CN114483161A - Coal mine drilling gas spraying prevention device and construction method - Google Patents
Coal mine drilling gas spraying prevention device and construction method Download PDFInfo
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- CN114483161A CN114483161A CN202111640410.9A CN202111640410A CN114483161A CN 114483161 A CN114483161 A CN 114483161A CN 202111640410 A CN202111640410 A CN 202111640410A CN 114483161 A CN114483161 A CN 114483161A
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- 238000005553 drilling Methods 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 230000002265 prevention Effects 0.000 title claims abstract description 18
- 238000005507 spraying Methods 0.000 title claims description 5
- 239000000428 dust Substances 0.000 claims abstract description 112
- 238000000605 extraction Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 70
- 239000007921 spray Substances 0.000 claims description 27
- 239000002893 slag Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 5
- 239000007924 injection Substances 0.000 claims 5
- 239000002817 coal dust Substances 0.000 abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 11
- 230000003139 buffering effect Effects 0.000 description 4
- 239000003818 cinder Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
- E21B21/011—Dust eliminating or dust removing while drilling
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
- E21B21/015—Means engaging the bore entrance, e.g. hoods for collecting dust
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The application provides a colliery drilling gas orifice prevention device and construction method, wherein, colliery drilling gas orifice prevention device includes: the gas drainage device comprises a dust collection box, a gas drainage pipeline and a gas drainage pipeline, wherein a first connecting pipe and a second connecting pipe are respectively arranged on the dust collection box, the central axis of the first connecting pipe is superposed with the central axis of the second connecting pipe, and the top of the dust collection box is communicated with the gas drainage pipeline; the extraction pipe is arranged in a preset hole in the coal wall and is communicated with the first connecting pipe; the bottom intercommunication of collection sediment case, collection sediment case and dust collection box, this application compares the advantage that has with prior art is: when the gas emission amount is larger, the dust collection box can effectively buffer gas and coal dust, the gas and the coal dust are prevented from escaping, and the safety and the operation efficiency of the gas extraction drill hole are effectively improved.
Description
Technical Field
The application relates to the technical field of coal mine drilling, in particular to a coal mine drilling gas spray hole prevention device and a construction method.
Background
In the coal mine industry, gas extraction drilling is very common, when the gas extraction drilling construction is carried out, gas spray holes often appear or overflow to cause the problem of gas overrun and the like, the personal health and safety of operating personnel are seriously harmed, and moreover, the gas spray can carry a large amount of coal dust to cause the deterioration of the sanitary condition in a roadway and the low visibility of the leeward side, so that the operating efficiency is influenced.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the application aims to provide a coal mine drilling gas spray hole prevention device and a construction method.
In order to achieve the above object, the first aspect of the present application provides a coal mine drilling gas spray hole preventing device, including: the gas drainage device comprises a dust collection box, a gas drainage pipeline and a gas drainage pipeline, wherein a first connecting pipe and a second connecting pipe are respectively arranged on the dust collection box, the central axis of the first connecting pipe is superposed with the central axis of the second connecting pipe, and the top of the dust collection box is communicated with the gas drainage pipeline; the extraction pipe is arranged in a preset hole in the coal wall and is communicated with the first connecting pipe; and the slag collecting box is communicated with the bottom of the dust collecting box.
The gas-proof orifice device further comprises: the U-shaped pipe is arranged in the dust collection box and close to the first connecting pipe, and is communicated with a high-pressure water source; and the spray heads are arranged on the side surface of the U-shaped pipe close to the first connecting pipe.
The gas-proof orifice device further comprises: the gas-water separator is communicated with the top of the dust collection box, the gas-water separator is communicated with the gas drainage pipeline, and the gas drainage pipeline is communicated with the top of the dust collection box through the gas-water separator.
The gas-proof orifice device further comprises: the air bag is communicated with the top of the dust collection box, the air bag is communicated with the gas-water separator, and the gas-water separator is communicated with the top of the dust collection box through the air bag.
The gas-proof orifice device further comprises: the solid-liquid separator is communicated with the bottom of the dust collection box, the solid-liquid separator is communicated with the slag collection box, and the slag collection box is communicated with the bottom of the dust collection box through the solid-liquid separator.
The solid-liquid separator is communicated with the bottom of the dust collection box through a steel wire framework pipe.
