CN211008732U - Device for preventing spontaneous combustion of goaf in coal mine - Google Patents
Device for preventing spontaneous combustion of goaf in coal mine Download PDFInfo
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- CN211008732U CN211008732U CN201921919824.3U CN201921919824U CN211008732U CN 211008732 U CN211008732 U CN 211008732U CN 201921919824 U CN201921919824 U CN 201921919824U CN 211008732 U CN211008732 U CN 211008732U
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Abstract
The utility model discloses a device that is used for colliery to prevent spontaneous combustion in collecting space area, it includes gas analysis device, gas drainage device, hinder the reagent device, water injection device and notes nitrogen device, gas analysis device includes beam pipe and CO probe, beam pipe one end is arranged inside collecting surface collecting space area, the other end is finally connected to the gaseous analysis room in ground through collecting surface return air lane and other tunnel, the CO probe is arranged on the position in collecting surface upper corner presses close to collecting space area, hinder the reagent device including hinder the reagent person in charge and hinder the reagent case, hinder the reagent case and arrange on collecting surface crossheading upper portion, hinder the reagent person in charge and arranged a plurality of nozzles, it is connected to hinders reagent bottom of the case to hinder reagent one end, it is located the collecting surface machine way to hinder the reagent person in charge. By establishing three systems of monitoring, fire prevention and fire extinguishing in the goaf and comprehensively arranging the three systems, the coal in the goaf is oxidized and spontaneously combusted to be eliminated in a bud state, so that casualties and property loss are reduced, the phenomenon of fire disaster in a coal mine is eliminated, and a good using effect is achieved.
Description
Technical Field
The utility model relates to a coal mine safety device especially relates to a device that is used for the colliery to prevent spontaneous combustion in collecting space area, belongs to coal mine safety equipment technical field.
Background
Mineral resources in China are rich, coal accounts for about 60% of primary energy consumption in China, accidents caused by spontaneous combustion of a coal mine goaf cause casualties and property loss, due to the limitation of mining technology, coal remains and coal loss in the goaf are common, air flow of a working face leaks to the goaf, oxygen in air and the coal are subjected to slow oxidation reaction to release heat, and when the heat is accumulated to a certain degree, coal begins to burn. Because coal seams have different spontaneous combustion grades, the spontaneous combustion ignition period of coal cannot be accurately mastered, so that the fire is not easy to be perceived, and the fire of a goaf in the stope stoping process is caused.
The existing coal mine goaf fire prevention and extinguishing technology mainly comprises the injection of preventive grouting materials or the use of stopping agents. The injected preventive grouting material is a passive fire prevention and extinguishing mode, the requirement on fire detection means of the goaf is high, the area of the goaf is large, the internal condition is complex, and the problems that grouting cannot reach the ignition position or a grouting pipe is blocked and the like easily occur, so that the failure of fire prevention and extinguishing is caused; the inhibitor is used for preventing and extinguishing fire, although the effect of inhibiting spontaneous combustion and ignition of residual coal in the goaf in advance can be achieved, the cost of mine fire prevention and extinguishing can be greatly increased by filling a large amount of the inhibitor into the goaf. The fire prevention and extinguishing technology is mostly a single method aiming at the existing goaf, the practical application effect is relatively poor, so the utility model provides a comprehensive system for preventing spontaneous combustion of the coal mine goaf, and the spontaneous combustion of the coal bed is extinguished in the bud state.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the utility model provides a device that is used for colliery to prevent spontaneous combustion in collecting space area, it is a safe, high-efficient, the reliability is high, the timely coal mine collecting space area fire prevention and extinguishing systems of response, has solved prior art to the not enough of colliery collecting space area fire extinguishing capability in the pit, and it can in time discover the condition of a fire, and the high efficiency is put out a fire, guarantees the life safety of colliery borehole operation personnel and reduces economic loss, the effectual problem of having solved above-mentioned existence.
