阅读说明：本技术 一种煤矿防火系统和煤矿灭火方法 (Coal mine fire prevention system and coal mine fire extinguishing method ) 是由 蒋学明 温双武 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种煤矿防火系统和煤矿灭火方法,煤矿防火系统包括工作巷道、防火巷道和采空区,防火巷道内间隔设置有多块仓室隔板；任意相邻的两块仓室隔板之间形成了隔离仓室,每个隔离仓室与工作巷道之间通过一块仓室挡板隔离；防火巷道内设有气体检测装置,气体检测装置的装置检测端位于其中一个隔离仓室内,气体检测装置的装置观察端位于工作巷道内。煤矿灭火方法为通过气体检测装置对每一个隔离仓室进行检测观察；判断出需要进行灭火处理的隔离仓室；向需要灭火的隔离仓室内注入灭火材料。防火巷道分隔为多个隔离仓室,从而能够快速定位起火位置。(The invention discloses a coal mine fire protection system and a coal mine fire extinguishing method, wherein the coal mine fire protection system comprises a working roadway, a fire protection roadway and a goaf, and a plurality of cabin partition plates are arranged in the fire protection roadway at intervals; an isolation chamber is formed between any two adjacent chamber partition plates, and each isolation chamber is isolated from the working roadway by a chamber baffle; a gas detection device is arranged in the fireproof roadway, the device detection end of the gas detection device is positioned in one of the isolation cabins, and the device observation end of the gas detection device is positioned in the working roadway. The coal mine fire extinguishing method is characterized in that each isolation bin is detected and observed through a gas detection device; judging an isolation chamber needing fire extinguishing treatment; and injecting fire extinguishing material into the isolation chamber needing fire extinguishing. The fire prevention tunnel is separated for a plurality of isolation bins to can fix a position the position of catching a fire fast.)

1. A coal mine fireproof system (10) is characterized by comprising a working roadway (1), a fireproof roadway (2) and a goaf (3), wherein the fireproof roadway (2) is positioned between the working roadway (1) and the goaf (3);

a plurality of cabin partition plates (41) are arranged in the fireproof roadway (2) at intervals, and the arrangement direction of the cabin partition plates (41) is the same as the extension direction of the fireproof roadway (2);

an isolation bin (4) is formed between any two adjacent bin partition plates (41), and each isolation bin (4) is isolated from the working roadway (1) through a bin baffle (42);

be equipped with gaseous detection device (5) in fire prevention tunnel (2), device check end (51) of gaseous detection device (5) are located one of them in isolation bin (4), device observation end (52) of gaseous detection device (5) are located in work tunnel (1).

2. A coal mine fire protection system (10) according to claim 1, wherein a temperature monitoring device (6) is provided in the fire protection roadway (2), a device sensing end (61) of the temperature monitoring device (6) is located in one of the insulation chambers (4), and a device monitoring end (62) of the temperature monitoring device (6) is located in the working roadway (1).

3. Coal mine fire protection system (10) according to claim 1, characterized in that a sealing coating (43) is provided between the chamber shield (42) and the working tunnel (1).

4. A coal mine fire protection system (10) according to claim 1, wherein a hydraulic support (7) is provided within each said insulation chamber (4);

the hydraulic support (7) comprises a bearing top plate (71), a shield plate (72), a connecting rod (73), a bearing bottom plate (74) and a hydraulic upright post (75), one end of the shield plate (72) is connected with the bearing top plate (71), the connecting rod (73) is pivoted between the other end of the shield plate (72) and the bearing bottom plate (74), and the hydraulic upright post (75) is supported between the bearing top plate (71) and the bearing bottom plate (74);

the bin baffles (42) are disposed between the load bearing top plate (71) and the load bearing bottom plate (74).

5. Coal mine fire protection system (10) according to claim 4, wherein a support bar (76) is connected between the hydraulic column (75) and the chamber shield (42).

6. A coal mine fire protection system (10) according to claim 4, wherein a first fire barrier (8) is provided between the shield plate (72) and the gob (3).

