouting liquid pipe passes through the space between the first bag and the grouting pipe, and the rear end opening of the grouting liquid pipe is arranged between the first bag and the second bag; the telescopic extraction pipe and the grouting pipe are wrapped by the first bag, the second bag and the third bag. The invention is suitable for dynamic deformation such as stretching and dislocation of the extraction drilling hole, ensures the perfect tightness of the hole sealing material and the extraction pipe, timely seals the dynamic cracks formed in the loose ring, cuts off the leakage passage and ensures the efficient extraction of the bottom plate through-layer drilling hole.
Description
Technical Field
The invention relates to the field of coal mine machinery, in particular to a dynamic self-adaptive hole sealing device and method for a coal seam floor penetrating drill hole.
Background
Coal seam gas is not only a main factor affecting the safe and efficient production of coal mines, but also a precious energy resource. The gas extraction is a fundamental measure for eliminating major gas accidents of coal mines, and is also an important measure for acquiring clean energy, increasing energy supply and reducing environmental pollution. Along with deep mining of the mine, the gas pressure and the gas content are increased, the gas disasters are serious, and the gas extraction becomes an important technical means for guaranteeing the safe production of the high-gas mine and the outstanding mine, so that the method is widely applied.
Due to the limitation of geological conditions and the influence of low air permeability and soft coal seam, the problems of shallow drilling depth, uneven control and the like of the traditional bedding drilling are easy to occur, and the gas control effect cannot be fundamentally ensured. The coal seam is constructed by using the coal seam bottom plate rock roadway to drill holes in a penetrating layer, and large-area pre-extraction is carried out on an unadopted area, so that the drill holes are guaranteed to be arranged in place and controlled uniformly, and the safety operation is guaranteed by means of protection of the rock pillar. The floor penetrating drilling pre-drainage of coal seam gas becomes a main technical measure for preventing coal and gas outburst accidents of outburst mines and ensuring safe operation.
In order to extract gas efficiently, the extraction borehole must be sealed. The existing coal seam gas extraction drilling hole sealing method mainly comprises polyurethane foaming material hole sealing, cement slurry hole sealing, special hole packer hole sealing and combined hole sealing. The essence of the hole sealing methods belongs to the disposable plugging technology, and the dynamic deformation characteristics of the drilled holes are not considered, so that the hole sealing effect is not ideal, and the gas extraction effect is poor.
According to mine pressure knowledge and underground observation, a loose ring exists around the rock roadway, and the range is generally 3-5 times of the roadway radius. In the loosening ring, the rock is subjected to the phenomena of separation layer, dislocation, expansion and the like, and if the hole sealing material of the extraction drilling hole and the extraction pipe are not suitable for the dynamic change, the integrity of the extraction pipe and the solid hole sealing section without expansion is extremely easily damaged, so that the extraction drilling hole leaks air; the extraction drilling hole is subjected to the action of tensile stress and shearing stress, so that the hole sealing material and the extraction pipe are broken in a pulling way and are staggered, an air leakage channel is formed, and the gas extraction effect is reduced.
Disclosure of Invention
Aiming at the problems, the invention provides a dynamic self-adaptive hole sealing device and method for a coal seam bottom plate through-layer drilling hole, which are suitable for dynamic deformation such as stretching and dislocation of the extraction drilling hole through the cooperation of a solid-liquid two-phase hole sealing technology and a telescopic extraction pipe, ensure perfect tightness of hole sealing materials and the extraction pipe, timely seal dynamic cracks formed in a loosening ring, isolate a gas leakage channel and ensure efficient extraction of the bottom plate through-layer drilling hole.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a coal seam bottom plate wears layer drilling developments self-adaptation hole sealing device, includes extraction pipe and slip casting hole sealing device that sets up side by side, slip casting hole sealing device includes slip casting pipe, slip casting pipe and first bag, second bag and the third bag of fixed connection on the slip casting pipe in order, and the front end open rear end of slip casting pipe is provided with the end cap, be provided with the first unidirectional slip casting subassembly, second unidirectional slip casting subassembly and the third unidirectional slip casting subassembly of control to first bag, second bag and third bag slip casting on the slip casting pipe, be provided with the blast valve on the slip casting pipe between second bag and the third bag; the liquid injection pipe and the grouting pipe are arranged side by side, the front end and the rear end of the liquid injection pipe are both open, the liquid injection pipe passes through the space between the first bag and the grouting pipe, and the rear end opening of the liquid injection pipe is arranged between the first bag and the second bag; the telescopic extraction pipe and the grouting pipe are wrapped by the first bag, the second bag and the third bag.