The bottom of the dust collection box is provided with an inclined plane, and the inclined plane extends upwards in an inclined way through the communication part of the dust collection box and the slag collection box.
The extraction pipe is connected with the first connecting pipe through a clamping piece.
The application second aspect provides a colliery drilling gas prevention orifice construction method, includes: arranging a preset hole on the coal wall; arranging an extraction pipe in the preset hole; arranging a dust collection box close to the coal wall, wherein the dust collection box is respectively provided with a first connecting pipe and a second connecting pipe, and the central axis of the first connecting pipe is superposed with the central axis of the second connecting pipe; communicating the first connecting pipe with the extraction pipe; sequentially enabling a drill rod to penetrate through the second connecting pipe, the dust collection box, the first connecting pipe and the extraction pipe; communicating the top of the dust collection box with a gas drainage pipeline, and communicating the bottom of the dust collection box with a slag collection box; and drilling, and communicating the extraction pipe with a gas drainage pipeline after the drilling operation is finished.
When the drill rod is used for compressed air drilling construction, the construction method for preventing the gas spraying holes further comprises the following steps: a U-shaped pipe is arranged in the dust collection box and close to the first connecting pipe, wherein a plurality of spray heads are arranged on the side surface of the U-shaped pipe close to the first connecting pipe; and communicating the U-shaped pipe with a high-pressure water source.
After adopting above-mentioned technical scheme, this application compares advantage that has with prior art:
through the cooperation of dust collection box and taking out the drainage pipe, make to predetermine the hole appearance and form great buffering space, and through the cooperation of first connecting pipe and second connecting pipe, make the drilling rod can directly pass the dust collection box and carry out the drilling operation to when gas emission volume is great, the dust collection box can form effective buffering to gas and coal dust, avoids the loss of gas and coal dust, has effectively promoted the construction security and the operating efficiency of gas drainage drilling.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a coal mine drilling gas spray hole prevention device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a dust collection box in a coal mine drilling gas spray hole prevention device according to an embodiment of the present application;
FIG. 3 is a flow chart of a coal mine drilling gas-proof jet hole construction method according to an embodiment of the application;
as shown in the figure: 1. the gas-water separation device comprises a dust collection box, 2 a gas extraction pipe, 3 a slag collection box, 4 a preset hole, 5 a gas drainage pipeline, 6 a U-shaped pipe, 7 a spray head, 8 a gas-water separator, 9 a gas bag, 10 a solid-liquid separator, 11 a steel wire framework pipe, 12 a slope, 13 a first connecting pipe, 14 a second connecting pipe, 15 a drill rod, 16 and a hole sealing bag.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the relevant embodiment of this application, prevent that gas orifice device includes the hemisphere cover body, the hemisphere cover body hangs on the coal wall through wire rope etc. and the hemisphere cover body is detained 4 departments of predetermineeing in the coal wall, drilling rod 15 passes the hemisphere cover body and carries out the drilling operation, this kind of mode of setting is comparatively suitable for when gas emission volume is less, nevertheless when gas emission volume is great, gas carries a large amount of coal dust blowout in the twinkling of an eye, the impact force is very big, lead to the unable performance of hemisphere cover body.
As shown in fig. 1 and 2, the embodiment of the application provides a coal mine drilling gas spray hole prevention device, which comprises a dust collection box 1, an extraction pipe 2 and a slag collection box 3, wherein the dust collection box 1 is provided with a first connecting pipe 13 and a second connecting pipe 14 respectively, a central axis of the first connecting pipe 13 coincides with a central axis of the second connecting pipe 14, the top of the dust collection box 1 is communicated with a gas drainage pipeline 5, the extraction pipe 2 is arranged in a preset hole 4 on a coal wall, the extraction pipe 2 is communicated with the first connecting pipe 13, and the slag collection box 3 is communicated with the bottom of the dust collection box 1.
It can be understood that a larger buffer space is formed outside the preset hole 4 through the matching of the dust collection box 1 and the extraction pipe 2, and the drill rod 15 can directly penetrate through the dust collection box 1 to perform drilling operation through the matching of the first connecting pipe 13 and the second connecting pipe 14, so that when the gas emission amount is larger, the dust collection box 1 can effectively buffer gas and coal dust, the gas and coal dust are prevented from escaping, and the construction safety and the operation efficiency of gas extraction drilling are effectively improved;
receive the cinder of dust collection box 1 in through collection sediment case 3 etc. guarantee to keep great buffer space in the dust collection box 1 when collecting the cinder, guarantee that dust collection box 1 is to the effective buffering of gas and coal dust, draw the gas in the dust collection box 1 through gas drainage pipeline 5, avoid predetermineeing the gas loss in the hole 4 when collecting the gas, guarantee holistic security.