The technical scheme of the utility model is that: the utility model provides a device for colliery prevents spontaneous combustion in collecting space area, it includes gas analysis device, gas drainage device, hinders reagent device, water injection device and notes nitrogen device, gas analysis device includes beam pipe and CO probe, beam pipe one end is arranged inside collecting surface collecting space area, the other end finally is connected to ground gas analysis room through collecting surface return airway and other tunnel, the CO probe is arranged on the position that collecting space area is pressed close to the upper corner of collecting surface, hinder the reagent device and include hindering the reagent person in charge and hinder the reagent case, hinder the reagent case and arrange on collecting surface crossheading upper portion, hinder and arrange a plurality of nozzles on being responsible for, hinder the reagent person in charge one end and be connected to hindering reagent case bottom, the other end stretches to the transportation, hinder the reagent person in charge and be located the collecting surface machine way.
The gas extraction device comprises a gas extraction pipe, the gas extraction pipe is arranged in a stope return airway and extends to a goaf, a blocking plate is arranged on the gas extraction pipe and is connected with a bypass pipe through a tee joint, the bypass pipe is located in the direction of the goaf, the blocking plate is located on the stope, and a plurality of pipe burying and breaking devices are further arranged on the gas extraction pipe of the goaf.
The water injection device comprises a top plate water injection hole and high-pressure water pipes, and a plurality of high-pressure water pipes are arranged in the goaf and extend into the top plate water injection hole in the top plate fracture zone and the goaf oxidation zone.
The nitrogen injection device comprises a nitrogen injection pipe and a nitrogen injection pipe tee joint, wherein the nitrogen injection pipe is arranged in the goaf and communicated with the ground through a pipeline, and the nitrogen injection pipe tee joint is arranged on the nitrogen injection pipe.
The utility model has the advantages that: compared with the prior art, adopt the technical scheme of the utility model, the utility model discloses a monitoring method, prevention method, the method of putting out a fire from coal mine goaf summarize and refine and draw, wherein monitoring method has used the beam tube to gather goaf gas and has carried out analysis and CO probe and make up monitoring method, through the analysis sign of spontaneous combustion ignition in the judgement goaf. The prevention method adopts pipe burying (pipe breaking) to extract gas, prevents gas aggregation in an extraction oxidation zone, reduces air flow, and reduces the contact probability of coal and oxygen; the method for reducing and taking away heat generated by oxidation of residual coal in the goaf by injecting water into the crack zone of the top plate prevents the residual coal in the goaf from falling into coal and accelerating the oxidation; spraying a stopping agent, forming a compact water film on the residual coal falling coal through the stopping agent, and isolating oxygen from entering a coal body so as to prevent the residual coal falling coal in the goaf from being oxidized at an accelerated speed; the fire extinguishing method realizes efficient fire extinguishing in the goaf by nitrogen injection, and eliminates the coal in the goaf in an oxidation and spontaneous combustion manner in a bud state by establishing three systems of goaf monitoring, goaf fire prevention and goaf fire extinguishing and performing comprehensive arrangement, thereby reducing casualties and property loss caused by spontaneous combustion in the goaf, basically eliminating the phenomenon of fire hazard in a coal mine and achieving good use effect.
Drawings
FIG. 1 is a schematic view of the overall arrangement of the present invention;
FIG. 2 is a schematic layout view of the gas extraction device of the present invention;
FIG. 3 is a schematic view of the arrangement of the inhibitor device of the present invention;
FIG. 4 is a schematic view of the arrangement of the water injection device of the present invention;
fig. 5 is a schematic layout of the nitrogen injection device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example 1: as shown in the attached drawings 1-5, the device for preventing spontaneous combustion of the goaf of the coal mine comprises a gas analysis device, a gas extraction device, a stopping agent device 4, a water injection device and a nitrogen injection device, wherein the gas analysis device comprises a beam pipe 1 and a CO probe 2, one end of the beam pipe 1 is arranged inside the goaf of the mining face, the other end of the beam pipe is finally connected to a ground gas analysis chamber through a mining face return airway and other tunnels, the CO probe 2 is arranged on the position, close to the goaf, of a corner on the mining face, the stopping agent device 4 comprises a stopping agent main pipe 11 and a stopping agent box 10, the stopping agent box 10 is arranged on the upper portion of a mining face gateway, a plurality of nozzles 12 are arranged on the stopping agent main pipe 11, one end of the stopping agent main pipe 11 is connected to the bottom of the stopping agent box 10, the other end of the stopping agent main pipe extends to. The stopping agent has natural water absorption, and can form a layer of compact water film on the coal falling surface of the residual coal in the goaf when sprayed into the goaf, so that the contact of oxygen in the air and the coal is blocked, and the spontaneous combustion of the coal is prevented. The stopping agent is conveyed into the stopping agent main pipe 11 under the action of mine compressed air, reaches the stopping agent nozzles 12 uniformly arranged on the whole mining surface and sprays to the bottom plate of the goaf, and the stopping agent can be uniformly spread to the goaf along with the mining of the mining surface, so that the effect of preventing the goaf from naturally firing is achieved.