Preferably, the extraction pipe is a telescopic extraction pipe, the telescopic extraction pipe comprises a first extraction pipe, a second extraction pipe and a sealing pipe, the rear end of the first extraction pipe is connected with the front end of the second extraction pipe through the sealing pipe, the sealing pipe is sleeved outside the joint of the first extraction pipe and the second extraction pipe, the diameters of the first extraction pipe and the second extraction pipe are the same, the diameter of the sealing pipe is larger than that of the first extraction pipe and the second extraction pipe, the second extraction pipe is fixedly connected with the sealing pipe in a sealing way, and the first extraction pipe is connected with the sealing pipe in a sealing sliding way.
Preferably, a sealing ring assembly for ensuring tightness is arranged between the first extraction pipe and the sealing pipe, the sealing ring assembly is sleeved outside the first extraction pipe and comprises a first sealing ring, a second sealing ring and a third sealing ring, a first groove and a second groove for placing the first sealing ring and the second sealing ring are formed in the inner side of the sealing pipe, and a third groove for placing the third sealing ring is formed in the front end of the first extraction pipe.
Preferably, the rear end of the second extraction pipe is provided with a plurality of small holes.
Preferably, the first unidirectional grouting component is arranged in the first bag in a sealing way, the second unidirectional grouting component is arranged in the second bag in a sealing way, and the third unidirectional grouting component is arranged in the third bag in a sealing way.
Preferably, the first unidirectional grouting component, the second unidirectional grouting component and the third unidirectional grouting component have the same structure and comprise grouting sleeves, grouting holes are formed in the grouting pipes at positions corresponding to the first capsular bag, the second capsular bag and the third capsular bag, and the grouting sleeves are sleeved at positions corresponding to the grouting holes in the grouting pipes.
Preferably, two ends of the first bag, the second bag and the third bag are fixed on the grouting pipe through bag pipe hoops.
The hole sealing method adopting the hole sealing device comprises the following steps:
① . Drilling holes in the coal seam construction floor through the floor rock roadway;
② . After the bottom plate layer-penetrating drilling is finished, a telescopic extraction pipe with proper length and a grouting and liquid injection hole sealer are selected according to the drilling construction depth, and are combined together and placed at a preset position in the bottom plate layer-penetrating drilling; meanwhile, a sealing tube of the telescopic extraction tube is ensured to be positioned between a first bag and a second bag of the grouting liquid injection hole sealer;
③ . Connecting a grouting pipe of a grouting liquid sealing device with a grouting device, injecting prepared cement slurry into a drilled hole, opening a first unidirectional grouting assembly, a second unidirectional grouting assembly and a third unidirectional grouting assembly under the action of grouting pressure, injecting the cement slurry into a first bag, a second bag and a third bag to expand the bags, forming independent intervals between the first bag and the second bag and between the second bag and the third bag respectively, opening a blasting valve between the second bag and the third bag by pressure after the grouting pressure reaches a certain value, filling the independent intervals between the second bag and the third bag by the cement slurry to form a solid sealing section, and finishing grouting;
④ . After 48h of grouting, the cement paste between the second bag and the third bag is solidified into a solid hole sealing section; the grouting pipe of the grouting liquid sealing device is connected with the grouting device, special liquid is injected into the independent space between the first bag and the second bag through the grouting pipe, the pressure is kept above 1MPa, a liquid sealing section is formed, and the grouting is finished.
