CN210239733U - Fire prevention and extinguishing system of coal goaf - Google Patents
Fire prevention and extinguishing system of coal goaf Download PDFInfo
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- CN210239733U CN210239733U CN201920893889.9U CN201920893889U CN210239733U CN 210239733 U CN210239733 U CN 210239733U CN 201920893889 U CN201920893889 U CN 201920893889U CN 210239733 U CN210239733 U CN 210239733U
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- 230000002265 prevention Effects 0.000 title claims abstract description 113
- 239000003245 coal Substances 0.000 title claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 85
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 238000005065 mining Methods 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 9
- 239000011440 grout Substances 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model relates to a coal collecting space area's fire prevention and extinguishing systems, include: the liquid fire prevention and extinguishing material injection chamber is positioned in the middle of the return airway of the mining area; a first drilling hole is arranged from the ground surface to a return airway of a mining area; the liquid fire prevention and extinguishing material vertical pipe is arranged in the first drilling hole and communicated with the liquid fire prevention and extinguishing material chamber; the liquid fire prevention and extinguishing material injection pipeline comprises a first pipeline, a second pipeline and a third pipeline which are communicated; the first pipeline is laid along a return airway of the mining area and is connected with the liquid-state fire prevention and extinguishing material vertical pipe; the second pipeline is laid along the coal face air return connection roadway; a third pipeline is laid along the return airway of the working face; the tail end of the third pipeline is connected with a first branch pipe, and the first branch pipe extends to the goaf; the tail end of the first branch pipe is connected with a first liquid outlet pipe, the first liquid outlet pipe is laid on a bottom plate of the goaf along the inclined direction of the coal face, and at least 1 first liquid outlet is formed. The utility model discloses can be with the ejection of compact on a large scale of the material of putting out a fire of preventing in collecting space area, the range of action is big, and the effect of preventing and putting out a fire is good.
Description
Technical Field
The utility model belongs to the colliery field, in particular to coal collecting space area's fire prevention and extinguishing system.
Background
In the coal mining process, if coal is left in the goaf, spontaneous combustion is easy to occur, and the fire risk is large. Particularly, the spontaneous combustion period of the coal bed and the spontaneous combustion coal bed is 1-3 months, coal dust has explosion danger, and sometimes multiple spontaneous combustion phenomena occur during production and withdrawal, so that the potential danger is high. The traditional fire prevention and extinguishing method adopts means of grouting, nitrogen injection and the like, generally adopts a working face buried pipe mode of grouting and nitrogen injection during withdrawal, and only acts on a working face return airway and a goaf at a working face machine lane.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fire prevention and extinguishing systems in coal collecting space area, this fire prevention and extinguishing systems, the flow is simple, convenient operation, and can be with the ejection of compact of fire prevention and extinguishing materials in collecting space area incline direction to act on whole collecting space area, fire prevention and extinguishing effect is good.
The technical scheme of the utility model as follows:
a fire prevention and extinguishing system for a coal goaf, comprising:
the liquid fire prevention and extinguishing material injection chamber is positioned in the middle of a return airway of the mining area;
a first drill hole is arranged from the ground surface to the return airway of the mining area;
a liquid fire prevention and extinguishing material vertical pipe is arranged in the first drilling hole and communicated to the liquid fire prevention and extinguishing material chamber;
the liquid injection fire prevention material pipeline comprises a first pipeline, a second pipeline and a third pipeline;
the first pipeline is laid along a return airway of a mining area and is connected with the liquid-injection fire-fighting material vertical pipe through the liquid-injection fire-fighting material chamber;
the second pipeline is laid along the coal face return air connecting roadway and connected to the first pipeline;
the third pipeline is laid along the working face return airway and connected to the tail end of the second pipeline;
the tail end of the third pipeline is connected with a first branch pipe laid along the working face return airway, and the first branch pipe extends to a goaf along the working face return airway; the tail end of the first branch pipe is connected with a first liquid outlet pipe, and the first liquid outlet pipe is laid on a bottom plate of the goaf along the inclined direction of the coal face; at least 1 first liquid outlet is arranged on the first liquid outlet pipe.