The stopping agent spraying device 4 is arranged on the face mining machine channel, the stopping agent is used and has a water absorption characteristic, the stopping agent is regularly sprayed on the bottom plate of the goaf, a layer of water film is arranged on the surface of the bottom plate, when coal is oxidized to generate heat, the water film is favorable for heat dissipation, oxygen is prevented from entering a pore structure of the coal, the spontaneous combustion speed of float coal in the goaf is relieved, and the spontaneous combustion phenomenon of the coal is prevented.
Further, the gas extraction device comprises a gas extraction pipe 3, the gas extraction pipe 3 is arranged in a stope face return airway and extends to a goaf, a blocking plate 8 is arranged on the gas extraction pipe 3 and is connected with a bypass pipe 9 through a tee joint, the bypass pipe 9 is located in the direction of the goaf, the blocking plate 8 is located on a stope face, and a plurality of pipe burying and breaking devices 7 are further arranged on the gas extraction pipe 3 of the goaf. When the gas in the cooling zone of the goaf is extracted by the buried pipe in the goaf, the gas extraction pipeline in the oxidation zone of the goaf is disconnected at a fixed point, so that the gas accumulation and the overrun of the upper corner of the goaf can be effectively prevented, the gas extraction action points in the cooling zone and the oxidation zone of the goaf are changed, and the air flow in the oxidation zone is reduced. The bypass pipe 9 is used for extracting gas in the goaf, an extraction negative pressure action point is transferred from the cooling zone to the oxidation zone along with the advancing of the mining face, and the bypass pipe in the oxidation zone and the suffocation zone is not extracted any more under the control of the blocking plate 8, so that the air flow in the oxidation zone is reduced.
The pipe burying and breaking device 7 can transfer the extraction negative pressure action point in the oxidation zone into the cooling zone by artificially breaking the pipe of the buried pipe in the oxidation zone, so that the air flow of the oxidation zone in the goaf is reduced, the probability of contact between the residual coal and the air is reduced, and the spontaneous combustion of the floating coal in the goaf due to oxidation is prevented. The pipe laying and pipe breaking device 7 is a patent application technology previously filed by the applicant, and is not stated in detail in relation to the prior art already filed by the applicant.
Further, the water injection device comprises a top plate water injection hole 5 and a high-pressure water pipe 13, and a plurality of high-pressure water pipes 13 are arranged in the goaf and extend into the top plate water injection hole 5 in the top plate fracture zone and the goaf oxidation zone. By injecting water into the goaf roof fracture zone for cooling, pre-water injection drilling is carried out on the upper corner of the mining face to the goaf fracture zone, and water is injected into the fracture zone for cooling, so that temperature accumulation after spontaneous combustion of the coal bed in the goaf can be effectively controlled, and a fireproof effect is achieved. Along with the advance of the mining face, the caving zone rocks and the left coal in the goaf can collapse to the bottom plate, and the fracture zone can generate fractures due to the action of the ground pressure. The high-pressure water pipe 13 can be used for pressing water to the top plate water injection holes 5 in the top plate crack zone and the goaf oxidation zone through pressure, water flows into the oxidation zone along the top plate crack, and heat generated by oxidation of residual coal in the oxidation zone is taken away through evaporation, so that spontaneous combustion of the goaf is effectively prevented.