7. A coal mine fire protection system (10) according to claim 4, wherein a second fire barrier (9) is provided between the load bearing roof (71) and the roof of the fire protection roadway (2).

8. A coal mine fire extinguishing method, characterized by comprising a fire extinguishing step of extinguishing a fire by using the coal mine fire protection system (10) according to any one of claims 1 to 7, the fire extinguishing step comprising,

s01: each isolation bin (4) is detected and observed through a gas detection device (5);

s02: judging an isolation chamber (4) which needs to be subjected to fire extinguishing treatment;

s03: injecting fire extinguishing materials into the isolation chamber (4) needing fire extinguishing.

9. A coal mine fire extinguishing method according to claim 8, characterized in that the step S01 includes,

s011: a first fireproof interlayer (8) is arranged between each isolation bin (4) and the goaf (3);

s012: and injecting nitrogen into the goaf (3).

10. The fire extinguishing method for coal mines according to claim 9, comprising in step S011,

s0111: and a second fireproof interlayer (9) is arranged between the hydraulic support (7) in each isolation chamber (4) and the top wall of the fireproof roadway (2).

11. A coal mine fire extinguishing method according to claim 8, characterized in that the step S02 includes,

s021: an isolation bin (4) which is possible to generate coal spontaneous combustion is judged through detection;

s022: injecting nitrogen into an isolation bin (4) which is likely to generate coal spontaneous combustion by using a nitrogen injection device;

s022: and (3) detecting and observing the isolated bin (4) which is possibly subjected to coal spontaneous combustion again through the gas detection device (5), comparing data of the two detection and observation, and determining the isolated bin (4) which needs to be subjected to fire extinguishing treatment.

12. A coal mine fire extinguishing method according to claim 8, characterized in that in the step S03,

s031: a baffle through hole is formed in a chamber baffle (42) of the isolation chamber (4) needing to extinguish the fire, and an injection end of the fire extinguishing device extends into the isolation chamber (4) needing to extinguish the fire through the baffle through hole.

13. A coal mine fire extinguishing method according to claim 12, wherein in step S031,

s0311: the partition plate through holes are formed in two partition plates (41) of the isolation chamber (4) needing to be extinguished, and the injection end of the fire extinguishing device extends into the isolation chamber (4) needing to be extinguished through the partition plate through holes.

Technical Field

The invention relates to the technical field of coal mine production, in particular to a coal mine fire prevention system and a coal mine fire extinguishing method.

Background

In the coal mining process, coal spontaneous combustion accidents are caused due to the property that residual coal in a goaf of a coal face can spontaneously combust under the conditions of high temperature, continuous oxygen supply and the like. When the working face is close to a stoping line, according to the requirements of roof management and equipment withdrawal, a polyester fiber net, a withdrawal channel of construction coal mining equipment and recovery equipment need to be hung, so that the oxygen contact amount and the oxygen contact time of residual coal in a goaf are increased, and spontaneous combustion is easy to occur.

At present, fire prevention and extinguishment are mainly carried out, and after spontaneous combustion and ignition of residual coal in a goaf of a coal face, the working face is usually temporarily closed at passage ports of two roadways, and nitrogen injection, yellow mud grouting, glue filling and the like are carried out. But the injection has the problems that the injection can not accurately reach the spontaneous combustion ignition position, the fire extinguishing efficiency is low, and the like.

In view of the above, improvements are needed.

Disclosure of Invention

The invention aims to provide a coal mine fire prevention system and a coal mine fire prevention method which can quickly position and improve fire prevention efficiency.

The coal mine fire prevention system provided by the technical scheme of the invention comprises a working roadway, a fire prevention roadway and a goaf, wherein the fire prevention roadway is positioned between the working roadway and the goaf; a plurality of cabin partition plates are arranged in the fireproof roadway at intervals, and the arrangement direction of the cabin partition plates is the same as the extension direction of the fireproof roadway; an isolation chamber is formed between any two adjacent chamber partition plates, and each isolation chamber is isolated from the working roadway through a chamber baffle; and a gas detection device is arranged in the fireproof roadway, the device detection end of the gas detection device is positioned in one of the isolation cabins, and the device observation end of the gas detection device is positioned in the working roadway.