Preferably, the distance between the first liquid outlet pipe and the stoping line is 25-42.5 m.
Preferably, the number of the first liquid outlets is 2-10, and the first liquid outlets are arranged on the first liquid outlet pipe at intervals.
Preferably, the end of the third pipeline is further connected with a second branch pipe laid along the working face return airway, and the second branch pipe extends to the goaf along the working face return airway; the tail end of the second branch pipe is connected with a second liquid outlet pipe, and the second liquid outlet pipe is laid on the bottom plate of the goaf along the inclined direction of the coal face; and at least 1 second liquid outlet is formed in the second liquid outlet pipe.
Preferably, the distance between the second liquid outlet pipe and the stopping production line is 25-42.5m, and the second liquid outlet pipe is at least 10m away from the first liquid outlet pipe.
Preferably, the number of the second liquid outlets is 2-10, and the second liquid outlets are arranged on the second liquid outlet pipe at intervals.
Preferably, the liquid injection fire prevention material pipeline further comprises a fourth pipeline, the fourth pipeline is laid along a wind tunnel below the coal face and is connected to the first pipeline; the air lane is a working face air intake lane or an adjacent coal face air return lane; the lower extreme in collecting space area is provided with 1 at least second drilling, the end of fourth pipeline be connected to respectively at least 1 second drilling.
Preferably, the number of the second drill holes is 3-5, and the second drill holes are arranged at intervals.
Preferably, the fire prevention and extinguishing system further comprises a grouting pipeline, wherein the grouting pipeline comprises a grouting main pipeline and a grouting branch pipeline; the grouting main pipeline is laid along the stope return airway and connected to a ground grouting workshop; the grouting branch pipeline is laid along the parking lot return air connecting roadway and the working face return air roadway in sequence, one end of the grouting branch pipeline is connected to the grouting main pipeline, and the other end of the grouting branch pipeline extends to the goaf.
Preferably, the fire prevention and extinguishing system further comprises a gaseous fire prevention and extinguishing material pipeline, wherein the gaseous fire prevention and extinguishing material pipeline comprises a main gaseous fire prevention and extinguishing material pipeline and a branch gaseous fire prevention and extinguishing material pipeline; the main pipeline of the gaseous fire prevention and extinguishing materials is laid along the return airway of the mining area and is connected to a ground nitrogen injection workshop; the gas fire prevention and extinguishing material branch pipeline is laid along a train yard return air connection roadway, a working face return air roadway, a working face measure roadway and a working face air inlet roadway in sequence, one end of the gas fire prevention and extinguishing material branch pipeline is connected to the gas fire prevention and extinguishing material main pipeline, and the other end of the gas fire prevention and extinguishing material branch pipeline extends to the goaf.
The beneficial effects of the utility model reside in that:
the fire prevention and extinguishing system of the coal goaf has simple flow and convenient operation, can discharge fire prevention and extinguishing materials in the oblique direction of the goaf and act on the whole goaf, and has good fire prevention and extinguishing effect; and the fire prevention and extinguishing materials can be discharged from a plurality of areas in the inclined direction of the goaf, the action range is expanded, and the fire prevention and extinguishing effect is improved.
Drawings
Fig. 1 is a flow chart of the fire prevention and extinguishing system of the coal goaf in one embodiment of the present invention.
Detailed Description
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.
The technical solution and effects of the present invention will be further explained by the following embodiments. The following embodiments are merely illustrative of the present invention, and the present invention is not limited to the following embodiments or examples. Use the utility model discloses a think about right the utility model discloses the simple change that goes on is all in the utility model discloses the within range that claims.