The beneficial effects of the invention are as follows: 1. in the bottom plate rock roadway loosening ring, the bottom plate penetrating layer extraction drilling hole is sealed by adopting a solid-liquid two-phase sealing technology and a telescopic extraction pipe, the telescopic extraction pipe and a liquid hole sealing section are positioned in the bottom plate roadway rock stratum crack loosening ring, and the telescopic extraction pipe and the liquid hole sealing section are matched for use to adapt to deformation damage such as separation layer, dislocation and the like of roadway surrounding rock, so that the integrity of extraction pipe and hole sealing materials is ensured, and the liquid timely seals dynamic cracks formed, so that the sealing effect of the extraction drilling hole is improved; 2. in the bottom plate rock roadway loosening ring, the liquid hole sealing section keeps certain pressure, the pressure of liquid is higher than the air pressure in the roadway, the liquid adapts to the dynamic change of the roadway rock stratum crack loosening ring, and the liquid can timely seal cracks formed by dynamic damage of the rock stratum and permeate to the periphery to form a liquid isolation screen, so that the migration of roadway air to a negative pressure extraction area is blocked.
Drawings
FIG. 1 is a schematic diagram of a specific application of the present invention;
FIG. 2 is a schematic diagram of the grouting and grouting hole sealer in FIG. 1;
FIG. 3 is a cross-sectional view of the first pouch of FIG. 2;
Fig. 4 is a schematic structural view of the telescopic extraction pipe in fig. 1.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 4. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are otherwise, required to achieve the objective and effect taught by the invention. In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not to indicate or imply that the apparatus or elements to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention, nor to limit the scope of the present invention which can be implemented, but rather, the change or adjustment of the relative relationships thereof without substantial change of technical content should be regarded as the scope of the present invention which can be implemented. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 shows a specific installation schematic of the invention, wherein 7 is a floor rock roadway, 8 is a coal seam, and 9 is a roadway rock fracture loosening ring.
The invention relates to a dynamic self-adaptive hole sealing device for a coal seam bottom plate penetrating hole, which comprises extraction pipes and grouting hole sealing devices 2 which are arranged side by side, wherein the extraction pipes are telescopic extraction pipes 1, each telescopic extraction pipe 1 comprises a first extraction pipe 11, a second extraction pipe 12 and a sealing pipe 13, the rear end of each first extraction pipe 11 and the front end of each second extraction pipe 12 are connected through the corresponding sealing pipe 13, the sealing pipe 13 is sleeved outside the joint of each first extraction pipe 11 and each second extraction pipe 12, the diameters of the first extraction pipes 11 and the second extraction pipes 12 are the same, the diameters of the sealing pipes 13 are larger than the diameters of the first extraction pipes 11 and the second extraction pipes 12, the second extraction pipes 12 are fixedly connected with the corresponding sealing pipes 13 in a sealing mode, in the embodiment, the second extraction pipes 12 and the sealing pipes 13 can be fixedly connected in a sealing mode through sealing glue, the second extraction pipes 12 and the sealing pipes 13 can be integrally manufactured, and the first extraction pipes 11 are slidably connected in a sealing mode.
In this embodiment, a sealing ring assembly for ensuring tightness is arranged between the first extraction pipe 11 and the sealing pipe 13, the sealing ring assembly is sleeved outside the first extraction pipe 11 and comprises a first sealing ring 14, a second sealing ring 15 and a third sealing ring 16, a first groove 17 and a second groove 18 for placing the first sealing ring 14 and the second sealing ring 15 are formed in the inner side of the sealing pipe 13, and a third groove 19 for placing the third sealing ring 16 is formed in the front end of the first extraction pipe 11.