Further, annotate the nitrogen device and include annotating nitrogen pipe 6 and annotate nitrogen pipe tee bend 14, annotate nitrogen pipe 6 and arrange in the collecting space area and pass through the pipeline intercommunication with ground, be equipped with on annotating nitrogen pipe 6 and annotate nitrogen pipe tee bend 14. By injecting nitrogen into the goaf, a nitrogen injection pipeline with a nitrogen injection hole is laid in advance in the mining face transportation roadway, and when the spontaneous combustion and ignition symptoms appear in the goaf, nitrogen (inert gas) with the concentration of more than 97 percent is injected to replace the concentration of oxygen (combustion-supporting gas) in the goaf, so that the effect of suffocation and fire extinguishing is achieved.
A use method of a device for preventing spontaneous combustion of a goaf in a coal mine comprises the following steps:
firstly, gas in the goaf can be extracted for manual analysis through the tube bundle 1 arranged in the goaf;
secondly, detecting CO components on a mining face through a CO probe 2, and transmitting data to a mine monitoring terminal in real time;
thirdly, gas extraction pipelines in an oxidation zone of the goaf can be disconnected at fixed points through the pipe burying and breaking device 7 while gas in a cooling zone of the goaf can be extracted through the gas extraction device, so that the flow of air in the oxidation zone is reduced;
fourthly, the stopping agent device 4 can regularly spray the stopping agent on the bottom plate of the goaf in the stoping process of the mining face, thereby relieving the spontaneous combustion speed of float coal in the goaf and preventing the spontaneous combustion of coal;
constructing a pre-injection hole on the upper corner of the mining face through a water injection device until the pre-injection hole reaches the fractured zone of the goaf, pre-injecting water into the fractured zone to cool the coal bed, and effectively controlling the temperature accumulation of the coal bed in the goaf after spontaneous combustion so as to achieve the fireproof effect;
sixthly, when spontaneous combustion of the goaf is found through the beam tube 1 or the CO probe 2, nitrogen is conveyed to the nitrogen injection tube 6 of the conveying roadway from the ground through a pipeline, and then nitrogen is injected into the goaf through the nitrogen injection tube tee joint 14.
The gas analysis device comprises a beam tube monitoring technology and a CO probe. The former is composed of a sampling system, a gas sampling controller, a microcomputer system and the like, gas in the goaf is pumped out periodically or irregularly, and spontaneous combustion sensitive indexes of the goaf are observed by manually analyzing gas components; and the CO probe is responsible for monitoring the concentration of CO outside the goaf. The two components form a redundancy system, so that the judgment on the spontaneous combustion condition in the goaf is more accurate and reliable.
And after the mining face is finished to produce, the goaf is sealed in time, and a nitrogen injection pipe, a water injection pipe and an observation hole are reserved on the sealing. The observation hole is a hole reserved for the beam tube monitoring system, and the beam tube can enter the goaf through the observation hole to collect an air sample body in the goaf and analyze the air sample body.
The utility model discloses follow monitoring method, prevention method, the method of putting out a fire that the coal mine gob was fired and summarize and refine and draw, wherein monitoring method has used the beam tube to gather the gob gas and has carried out analysis and CO probe and make up monitoring method, through the spontaneous combustion sign of firing in the analysis judgement gob. The prevention method adopts pipe burying (pipe breaking) to extract gas, prevents gas aggregation in an extraction oxidation zone, reduces air flow, and reduces the contact probability of coal and oxygen; the method for reducing and taking away heat generated by oxidation of residual coal in the goaf by injecting water into the crack zone of the top plate prevents the residual coal in the goaf from falling into coal and accelerating the oxidation; spraying a stopping agent, forming a compact water film on the residual coal falling coal through the stopping agent, and isolating oxygen from entering a coal body so as to prevent the residual coal falling coal in the goaf from being oxidized at an accelerated speed; the fire extinguishing method realizes efficient fire extinguishing in the goaf by nitrogen injection, and eliminates the coal in the goaf in an oxidation and spontaneous combustion manner in a bud state by establishing three systems of goaf monitoring, goaf fire prevention and goaf fire extinguishing and performing comprehensive arrangement, thereby reducing casualties and property loss caused by spontaneous combustion in the goaf, basically eliminating the phenomenon of fire hazard in a coal mine and achieving good use effect.