It should be noted that the gas drainage pipeline 5 is used for collecting gas, and has a negative pressure therein, and after the gas drainage pipeline 5 is communicated with the dust collection box 1, the gas in the dust collection box 1 enters the gas drainage pipeline 5 due to the negative pressure.
As shown in fig. 1, in some embodiments, the dust box 1 is provided with a plurality of support legs, and the dust box 1 can be directly placed in the preset holes 4 of the coal wall through the arrangement of the support legs, so that the dust box 1 can be conveniently arranged and dismantled, and the overall dismounting efficiency is improved.
In some embodiments, the legs may be fixed to the floor or coal wall of the roadway by bolts or the like to secure the stability of the dust box 1 while facilitating the disassembly and assembly of the dust box 1.
When the hole is drilled, compressed air construction or pressurized water construction can be adopted, wherein when the compressed air construction is adopted, in some embodiments, the gas spray hole prevention device further comprises a U-shaped pipe 6 and a plurality of spray heads 7, the U-shaped pipe 6 is arranged in the dust collection box 1 and close to the first connecting pipe 13, the U-shaped pipe 6 is communicated with a high-pressure water source, and the spray heads 7 are arranged on the side face, close to the first connecting pipe 13, of the U-shaped pipe 6.
It can be understood that the high-pressure water source pressurizes water and then conveys the water into the U-shaped pipe 6 and sprays the water out through the plurality of nozzles 7, so that a large amount of water mist is formed at the first connecting pipe 13 in the dust collecting box 1, and the water mist settles coal dust sprayed out from the preset holes 4, so as to realize the dust removal of gas.
In some embodiments, the extraction pipe 2 is provided with a ball valve to realize connection and disconnection between the extraction pipe 2 and the dust collection box 1, so that the extraction pipe 2 is directly communicated with the gas drainage pipeline 5 after the drilling operation is completed, and the gas in the preset hole 4 is prevented from overflowing.
In some embodiments, as shown in fig. 1, a large drill bit is used to set the preset hole 4, after the depth of the preset hole 4 reaches a preset value, the drill rod is withdrawn, the hole sealing bags 16 are bound at two ends of the extraction pipe 2 and sent into the preset hole 4, and then hole sealing grouting is performed.
It can be understood that through the arrangement of the hole sealing bag 16, the sealing between the extraction pipe 2 and the preset hole 4 is ensured, and the escape of gas and coal dust at the preset hole 4 is avoided.
In some embodiments, the two one-shot hole sealing bladder 16 may be a mine hole sealer model FKJW-50/0.8.
In some embodiments, the high pressure water source may include a water tank filled with water and a water pump having a water inlet communicated with a water outlet of the water tank and a water outlet communicated with a water inlet of the U-shaped pipe 6, so that the water in the water tank is sprayed by the spray head 7 after the water pump is turned on.
In some embodiments, as shown in fig. 2, the U-shaped opening of the U-shaped pipe 6 faces downward, and the plurality of nozzles 7 are uniformly distributed on the side of the U-shaped pipe 6 close to the first connecting pipe 13.
As shown in fig. 1, in some embodiments, the gas spray hole prevention device further includes a gas-water separator 8, the gas-water separator 8 is communicated with the top of the dust box 1, the gas-water separator 8 is communicated with the gas drainage pipeline 5, and the gas drainage pipeline 5 is communicated with the top of the dust box 1 through the gas-water separator 8.
It can be understood that the inlet of the gas-water separator 8 is communicated with the top of the dust collection box 1, the gas outlet of the gas-water separator 8 is communicated with the gas drainage pipeline 5, and when gas with high water content in the dust collection box 1 passes through the gas-water separator 8, more water in the gas is removed, so that the water content in the gas is effectively reduced.
In some embodiments, the water outlet of the gas-water separator 8 can be communicated with a water tank of a high-pressure water source and also can be communicated with an external water storage device.