The rear end of the second extraction tube 12 is provided with a plurality of small holes 121.
The grouting liquid hole sealer 2 comprises a grouting pipe 21, a grouting pipe 22, a first sac 23, a second sac 24 and a third sac 25 which are sequentially and fixedly connected to the grouting pipe 21, a plug 29 is arranged at the rear end of the front end opening of the grouting pipe 21, a grouting valve 33 is arranged at the front end of the grouting pipe 21, a first unidirectional grouting assembly 26, a second unidirectional grouting assembly 27 and a third unidirectional grouting assembly 28 which are used for controlling grouting to the first sac 23, the second sac 24 and the third sac 25 are arranged on the grouting pipe 21, and a blasting valve 30 is arranged on the grouting pipe 21 between the second sac 24 and the third sac 25; the liquid injection pipe 22 and the grouting pipe 21 are arranged side by side, the front end and the rear end of the liquid injection pipe 22 are both open, the front end of the liquid injection pipe 22 is provided with a liquid injection valve 34, the liquid injection pipe 22 passes through the space between the first bag 23 and the grouting pipe 21, the rear end opening of the liquid injection pipe 22 is arranged between the first bag 23 and the second bag 24, and the telescopic extraction pipe 1 and the grouting pipe 21 are wrapped by the first bag 23, the second bag 24 and the third bag 25.
The first unidirectional grouting assembly 26 is arranged in the first pocket 23 in a sealing manner, the second unidirectional grouting assembly 27 is arranged in the second pocket 24 in a sealing manner, and the third unidirectional grouting assembly 28 is arranged in the third pocket 25 in a sealing manner.
The first unidirectional grouting assembly 26, the second unidirectional grouting assembly 27 and the third unidirectional grouting assembly 28 have the same structure and comprise grouting sleeves 3, grouting holes 4 are formed in the grouting pipe 21 at positions corresponding to the first capsular bag 23, the second capsular bag 24 and the third capsular bag 25, and the grouting sleeves 3 are sleeved on the grouting pipe 21 at positions corresponding to the grouting holes 4.
Both ends of the first bladder 23, the second bladder 24 and the third bladder 25 are fixed to the grouting pipe 21 by the bladder collar 5.
The hole sealing method of the hole sealing device comprises the following steps:
① . Constructing a floor penetrating drill hole 6 from a floor rock roadway 7 to a coal seam 8;
② . After the construction of the bottom plate through-layer drilling hole 6 is finished, selecting a telescopic extraction pipe 1 with proper length and a grouting and liquid injection hole sealer 2 according to the drilling construction depth, combining the two, and placing the two at a preset position in the bottom plate through-layer drilling hole 6; at the same time, the sealing tube 13 of the telescopic extraction tube 1 is ensured to be positioned between the first bag 23 and the second bag 24 of the grouting liquid sealing device 2;
③ . The grouting pipe 21 of the grouting hole sealer 2 is connected with a grouting device, the prepared cement slurry is injected into a drilled hole, under the action of grouting pressure, the first unidirectional grouting assembly 26, the second unidirectional grouting assembly 27 and the third unidirectional grouting assembly 28 are all opened, cement slurry is injected into the grouting of the first bag 23, the second bag 24 and the third bag 25, the bags are expanded, independent intervals are respectively formed between the first bag 23 and the second bag 24 and between the second bag 24 and the third bag 25, after grouting pressure reaches a certain value, the explosion valve 30 between the second bag 24 and the third bag 25 is opened by pressure, the independent intervals between the second bag 24 and the third bag 25 are filled with the cement slurry, a solid hole sealing section 31 is formed, and grouting is finished;
④ . After 48h grouting, the cement paste between the second pocket 24 and the third pocket 25 is solidified into a solid hole sealing section 31; the grouting pipe 22 of the grouting and grouting hole sealing device 2 is connected with a grouting device, special liquid is injected into the independent interval between the first bag 23 and the second bag 24 through the grouting pipe 22, the pressure is kept above 1MPa, a liquid hole sealing section 32 is formed, and the grouting is finished.