The utility model provides a coal collecting space area's fire prevention and extinguishing systems, as shown in figure 1, include:
the liquid fire prevention and extinguishing material injection chamber is positioned in the middle of the return airway 1 of the mining area;
a first drilling hole is formed from the ground surface to the mining area return airway 1;
a liquid fire prevention and extinguishing material vertical pipe is arranged in the first drilling hole and communicated to the liquid fire prevention and extinguishing material chamber;
a liquid injection fire prevention material pipeline, which comprises a first pipeline 5, a second pipeline 6 and a third pipeline 7;
the first pipeline 5 is laid along the return airway 1 of the mining area and is connected with the liquid-injected fire-fighting material vertical pipe through the liquid-injected fire-fighting material chamber;
the second pipeline 6 is laid along the coal face return air connecting roadway 2 and connected to the first pipeline 5;
the third pipeline 7 is laid along the working face return airway 3 and connected to the tail end of the second pipeline 6;
the tail end of the third pipeline 7 is connected with a first branch pipe 71 laid along the working face air return lane 3, and the first branch pipe 71 extends to the gob 11 along the working face air return lane 3; the tail end of the first branch pipe 71 is connected with a first liquid outlet pipe 73, and the first liquid outlet pipe 73 is laid on the bottom plate of the goaf 11 along the inclined direction of the coal face; at least 1 first liquid outlet 731 is arranged on the first liquid outlet pipe 73.
As understood by those skilled in the art, liquid fire protection and extinguishing materials are generally referred to as liquid nitrogen or liquid carbon dioxide.
It is understood by those skilled in the art that a chamber refers to underground roadways with three axes of space having small difference in length and not directly communicated with the ground, such as a winch room, a substation, a coal bunker and the like. In the utility model, it is equivalent to a transfer station.
The utility model discloses a fire prevention and extinguishing systems in coal collecting space area, the flow is simple, convenient operation, and can be with the ejection of compact of fire prevention material in collecting space area incline direction to act on whole collecting space area, fire prevention and extinguishing effect is good.
In one embodiment, first outlet conduit 73 is spaced from withdrawal line 10 by a distance of 25-42.5 m.
Those skilled in the art understand that the path between the stope line 10 and the gob 11 is a withdrawal path.
When the distance between the first liquid outlet pipe 73 and the stoping line 10 is too small, the liquid fire prevention and extinguishing material is easy to diffuse into the coal face and the withdrawal channel after vaporization, so that the oxygen concentration in the coal face and the withdrawal channel is reduced, and the personal safety of workers is threatened; when the distance is too large, the fire point at the shallow part of the goaf is not easy to control, and the fire prevention and extinguishing effect is not obvious. The distance is more suitable to be 25-42.5m, and liquid fire prevention and extinguishing materials are not easy to diffuse to a coal face and a withdrawal channel, and the fire point of the shallow part of the goaf is easy to control.
In one embodiment, at least 2 first liquid outlets 731 are disposed on each of the first liquid outlets 73 at intervals.
In one embodiment, the first outlet ports 731 are 2-10, such as 3, 5, 7 or 9, and are spaced apart from each other on the first outlet pipe 73.
The arrangement further enlarges the discharging range and the action range of the liquid fire prevention and extinguishing material in the goaf, and improves the fire prevention and extinguishing effect.
Two adjacent first effluent pipes 73 may be spaced 17-25m apart.
In one embodiment, the first liquid outlets 731 are 9 and are located at the rear of the 20# rack, 35# rack, 50# rack, 65# rack, 80# rack, 95# rack, 110# rack, 125# rack and 135# rack of the coal face, which refers to the portion located in the goaf 11.
In one embodiment, a second branch pipe 72 is connected to the end of the third pipeline 7 along the working face return airway 3, and the second branch pipe 72 extends along the working face return airway 3 to the goaf 11; the tail end of the second branch pipe 72 is connected with a second liquid outlet pipe 74, and the second liquid outlet pipe 74 is laid on the bottom plate of the goaf 11 along the inclined direction of the coal face; at least 1 second liquid outlet 741 is disposed on the second liquid outlet 74.