As shown in fig. 1, in some embodiments, the gas spray hole prevention device further includes an air bag 9, the air bag 9 is communicated with the top of the dust box 1, the air bag 9 is communicated with the gas-water separator 8, and the gas-water separator 8 is communicated with the top of the dust box 1 through the air bag 9.
It can be understood that one port of the air bag 9 is communicated with the top of the dust collection box 1, and the other port of the air bag 9 is communicated with the inlet of the gas-water separator 8, so that gas in the dust collection box 1 sequentially passes through the air bag 9 and the gas-water separator 8 and then enters the gas drainage pipeline 5, and the gas in the dust collection box 1 can be effectively buffered after entering the air bag 9 through the deformation of the air bag 9 and the matching of negative pressure in the gas drainage pipeline 5, and the overall safety is further improved.
The deformation characteristic of the airbag 9 means that the airbag 9 can deform according to the pressure of gas therein.
In some embodiments, ball valves are arranged between the communication between the air bag 9 and the dust collection box 1 and between the communication between the gas-water separator 8 and the gas drainage pipeline 5, so as to realize the connection and disconnection between the air bag 9 and the dust collection box 1 and between the gas-water separator 8 and the gas drainage pipeline 5.
As shown in fig. 1, in some embodiments, the gas spray hole preventing device further includes a solid-liquid separator 10, the solid-liquid separator 10 is communicated with the bottom of the dust box 1, the solid-liquid separator 10 is communicated with the slag collecting box 3, and the slag collecting box 3 is communicated with the bottom of the dust box 1 through the solid-liquid separator 10.
It can be understood that the inlet of the solid-liquid separator 10 is communicated with the bottom of the dust collection box 1, the slag outlet of the solid-liquid separator 10 is communicated with the slag collection box 3, and when the coal slag containing a large amount of water in the dust collection box 1 passes through the solid-liquid separator 10, more water in the coal slag is removed, so that the water content in the coal slag is effectively reduced.
In some embodiments, the water outlet of the solid-liquid separator 10 may be in communication with an external water storage device.
As shown in fig. 1, in some embodiments, the solid-liquid separator 10 communicates with the bottom of the dust box 1 through a wire skeleton tube 11.
It can be understood that the solid-liquid separator 10 is communicated with the dust collection box 1 through the steel wire framework pipe 11, and meanwhile, the solid-liquid separator 10 is communicated with the dust collection box 1, flame retardance and static electricity resistance can be achieved, so that the overall safety is improved.
In some embodiments, as shown in fig. 2, the bottom of the dust bin 1 is provided with a bevel 12, which bevel 12 extends obliquely upwards via the connection of the dust bin 1 with the slag bin 3.
It can be understood that the arrangement of the inclined plane 12 enables the coal slag containing a large amount of water in the dust collection box 1 to smoothly enter the solid-liquid separator 10, thereby reducing the blockage in the dust collection box 1.
As shown in fig. 2, in some embodiments, the first connecting pipe 13 is located in the dust box 1, the second connecting pipe 14 is located in the dust box 1, and one end of the extraction pipe 2 is inserted into the first connecting pipe 13, so as to communicate the extraction pipe 2 with the first connecting pipe 13.
In some embodiments, the extraction pipe 2 is connected with the first connecting pipe 13 through a clamping piece.
It can be understood that, through the arrangement of the clamping piece, the pumping pipe 2 and the first connecting pipe 13 are connected and separated conveniently while the pumping pipe 2 and the first connecting pipe 13 are stably connected, and the overall disassembly and assembly efficiency is improved.
In some embodiments, the snap members may be clips, snaps, or the like.
In some embodiments, a sealing member is provided within the second connecting pipe 14 to seal the drill rod 15 from the second connecting pipe 14 when the drill rod 15 passes through the second connecting pipe 14.