The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (4)
1. The utility model provides a device that is used for colliery to prevent spontaneous combustion in collecting space area which characterized in that: the gas analysis device comprises a beam tube (1) and a CO probe (2), one end of the beam tube (1) is arranged inside a goaf of a mining face, the other end of the beam tube is finally connected to a ground gas analysis chamber through a mining face air return roadway and other roadways, the CO probe (2) is arranged on the position, close to the goaf, of the upper corner of the mining face, the stopping agent device (4) comprises a stopping agent main tube (11) and a stopping agent box (10), the stopping agent box (10) is arranged on the upper portion of a gateway of the mining face, a plurality of nozzles (12) are arranged on the stopping agent main tube (11), one end of the stopping agent main tube (11) is connected to the bottom of the stopping agent box (10), the other end of the stopping agent main tube extends to the lower portion of the gateway of the mining face, and the stopping agent main tube (11) is located on a mining face machine path.
2. An apparatus for preventing spontaneous combustion in a gob in a coal mine as set forth in claim 1, wherein: the gas extraction device comprises a gas extraction pipe (3), the gas extraction pipe (3) is arranged in a stope face return airway and extends to a goaf, a blocking plate (8) is arranged on the gas extraction pipe (3) and is connected with a bypass pipe (9) through a tee joint, the bypass pipe (9) is located in the direction of the goaf, the blocking plate (8) is located on a stope face, and a plurality of pipe burying and breaking devices (7) are further arranged on the gas extraction pipe (3) of the goaf.
3. An apparatus for preventing spontaneous combustion in a gob in a coal mine as set forth in claim 1, wherein: the water injection device comprises a roof water injection hole (5) and a high-pressure water pipe (13), wherein a plurality of high-pressure water pipes (13) are arranged in the goaf and extend into the roof water injection hole (5) in the roof fracture zone and the goaf oxidation zone.
4. An apparatus for preventing spontaneous combustion in a gob in a coal mine as set forth in claim 1, wherein: the nitrogen injection device comprises a nitrogen injection pipe (6) and a nitrogen injection pipe tee joint (14), wherein the nitrogen injection pipe (6) is arranged in the goaf and is communicated with the ground through a pipeline, and the nitrogen injection pipe tee joint (14) is arranged on the nitrogen injection pipe (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921919824.3U CN211008732U (en) | 2019-11-08 | 2019-11-08 | Device for preventing spontaneous combustion of goaf in coal mine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921919824.3U CN211008732U (en) | 2019-11-08 | 2019-11-08 | Device for preventing spontaneous combustion of goaf in coal mine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546487A (en) * | 2020-12-03 | 2021-03-26 | 石家庄国盛矿业科技有限公司 | Treatment process for fire zone of coal seam around coal mine collapse column |
| CN113202542A (en) * | 2021-06-18 | 2021-08-03 | 辽宁工程技术大学 | Coal mine goaf fire monitoring beam tube arrangement structure and method |
| CN114251115A (en) * | 2021-12-06 | 2022-03-29 | 抚顺矿业集团有限责任公司 | Replacement grouting fire extinguishing method suitable for deep fire disaster under open-pit mine railway |
-
2019
- 2019-11-08 CN CN201921919824.3U patent/CN211008732U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546487A (en) * | 2020-12-03 | 2021-03-26 | 石家庄国盛矿业科技有限公司 | Treatment process for fire zone of coal seam around coal mine collapse column |
| CN112546487B (en) * | 2020-12-03 | 2022-03-11 | 石家庄国盛矿业科技有限公司 | Treatment process for fire zone of coal seam around coal mine collapse column |
| CN113202542A (en) * | 2021-06-18 | 2021-08-03 | 辽宁工程技术大学 | Coal mine goaf fire monitoring beam tube arrangement structure and method |
| CN113202542B (en) * | 2021-06-18 | 2024-04-16 | 辽宁工程技术大学 | Coal mine goaf fire monitoring beam tube arrangement structure and method |
| CN114251115A (en) * | 2021-12-06 | 2022-03-29 | 抚顺矿业集团有限责任公司 | Replacement grouting fire extinguishing method suitable for deep fire disaster under open-pit mine railway |
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