The hole sealing parameters mainly refer to the length of the solid hole sealing section 31 and the length of the liquid hole sealing section 32, the length of the solid hole sealing section 31 is generally 5m, and the solid hole sealing section is positioned outside the roadway rock stratum crack loosening ring 9 and is not influenced by deformation damage such as separation layer and dislocation of the roadway rock stratum; the length of the liquid hole sealing section 32 is larger than or equal to the size of the roadway rock stratum crack loosening ring 9, and is generally 10m, and in the roadway rock stratum crack loosening ring 9, the liquid sealing is suitable for deformation damage such as separation layer and dislocation of the roadway rock stratum, so that the integrity of the liquid hole sealing section 32 can be ensured, and dynamic cracks in the roadway rock stratum crack loosening ring 9 can be plugged in time.
The sealing of the bottom plate through-layer drilling hole 6 is completed through the above process, and the dynamic self-adaptive hole sealing device and method for the bottom plate through-layer drilling hole 6 are formed. In the extraction service period of the bottom plate penetrating drill hole 6, the liquid pressure in the liquid hole sealing section 8 is observed at regular time, and when the liquid pressure is lower than 1MPa, liquid injection and pressurization are carried out in time, so that the sealing under pressure is maintained.
The principle of the invention is as follows: (1) After the rock roadway is excavated, under the action of mine pressure, roadway surrounding rock, a roof plate and the like are deformed in a separation mode, a roadway rock stratum crack loosening ring 9 is formed around the roadway, and the deformation is gradually increased along with the extension of time; (2) The bottom plate penetrating drill hole 6 is matched with the telescopic extraction pipe 1 through a solid-liquid two-phase sealing technology, is suitable for deformation damage such as separation layer and dislocation of roadway surrounding rock, ensures the integrity of the telescopic extraction pipe 1 and hole sealing materials, and timely seals dynamic cracks formed by liquid, so that the sealing effect of the extraction drill hole is improved; (3) The roadway rock stratum crack loosening ring 9 is filled with liquid with certain pressure, the pressure of the liquid is higher than the air pressure in the roadway, and the migration of roadway air to the negative pressure extraction area is blocked.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a coal seam bottom plate wears layer drilling developments self-adaptation hole sealing device which characterized in that: the grouting hole sealer comprises a grouting pipe, a first bag, a second bag and a third bag which are sequentially and fixedly connected to the grouting pipe, wherein a plug is arranged at the rear end of an opening at the front end of the grouting pipe, a first unidirectional grouting component, a second unidirectional grouting component and a third unidirectional grouting component which are used for controlling grouting to the first bag, the second bag and the third bag are arranged on the grouting pipe, and a blasting valve is arranged on the grouting pipe between the second bag and the third bag; the liquid injection pipe and the grouting pipe are arranged side by side, the front end and the rear end of the liquid injection pipe are both open, the liquid injection pipe passes through the space between the first bag and the grouting pipe, and the rear end opening of the liquid injection pipe is arranged between the first bag and the second bag; the telescopic extraction pipe and the grouting pipe are wrapped by the first bag, the second bag and the third bag;
The extraction pipes are telescopic extraction pipes, the telescopic extraction pipes comprise a first extraction pipe, a second extraction pipe and a sealing pipe, the rear end of the first extraction pipe is connected with the front end of the second extraction pipe through the sealing pipe, the sealing pipe is sleeved outside the joint of the first extraction pipe and the second extraction pipe, the diameters of the first extraction pipe and the second extraction pipe are the same, the diameter of the sealing pipe is larger than that of the first extraction pipe and the second extraction pipe, the second extraction pipe is fixedly connected with the sealing pipe in a sealing way, and the first extraction pipe is connected with the sealing pipe in a sealing sliding way;
A sealing ring assembly for ensuring tightness is arranged between the first extraction pipe and the sealing pipe, the sealing ring assembly is sleeved outside the first extraction pipe and comprises a first sealing ring, a second sealing ring and a third sealing ring, a first groove and a second groove for placing the first sealing ring and the second sealing ring are formed in the inner side of the sealing pipe, and a third groove for placing the third sealing ring is formed in the front end of the first extraction pipe;
The sealing tube of the telescopic extraction tube is positioned between the first bag and the second bag of the grouting liquid sealing device;
the telescopic extraction pipe and the liquid hole sealing section are positioned in a crack loosening ring of the floor tunnel rock stratum.