Furthermore, a temperature monitoring device is arranged in the fireproof roadway, a device sensing end of the temperature monitoring device is located in one of the isolation cabins, and a device monitoring end of the temperature monitoring device is located in the working roadway.

Further, a sealing coating is arranged between the bin baffle and the working roadway.

Furthermore, a hydraulic support is arranged in each isolation chamber; the hydraulic support comprises a bearing top plate, a shield plate, a connecting rod, a bearing bottom plate and a hydraulic upright post, wherein one end of the shield plate is connected with the bearing top plate, the connecting rod is pivoted between the other end of the shield plate and the bearing bottom plate, and the hydraulic upright post is supported between the bearing top plate and the bearing bottom plate; the bin baffle is arranged between the bearing top plate and the bearing bottom plate.

Furthermore, a support rod is connected between the hydraulic upright post and the chamber baffle.

Furthermore, a first fireproof interlayer is arranged between the shield plate and the gob.

Furthermore, a second fireproof interlayer is arranged between the bearing top plate and the top wall of the fireproof roadway.

The coal mine fire extinguishing method provided by the technical scheme of the invention comprises a fire extinguishing step of extinguishing a fire by using the coal mine fire prevention system, wherein the fire extinguishing step comprises the following steps,

s01: detecting and observing each isolation chamber through a gas detection device;

s02: judging an isolation chamber needing fire extinguishing treatment;

s03: and injecting fire extinguishing material into the isolation chamber needing fire extinguishing.

Further, the step S01 includes that, S011: a first fireproof interlayer is arranged between each isolation bin and the goaf;

s012: and injecting nitrogen into the goaf.

Further, the step S011 includes, S0111: and a second fireproof interlayer is arranged between the hydraulic support in each isolation chamber and the top wall of the fireproof roadway.

Further, the step S02 includes step S021: judging an isolation bin with possibility of spontaneous combustion of coal by detection;

s022: injecting nitrogen into an isolation chamber which is likely to generate coal spontaneous combustion by using a nitrogen injection device;

s022: and detecting and observing the isolation chamber possibly generating coal spontaneous combustion again through the gas detection device, comparing data of the two detection and observation, and determining the isolation chamber needing fire extinguishing treatment.

Further, the step S03 includes that S031: a baffle through hole is formed in a chamber baffle of the isolation chamber needing to be put out a fire, and an injection end of the fire extinguishing device extends into the isolation chamber needing to be put out the fire through the baffle through hole.

Further, in step S031, S0311: the partition plate through holes are formed in the two partition plates of the isolation chamber needing to be put out a fire, and the injection end of the fire extinguishing device extends into the isolation chamber needing to be put out a fire through the partition plate through holes.

According to the coal mine fire prevention system and the coal mine fire extinguishing method, a fire tunnel is divided into a plurality of isolation chambers, the position of a fire source can be quickly positioned through detection and analysis of each isolation chamber, and then fire extinguishing treatment is carried out. So set up, improved fire extinguishing efficiency.

Drawings

FIG. 1 is a schematic view of a coal mine fire protection system in accordance with an embodiment of the present invention;

FIG. 2 is a schematic illustration of an isolation bin, working roadway and gob in one embodiment of the present invention;

FIG. 3 is a schematic illustration of a fire protection roadway and isolation bins in an embodiment of the present invention;

FIG. 4 is a schematic view of a hydraulic mount and a chamber dam in an embodiment of the present invention;

FIG. 5 is a schematic view of a gas detection device, a temperature monitoring device, and a chamber baffle according to an embodiment of the invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

As shown in fig. 1 to 5, a coal mine fire protection system 10 provided for an embodiment of the present invention includes a working roadway 1, a fire protection roadway 2, and a gob 3, where the fire protection roadway 2 is located between the working roadway 1 and the gob 3.

A plurality of cabin partition plates 41 are arranged in the fireproof tunnel 2 at intervals, and the arrangement direction of the cabin partition plates 41 is the same as the extension direction of the fireproof tunnel 2.