The action range of the fire prevention and extinguishing materials in the goaf is further enlarged, and the fire prevention and extinguishing effect is improved.
In one embodiment, second outlet conduit 74 is spaced 25-42.5m from the stopping line, and second outlet conduit 74 is spaced at least 10m from first outlet conduit 73.
By the arrangement, on one hand, the liquid fire prevention and extinguishing material is not easy to diffuse to a coal face and a withdrawal channel after being vaporized, and the ignition point of the shallow part of the goaf is easy to control; on the other hand, the liquid fire prevention and extinguishing materials output by the second liquid outlet pipe 74 and the first liquid outlet pipe 73 are prevented from overlapping to influence the fire prevention and extinguishing effect, the action range of the liquid fire prevention and extinguishing materials in the middle area of the goaf is further expanded, and the fire prevention and extinguishing effect is improved.
In one embodiment, at least 2 second outlet ports 741 are disposed on the second outlet conduit 74.
In one embodiment, 2 to 10 second outlet ports 741 are provided and spaced apart from each other on the second outlet conduit 74.
The arrangement further enlarges the action range of the liquid fire prevention and extinguishing material in the goaf and improves the fire prevention and extinguishing effect.
Two adjacent second liquid outlet ports 741 can be separated by 17-25 m.
In one embodiment, the second exit ports 741 are 6 and located at the rear of the 80# support, the 90# support, the 100# support, the 110# support, the 120# support and the 130# support of the coal face, respectively, and the rear refers to the portion located in the goaf 11.
The upper surfaces of the first and second discharge ports 731 and 741 may be protected by mounting angles. The length of the angle steel is 15-25cm, such as 20 cm.
In practical application, the number of the liquid outlet pipes can be increased or decreased according to practical situations, for example, one or more liquid outlet pipes laid on the bottom plate of the gob 11 along the inclined direction of the coal face can be additionally arranged according to practical situations. Correspondingly, a branch connected to the end of the third pipe 7 can also be added simultaneously.
In one embodiment, the liquid injection fire prevention material pipeline further comprises a fourth pipeline 8, the fourth pipeline 8 is laid along a wind tunnel below a coal face and is connected to the first pipeline 5; the air lane is a working face air inlet lane 16 or an adjacent coal face air return lane 4; the lower extreme of collecting space area is provided with at least 1 second drilling 9, the end of fourth pipeline 8 is connected to at least 1 second drilling 9 respectively.
In one embodiment, the air way is a working face air way 16, and the second bore 9 is arranged at the left side edge of the lower end of the gob.
In one embodiment, the air way is an adjacent coal face return air way 4, and the second drill hole 9 is arranged at the bottom edge of the lower end of the goaf.
By the arrangement, the liquid fire prevention and extinguishing materials can be conveyed to the goaf 11 from the lower end of the goaf 11 and can be discharged from a plurality of positions in the goaf 11, so that the action range of the liquid fire prevention and extinguishing materials in the goaf is further expanded, and the fire prevention and extinguishing effect is improved.
In one embodiment, there are at least 2 second bores 9, which are spaced apart.
In one embodiment, the second bores 9 are 3-5 and spaced apart.
The arrangement mode further enlarges the action range of the liquid fire prevention and extinguishing material and improves the fire prevention and extinguishing effect.
In one embodiment, the fire suppression system further comprises a grout line comprising a grout main line 12 and a grout branch line; the grouting main pipeline 12 is laid along the stope return airway 1 and connected to a ground grouting workshop; the grouting branch pipelines are sequentially laid along the parking lot return air connecting roadway 13 and the working face return air roadway 3, one end of each grouting branch pipeline is connected to the main grouting pipeline 12, the other end of each grouting branch pipeline extends to the goaf 11, and the fire preventing and extinguishing effect on the goaf is further improved.