2. The dynamic self-adaptive hole sealing device for coal seam floor penetrating drilling according to claim 1, wherein the device comprises: the rear end of the second extraction pipe is provided with a plurality of small holes.
3. The dynamic self-adaptive hole sealing device for coal seam floor penetrating drilling according to claim 2, wherein the device comprises: the first unidirectional grouting component is arranged in the first bag in a sealing mode, the second unidirectional grouting component is arranged in the second bag in a sealing mode, and the third unidirectional grouting component is arranged in the third bag in a sealing mode.
4. A dynamic adaptive hole sealing device for a coal seam floor penetrating drill hole according to any one of claims 1 to3, wherein: the structure of the first unidirectional grouting component, the second unidirectional grouting component and the third unidirectional grouting component are the same, the grouting device comprises grouting sleeves, grouting holes are formed in positions, corresponding to the first bag, the second bag and the third bag, on the grouting pipe, and the grouting sleeves are sleeved on the grouting pipe and correspond to the grouting holes.
5. The dynamic self-adaptive hole sealing device for coal seam floor penetrating drilling of claim 4, wherein the device comprises: the two ends of the first bag, the second bag and the third bag are fixed on the grouting pipe through bag pipe hoops.
6. The sealing method of the sealing device according to claim 5, comprising the steps of:
① . Drilling holes in the coal seam construction floor through the floor rock roadway;
② . After the bottom plate layer-penetrating drilling is finished, a telescopic extraction pipe with proper length and a grouting and liquid injection hole sealer are selected according to the drilling construction depth, and are combined together and placed at a preset position in the bottom plate layer-penetrating drilling; meanwhile, a sealing tube of the telescopic extraction tube is ensured to be positioned between a first bag and a second bag of the grouting liquid injection hole sealer;
③ . Connecting a grouting pipe of a grouting liquid sealing device with a grouting device, injecting prepared cement slurry into a drilled hole, opening a first unidirectional grouting assembly, a second unidirectional grouting assembly and a third unidirectional grouting assembly under the action of grouting pressure, injecting the cement slurry into a first bag, a second bag and a third bag to expand the bags, forming independent intervals between the first bag and the second bag and between the second bag and the third bag respectively, opening a blasting valve between the second bag and the third bag by pressure after the grouting pressure reaches a certain value, filling the independent intervals between the second bag and the third bag by the cement slurry to form a solid sealing section, and finishing grouting;
④ . After 48h of grouting, the cement paste between the second bag and the third bag is solidified into a solid hole sealing section; the grouting pipe of the grouting liquid sealing device is connected with the grouting device, special liquid is injected into the independent space between the first bag and the second bag through the grouting pipe, the pressure is kept above 1MPa, a liquid sealing section is formed, and the grouting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270733.5A CN108278096B (en) | 2018-03-29 | 2018-03-29 | Dynamic self-adaptive hole sealing device and method for coal seam floor penetrating drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270733.5A CN108278096B (en) | 2018-03-29 | 2018-03-29 | Dynamic self-adaptive hole sealing device and method for coal seam floor penetrating drilling |