An isolation chamber 4 is formed between any two adjacent chamber partition plates 41, and each isolation chamber 4 is isolated from the working roadway 1 through a chamber baffle plate 42.

Be equipped with gaseous detection device 5 in the fire prevention tunnel 2, gaseous detection device 5's device test end 51 is located one of them isolation bin 4, and gaseous detection device 5's device observation end 52 is located work tunnel 1.

The coal mine fire protection system 10 is mainly used in coal mine production. In the coal mining process, the coal mine can be left over in the mining area, and the left coal mine can spontaneously combust under the conditions of high temperature and oxygen supply, so that the fire prevention and fire extinguishing management needs to be carried out on the coal mine, and the personal safety of workers is ensured.

The coal mine fire protection system 10 comprises a working roadway 1, a fire protection roadway 2 and a goaf 3. The working roadway 1 is also a withdrawal roadway and is mainly used for mining and excavating coal mine operation and withdrawal equipment operation. The gob 3 is an area formed after coal mining and excavation, and is filled with gangue and the like. The goaf 3 is located on one side of the working roadway 1, and the fireproof roadway 2 is located between the working roadway 1 and the goaf 3.

The extension direction of the fireproof roadway 2 is the same as that of the working roadway 1. The fireproof tunnel 2 is internally provided with a plurality of cabin partition plates 41 at intervals, the arrangement direction of the cabin partition plates 41 is the same as the extension direction of the fireproof tunnel 2, and the distance between any two adjacent cabin partition plates 41 is equal. A chamber baffle 42 is connected between any two adjacent chamber partition plates 41. The chamber baffle 42 is located between the ends of the two chamber partitions 41 close to the working roadway 1, that is to say the chamber partitions 41 are located between the fire-proof roadway 2 and the working roadway 1, and isolate the fire-proof roadway 2 from the working roadway 1.

Any two adjacent bin partition plates 41 and the bin baffle 42 between two adjacent bin partition plates 41 enclose an isolation bin 4. Therefore, the fire protection roadway 2 is divided into a plurality of isolation chambers 4 by the chamber partitions 41 and the chamber baffles 42.

Be provided with gaseous detection device 5 in the fire prevention tunnel 2, optionally, gaseous detection device 5 is gaseous detector. The gas detection device 5 can detect a gas contained in the isolation chamber 4, such as oxygen, carbon monoxide, acetylene, ethylene, and the like. The gas detection device 5 has a device detection end 51 and a device observation end 52, the device detection end 51 is used for detecting gas, and the device observation end 52 is used for observing content data of the detected gas. Wherein the device inspection end 51 is located in the isolation chamber 4 and the device observation end 52 is located in the working roadway 1.

Alternatively, the chamber shutter 42 is provided with a shutter through hole 421, and the device detection end 51 penetrates into the isolation chamber 4 from the shutter through hole 421. Therefore, the staff can use one gas detection device 5 to detect the gas in each isolation chamber 4, and the cost is reduced.

Optionally, a plurality of gas detection devices 5 are arranged in the fire protection roadway 2, one gas detection device 5 is arranged in each isolation chamber 4, a device detection end 51 of each gas detection device 5 is located in the isolation chamber 4, and a device observation end 52 is located outside the isolation chamber 4. According to the arrangement, each isolation chamber 4 corresponds to one gas detection device 5, so that the isolation chambers 4 are recorded in real time, and the observation and recording of workers are facilitated.