As shown in fig. 3, an embodiment of the present application further provides a coal mine drilling gas-proof spraying hole construction method, including:
s1: arranging a preset hole 4 on the coal wall;
s2: arranging the extraction pipe 2 in a preset hole 4;
s3: a dust collection box 1 is arranged at a position close to the coal wall, wherein a first connecting pipe 13 and a second connecting pipe 14 are respectively arranged on the dust collection box 1, and the central axis of the first connecting pipe 13 is superposed with the central axis of the second connecting pipe 14;
s4: the first connecting pipe 13 is communicated with the extraction pipe 2;
s5: the drill rod 15 sequentially passes through the second connecting pipe 14, the dust collection box 1, the first connecting pipe 13 and the extraction pipe 2;
s6: the top of the dust collection box 1 is communicated with a gas drainage pipeline 5, and the bottom of the dust collection box 1 is communicated with a slag collection box 3;
s7: and (4) performing drilling operation, and communicating the extraction pipe 2 with the gas drainage pipeline 5 after the drilling operation is finished.
It can be understood that a larger buffer space is formed outside the preset hole 4 through the matching of the dust collection box 1 and the extraction pipe 2, and the drill rod 15 can directly penetrate through the dust collection box 1 to perform drilling operation through the matching of the first connecting pipe 13 and the second connecting pipe 14, so that when the gas emission amount is larger, the dust collection box 1 can effectively buffer gas and coal dust, the gas and coal dust are prevented from escaping, and the construction safety and the operation efficiency of gas extraction drilling are effectively improved;
receive the cinder of dust collection box 1 in through collection sediment case 3 etc. guarantee to keep great buffer space in the dust collection box 1 when collecting the cinder, guarantee that dust collection box 1 is to the effective buffering of gas and coal dust, draw the gas in the dust collection box 1 through gas drainage pipeline 5, avoid predetermineeing the gas loss in the hole 4 when collecting the gas, guarantee holistic security.
In some embodiments, step S1: the step of providing the preset holes 4 in the coal wall comprises:
s11: connecting the drill rod 15 to the drill bit;
s12: the coal wall is drilled by a drill to form the predetermined holes 4.
In some embodiments, the drill bit has an outer diameter of 130mm, the drill rod 15 has an outer diameter of 75mm, and the depth of the preset hole 4 is 8m, i.e., when the depth of the preset hole 4 reaches 8m during the drilling operation, the drill rod 15 is withdrawn from the preset hole 4.
In some embodiments, step S2: arranging the extraction pipe 2 in the preset hole 4 comprises:
s21: binding the hole sealing bag 16 at two ends of the extraction pipe 2;
s22: the extraction pipe 2 is placed in the preset hole 4, and the extraction pipe 2 is exposed out of the coal wall for a certain distance;
s23: and grouting into the hole sealing bag 16 until the extraction pipe 2 is sealed with the preset hole 4.
It can be understood that the sealing between the extraction pipe 2 and the preset hole 4 is ensured through the arrangement of the hole sealing bag 16, the gas and the coal dust are prevented from escaping from the preset hole 4, and meanwhile, the extraction pipe 2 is exposed out of the coal wall for a certain distance, so that the extraction pipe 2 is conveniently communicated with the first connecting pipe 13.
In some embodiments, the length of the extraction pipe 2 is 8m, the outer diameter of the extraction pipe 2 is 110mm, and the distance of the extraction pipe 2 exposed out of the coal wall is 15cm-20 cm.
In some embodiments, at step S5: before the drill rod 15 sequentially passes through the second connecting pipe 14, the dust collection box 1, the first connecting pipe 13 and the extraction pipe 2, and after the drill rod 15 exits the preset hole 4, the drill bit needs to be replaced.
In some embodiments, the replacement bit has an outer diameter of 94 mm.
In some embodiments, when the drill rod 15 is used for drilling a compressed air hole, the method for constructing the gas-proof nozzle hole further includes:
a U-shaped pipe 6 is arranged in the dust collection box 1 and close to the first connecting pipe 13, wherein a plurality of spray heads 7 are arranged on the side surface of the U-shaped pipe 6 close to the first connecting pipe 13;
the U-shaped pipe 6 is communicated with a high-pressure water source.
It can be understood that the high pressure water source pressurizes the water and delivers the pressurized water to the U-shaped pipe 6 and sprays the pressurized water through the plurality of nozzles 7, so that a large amount of water mist is formed at the first connecting pipe 13 in the dust box 1, and the water mist settles the sprayed coal dust.
In some embodiments, the extraction pipe 2 is provided with a ball valve, and in step S7, after the drilling operation is completed, communicating the extraction pipe 2 with the gas drainage pipeline 5 includes:
s71: after the drilling operation is finished, closing the ball valve;
s72: separating the extraction pipe 2 from the first connecting pipe 13;
s73: the extraction pipe 2 is communicated with a gas drainage pipeline 5;
s74: the ball valve is opened.