In one embodiment, the fire prevention system further comprises a gaseous fire prevention and extinguishing material pipeline comprising a main gaseous fire prevention and extinguishing material pipeline 14 and a branch gaseous fire prevention and extinguishing material pipeline; the main gaseous fire prevention and extinguishing material pipeline 14 is laid along the mining area return airway 1 and connected to a ground nitrogen injection workshop; the branch pipeline of the gaseous fire-fighting material is laid along a train yard return air connection roadway 13, the working face return air roadway 3, a working face measure roadway 15 and a working face air inlet roadway 16 in sequence, one end of the branch pipeline of the gaseous fire-fighting material is connected to the main pipeline 14 of the gaseous fire-fighting material, and the other end of the branch pipeline of the gaseous fire-fighting material extends to the goaf 11, so that the fire-fighting effect on the goaf is further improved.
As will be appreciated by those skilled in the art, the gaseous fire suppressant material is typically gaseous nitrogen.
The utility model discloses a coal collecting space area's fire prevention and extinguishing systems is shown as figure 1 when using.
A part of liquid fire prevention and extinguishing materials (such as liquid nitrogen or liquid carbon dioxide) sequentially pass through a liquid fire prevention and extinguishing material injection vertical pipe, a liquid fire prevention and extinguishing material injection chamber, a first pipeline 5, a second pipeline 6, a third pipeline 7, a first branch pipe 71 and a second branch pipe 72 which are connected to the tail end of the third pipeline 7 to respectively convey the liquid fire prevention and extinguishing materials from the upper end of the goaf 11 to a first liquid outlet pipe 73 and a second liquid outlet pipe 74, and respectively convey the liquid fire prevention and extinguishing materials to the goaf from a first liquid outlet 731 on the first liquid outlet pipe 73 and a second liquid outlet 741 on the second liquid outlet pipe 74 in a dispersing manner;
a part of liquid fire prevention and extinguishing materials (such as liquid nitrogen or liquid carbon dioxide) sequentially pass through a liquid fire prevention and extinguishing material injection vertical pipe, a liquid fire prevention and extinguishing material injection chamber, a fourth pipeline 8 and a second drilling hole 9 connected to the tail end of the fourth pipeline 8 to convey the liquid fire prevention and extinguishing materials to the goaf from the lower end of the goaf;
the slurry is conveyed to a goaf from a grouting workshop through a main grouting pipeline 12 and a branch grouting pipeline in sequence;
gaseous fire prevention and extinguishing materials (such as gas nitrogen) are conveyed to the goaf from the nitrogen injection workshop through the main gaseous fire prevention and extinguishing material pipeline 14 and the branch gaseous fire prevention and extinguishing material pipeline.
The fire prevention and extinguishing system of the coal goaf has simple flow and convenient operation, and can act fire prevention and extinguishing materials (including liquid fire prevention and extinguishing materials, gaseous fire prevention and extinguishing materials and slurry) on the bottom plate of the goaf, thereby having good fire prevention and extinguishing effect; the fire prevention and extinguishing material has a large action range in the goaf and good fire prevention and extinguishing effect.
Claims (10)
1. A fire prevention and extinguishing system of coal goaf, characterized by includes:
the liquid fire prevention and extinguishing material injection chamber is positioned in the middle of the return airway (1) of the mining area;
a first drill hole is arranged from the ground surface to the mining area return airway (1);
a liquid fire prevention and extinguishing material vertical pipe is arranged in the first drilling hole and communicated to the liquid fire prevention and extinguishing material chamber;
a liquid injection fire prevention material pipeline, which comprises a first pipeline (5), a second pipeline (6) and a third pipeline (7);
the first pipeline (5) is laid along a return airway (1) of a mining area and is connected with the liquid injection fire-fighting material vertical pipe through the liquid injection fire-fighting material chamber;
the second pipeline (6) is laid along the coal face air return connecting roadway (2) and connected to the first pipeline (5);
the third pipeline (7) is laid along the working face return airway (3) and is connected to the tail end of the second pipeline (6);
the tail end of the third pipeline (7) is connected with a first branch pipe (71) laid along the working face air return roadway (3), and the first branch pipe (71) extends to the goaf (11) along the working face air return roadway (3); the tail end of the first branch pipe (71) is connected with a first liquid outlet pipe (73), and the first liquid outlet pipe (73) is laid on the bottom plate of the goaf (11) along the inclined direction of the coal face; the first liquid outlet pipe (73) is provided with at least 1 first liquid outlet (731).