The method for preventing the fire source by the staff through the coal mine fire protection system 10 comprises the following steps. Gas detection device 5 is used to detect the gas in each isolation bin 4 which can cause spontaneous combustion of coal, and the data is recorded. The gas that causes coal to self-ignite is oxygen, acetylene or ethylene. And determining the isolation bin 4 with possibility of coal spontaneous combustion according to the data. Then nitrogen is injected into the isolation chamber 4 where spontaneous combustion of coal is likely to occur, and the nitrogen is used for diluting and inerting the gas in the isolation chamber 4, so that fire prevention control is realized. Then, a second detection observation is carried out on the isolated bins 4 where spontaneous combustion of coal can occur by using the gas detection device 5, and data is recorded. If the marked gas of the spontaneous combustion of the coal in the isolation chamber 4 or the gas causing the spontaneous combustion of the coal further rises is detected, the isolation chamber 4 is judged to need to be subjected to fire extinguishing treatment. The marked gas of coal spontaneous combustion includes carbon dioxide, sulfur dioxide or carbon monoxide. After the isolation chamber 4 in which the spontaneous combustion of the raw coal is started is judged, fire extinguishing materials such as yellow mud grouting, dry powder, sand or foam are injected into the isolation chamber 4 immediately.

The technical scheme of the invention discloses a coal mine fireproof system 10 which comprises a working roadway 1, a fireproof roadway 2 and a goaf 3, wherein the fireproof roadway 2 is positioned between the working roadway 1 and the goaf 3. A plurality of cabin partition plates 41 are arranged in the fireproof tunnel 2 at intervals, and the arrangement direction of the cabin partition plates 41 is the same as the extension direction of the fireproof tunnel 2. An isolation chamber 4 is formed between any two adjacent chamber partition plates 41, and each isolation chamber 4 is isolated from the working roadway 1 through a chamber baffle plate 42. Be equipped with gaseous detection device 5 in the fire prevention tunnel 2, gaseous detection device 5's device test end 51 is located one of them isolation bin 4, and gaseous detection device 5's device observation end 52 is located work tunnel 1. The fireproof tunnel 2 is divided into a plurality of isolation chambers 4, and the positions of fire extinguishing treatment are judged by detecting the gas in the isolation chambers 4. Therefore, the treatment efficiency is improved, and the labor intensity of workers is reduced.

In one embodiment, as shown in fig. 1-2 and 5, a temperature monitoring device 6 is arranged in the fireproof tunnel 2, a device sensing end 61 of the temperature monitoring device 6 is positioned in one of the isolation chambers 4, and a device monitoring end 62 of the temperature monitoring device 6 is positioned in the working tunnel 1.

Still be provided with temperature monitoring device 6 in the fire prevention tunnel 2, temperature monitoring device 6 has device response end 61 and device and monitors end 62. The device sensing end 61 is used for sensing temperature, and the device monitoring end 62 is used for observing temperature data by workers. The device induction end 61 is positioned in the isolation chamber 4, and the device monitoring end 62 is positioned in the working roadway 1. The staff can judge the isolation bin 4 that needs to put out a fire through temperature data combination gas content data more accurately. When testing the temperature, the worker can extend the device sensing terminal 61 into the isolation chamber 4 from the baffle through hole 421.

Optionally, a plurality of temperature monitoring devices 6 are arranged in the fireproof tunnel 2, and each isolation cabin 4 corresponds to one temperature monitoring device 6.

In one embodiment, as shown in fig. 1-2 and 4, a seal coating 43 is disposed between the chamber shield 42 and the worklane 1. After the cabin baffle 42 is installed, the worker sprays a sealing material on the surface of the cabin baffle 42 to form a sealing coating 43, the isolation cabin 4 is isolated from the working roadway 1, and oxygen in the working roadway 1 is prevented from entering the isolation cabin 4 to mislead judgment of the worker.

Optionally, the sealing coating 43 is made of a fire-resistant material, such as sand-gravel slurry or the like.

In one embodiment, as shown in fig. 1-2 and 4, a hydraulic mount 7 is provided within each isolation chamber 4. The hydraulic support 7 comprises a bearing top plate 71, a shield plate 72, a connecting rod 73, a bearing bottom plate 74 and a hydraulic upright post 75, wherein one end of the shield plate 72 is connected with the bearing top plate 71, the connecting rod 73 is pivoted between the other end of the shield plate 72 and the bearing bottom plate 74, and the hydraulic upright post 75 is supported between the bearing top plate 71 and the bearing bottom plate 74. The plenum shield 42 is disposed between the load bearing top plate 71 and the load bearing bottom plate 74.