The on-off between the extraction pipe 2 and the dust collection box 1 can be realized through the switch of the ball valve, so that the extraction pipe 2 and the gas drainage pipeline 5 can be directly communicated after the drilling operation is completed, and the safety of gas extraction is improved.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The utility model provides a colliery drilling gas orifice device of preventing which characterized in that includes:
the gas drainage device comprises a dust collection box, a gas drainage pipeline and a gas drainage pipeline, wherein a first connecting pipe and a second connecting pipe are respectively arranged on the dust collection box, the central axis of the first connecting pipe is superposed with the central axis of the second connecting pipe, and the top of the dust collection box is communicated with the gas drainage pipeline;
the extraction pipe is arranged in a preset hole in the coal wall and is communicated with the first connecting pipe;
and the slag collecting box is communicated with the bottom of the dust collecting box.
2. The coal mine drilling gas injection prevention device of claim 1, further comprising:
the U-shaped pipe is arranged in the dust collection box and close to the first connecting pipe, and is communicated with a high-pressure water source;
and the spray heads are arranged on the side surface of the U-shaped pipe close to the first connecting pipe.
3. The coal mine drilling gas injection prevention device of claim 2, further comprising:
the gas-water separator is communicated with the top of the dust collection box, the gas-water separator is communicated with the gas drainage pipeline, and the gas drainage pipeline is communicated with the top of the dust collection box through the gas-water separator.
4. The coal mine drilling gas injection prevention device of claim 3, further comprising:
the air bag is communicated with the top of the dust collection box, the air bag is communicated with the gas-water separator, and the gas-water separator is communicated with the top of the dust collection box through the air bag.
5. The coal mine drilling gas injection prevention device of claim 1, further comprising:
the solid-liquid separator is communicated with the bottom of the dust collection box, the solid-liquid separator is communicated with the slag collection box, and the slag collection box is communicated with the bottom of the dust collection box through the solid-liquid separator.
6. The coal mine drilling gas spray hole prevention device according to claim 5, wherein the solid-liquid separator is communicated with the bottom of the dust collection box through a steel wire framework pipe.
7. The coal mine drilling gas spray hole preventing device as recited in any one of claims 1 to 6, wherein a slope is provided at a bottom of the dust box, and the slope extends obliquely upward through a communication part of the dust box and the slag collection box.
8. The coal mine drilling gas injection hole preventing device according to any one of claims 1 to 6, wherein the extraction pipe is connected with the first connecting pipe through a clamping piece.
9. A coal mine drilling gas-proof spraying hole construction method is characterized by comprising the following steps:
arranging a preset hole on the coal wall;
arranging an extraction pipe in the preset hole;
arranging a dust collection box close to the coal wall, wherein the dust collection box is respectively provided with a first connecting pipe and a second connecting pipe, and the central axis of the first connecting pipe is superposed with the central axis of the second connecting pipe;
communicating the first connecting pipe with the extraction pipe;
sequentially enabling a drill rod to penetrate through the second connecting pipe, the dust collection box, the first connecting pipe and the extraction pipe;
communicating the top of the dust collection box with a gas drainage pipeline, and communicating the bottom of the dust collection box with a slag collection box;
and drilling, and communicating the extraction pipe with a gas drainage pipeline after the drilling operation is finished.
10. The coal mine drilling gas-spray hole preventing construction method according to claim 9, wherein when the drill rod is used for compressed air drilling, the gas-spray hole preventing construction method further comprises the following steps:
a U-shaped pipe is arranged in the dust collection box and close to the first connecting pipe, wherein a plurality of spray heads are arranged on the side surface of the U-shaped pipe close to the first connecting pipe;
and communicating the U-shaped pipe with a high-pressure water source.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199234A (en) * | 2022-07-15 | 2022-10-18 | 中国矿业大学 | Embedded intelligent vibration blowout hole preventing system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199234A (en) * | 2022-07-15 | 2022-10-18 | 中国矿业大学 | Embedded intelligent vibration blowout hole preventing system and method |
| CN115199234B (en) * | 2022-07-15 | 2023-09-19 | 中国矿业大学 | Embedded intelligent vibration anti-spraying hole system and method |
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