Publications (2)
| Publication Number | Publication Date |
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| CN108278096A CN108278096A (en) | 2018-07-13 |
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| CN108868875B (en) * | 2018-08-14 | 2023-11-21 | 山西潞安晋安矿业工程有限责任公司 | Secondary grouting gas hole sealing device with pressure and construction method thereof |
| CN110173231A (en) * | 2019-07-08 | 2019-08-27 | 中煤科工集团重庆研究院有限公司 | Long-distance downward drilling segmented compact hole sealing pressure measuring device and method |
| CN110984906A (en) * | 2019-11-13 | 2020-04-10 | 山西晋煤集团技术研究院有限责任公司 | Long-distance pressure measuring hole with-pressure grouting hole sealing method |
| CN111894659A (en) * | 2020-09-07 | 2020-11-06 | 中煤能源研究院有限责任公司 | Full-automatic dynamic hole sealing system |
| CN112761574A (en) * | 2021-03-03 | 2021-05-07 | 河南理工大学 | Tire bag type anti-slip hole packer for gas extraction drilling of bottom suction roadway |
| CN112922561A (en) * | 2021-03-03 | 2021-06-08 | 河南理工大学 | Gas extraction drilling hole sealing method for underground bottom suction roadway of coal mine |
| CN113605961B (en) * | 2021-08-12 | 2023-07-14 | 煤炭科学技术研究院有限公司 | Underground coal mine gas injection displacement injection and extraction dual-purpose recoverable hole sealing device and method |
| CN117127967B (en) * | 2023-09-27 | 2024-08-13 | 平顶山天安煤业股份有限公司勘探工程处 | System and method for detecting coal seam drilling gas extraction leakage point |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195390A (en) * | 2013-04-10 | 2013-07-10 | 山西潞安环保能源开发股份有限公司 | Mining-coal bed nearly horizontal gas extraction borehole sealing method |
| CN204312124U (en) * | 2014-12-15 | 2015-05-06 | 田晓健 | Gas drainage under suction telescoping tube |
| CN205297637U (en) * | 2016-01-12 | 2016-06-08 | 山东科技大学 | Recoverable gas intelligence drainage system based on drilling is formula developments hole sealing independently |
| CN107313799A (en) * | 2017-08-16 | 2017-11-03 | 阳泉科汇瓦斯检测技术有限公司 | A kind of sealing and leakage plugging device and method for gas pumping |
| CN208010311U (en) * | 2018-03-29 | 2018-10-26 | 焦作市美格安矿业科技有限公司 | A kind of seat earth layer-through drilling dynamic self-adapting hole sealing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140901B (en) * | 2011-05-13 | 2013-11-20 | 中国矿业大学 | High pressure resistant drilled hole sealing method |
| CN202417577U (en) * | 2012-01-09 | 2012-09-05 | 中国矿业大学 | Coal mine underground instantly-drawing gas extraction pipe |
| CN102996159B (en) * | 2012-12-03 | 2015-04-29 | 中国矿业大学 | Multiphase medium plugging device and method for gas extraction drill hole |
-
2018
- 2018-03-29 CN CN201810270733.5A patent/CN108278096B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195390A (en) * | 2013-04-10 | 2013-07-10 | 山西潞安环保能源开发股份有限公司 | Mining-coal bed nearly horizontal gas extraction borehole sealing method |
| CN204312124U (en) * | 2014-12-15 | 2015-05-06 | 田晓健 | Gas drainage under suction telescoping tube |
| CN205297637U (en) * | 2016-01-12 | 2016-06-08 | 山东科技大学 | Recoverable gas intelligence drainage system based on drilling is formula developments hole sealing independently |
| CN107313799A (en) * | 2017-08-16 | 2017-11-03 | 阳泉科汇瓦斯检测技术有限公司 | A kind of sealing and leakage plugging device and method for gas pumping |
| CN208010311U (en) * | 2018-03-29 | 2018-10-26 | 焦作市美格安矿业科技有限公司 | A kind of seat earth layer-through drilling dynamic self-adapting hole sealing device |
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