2. Fire prevention and suppression system according to claim 1, characterized in that the first outlet pipe (73) is at a distance of 25-42.5m from the stoping line (10).
3. Fire prevention system according to claim 2, characterized in that said first outlet ports (731) are 2-10 and are spaced apart on said first outlet pipe (73).
4. Fire prevention system according to any of claims 1-3, characterized in that the third pipeline (7) terminates with a second branch (72) running along the face return (3), which second branch (72) extends along the face return (3) to the goaf (11); the tail end of the second branch pipe (72) is connected with a second liquid outlet pipe (74), and the second liquid outlet pipe (74) is laid on the bottom plate of the goaf (11) along the inclined direction of the coal face; at least 1 second liquid outlet (741) is arranged on the second liquid outlet pipe (74).
5. Fire prevention system according to claim 4, characterized in that the second outlet pipe (74) is at a distance of 25-42.5m from the stoping line and that the second outlet pipe (74) is at least 10m spaced from the first outlet pipe (73).
6. Fire prevention system according to claim 5, characterized in that said second exit openings (741) are 2-10 and spaced apart on said second exit tube (74).
7. Fire prevention system according to any of claims 1-3 and 5-6, characterized in that the liquid fire prevention material injection pipeline further comprises a fourth pipeline (8), the fourth pipeline (8) being laid along a roadway below a coal face and being connected to the first pipeline (5); the air lane is a working face air inlet lane (16) or an adjacent coal face air return lane (4); the lower extreme of collecting space area is provided with at least 1 second drilling (9), the end of fourth pipeline (8) be connected to respectively at least 1 second drilling (9).
8. Fire prevention system according to claim 7, characterized in that the second bore hole (9) has 3-5.
9. The fire prevention system of claim 7 further comprising a grout line comprising a main grout line (12) and a branch grout line; the grouting main pipeline (12) is laid along the stope return airway (1) and connected to a ground grouting workshop; the grouting branch pipelines are sequentially laid along a parking lot return air connecting roadway (13) and the working face return air roadway (3), one end of each grouting branch pipeline is connected to the grouting main pipeline (12), and the other end of each grouting branch pipeline extends to the goaf (11).
10. Fire prevention system according to claim 8 or 9, further comprising a gaseous fire prevention material pipeline comprising a main gaseous fire prevention material pipeline (14) and a branch gaseous fire prevention material pipeline; the main gaseous fire prevention and extinguishing material pipeline (14) is laid along the mining area return airway (1) and connected to a ground nitrogen injection workshop; the gas fire prevention and extinguishing material branch pipelines are laid along a parking lot return air connection roadway (13), the working face return air roadway (3), a working face measure roadway (15) and a working face air inlet roadway (16) in sequence, one end of each gas fire prevention and extinguishing material branch pipeline is connected to the main gas fire prevention and extinguishing material pipeline (14), and the other end of each gas fire prevention and extinguishing material branch pipeline extends to the goaf (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920893889.9U CN210239733U (en) | 2019-06-13 | 2019-06-13 | Fire prevention and extinguishing system of coal goaf |
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|---|---|---|---|
| CN201920893889.9U CN210239733U (en) | 2019-06-13 | 2019-06-13 | Fire prevention and extinguishing system of coal goaf |
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