In particular, a hydraulic support 7 is provided in each isolation chamber 4. The hydraulic support 7 is an instrument for supporting the roadway. The hydraulic support 7 is composed of a bearing top plate 71, a shield plate 72, a connecting rod 73, a bearing bottom plate 74 and a hydraulic upright 75. The load floor 74 rests on the bottom wall of the isolation chamber 4 and the load ceiling 71 supports the top wall of the isolation chamber 4. The plenum shield 42 is disposed between the load bearing top plate 71 and the load bearing bottom plate 74. Hydraulic support 7 supports fire protection tunnel 2, avoids taking place to collapse to for bin baffle 42 provides the mounted position, reduced the cost of installing bin baffle 42.

In one embodiment, as shown in FIG. 4, a support rod 76 is connected between the hydraulic column 75 and the chamber shield 42. The hydraulic upright 75 is connected between the bearing top plate 71 and the bearing bottom plate 74, the support rod 76 is connected to the hydraulic upright 75, and the support rod 76 is connected with the chamber baffle 42 and used for supporting the chamber baffle 42, so that the chamber baffle 42 is more firmly installed.

Alternatively, the support rod 76 is a hydraulic cylinder having a cylinder sleeve 761 and a cylinder piston 762, the cylinder piston 762 being inserted into the cylinder sleeve 761 and slidably connected to the cylinder sleeve 761, and the chamber barrier 42 being connected to the cylinder piston 762. The oil cylinder piston 762 can drive the chamber baffle 42 to move, so that the position can be adjusted, and the adjustment of workers is facilitated.

In one embodiment, as shown in fig. 2, a first fire barrier 8 is provided between the shield panels 72 and the gob 3. The shield plate 72 is connected with a first fireproof interlayer 8 which isolates the isolation chamber 4 from the gob 3. On one hand, oxygen in the goaf 3 is prevented from entering the isolation chamber 4, and on the other hand, when fire in the isolation chamber 4 is prevented, the fire spreads into the goaf 3.

In one embodiment, as shown in fig. 2, a second fire barrier 9 is provided between the bearing top plate 71 and the top wall of the fire-proof roadway 2. The top wall of the fireproof tunnel 2 is the top wall of the isolation chamber 4. A second fireproof interlayer 9 is arranged between the bearing top plate 71 and the top wall of the fireproof tunnel 2. The sealing performance of the isolation chamber 4 is improved, and the influence of fire on the top wall of the fireproof roadway 2 is avoided when a fire breaks out.

Optionally, the first fire barrier 8 and the second fire barrier 9 are fire-proof protective films, and the first fire barrier 8 and the second fire barrier 9 are integrally formed.

As shown in fig. 1-5, the technical solution of the present invention provides a fire extinguishing method for coal mine, including a fire extinguishing step of extinguishing fire by using the coal mine fire protection system 10 of any one of the above, the fire extinguishing step including,

s01: each isolation chamber 4 is inspected and observed by a gas inspection device 5.

S02: and judging the isolation chamber 4 needing fire extinguishing treatment.

S03: the fire extinguishing material is injected into the isolation chamber 4 to be extinguished.

For the detailed structure and function of the coal mine fire protection system 10, reference is made to the related contents in the foregoing description, and further description is omitted here.

The coal mine fire extinguishing method can improve the fire extinguishing efficiency. The coal mine fire protection system 10 is provided under a coal mine. Wherein the fireproof tunnel 2 is divided into a plurality of isolation chambers 4.

The worker detects each of the isolation chambers 4 by using the gas detection device 5, and detects the gas in the isolation chamber 4. Judging the isolation chamber 4 needing fire extinguishing treatment according to the type and the content of the gas, and then quickly injecting fire extinguishing materials into the isolation chamber 4 needing fire extinguishing treatment.

Alternatively, the staff may use the gas detection device 5 to sequentially detect a plurality of isolation chambers 4.

Optionally, a gas detection device 5 is disposed in each isolation chamber 4, so that a worker can detect a plurality of isolation chambers 4 in real time.

In one embodiment, step S01 includes S011: a first fire barrier 8 is provided between each insulation chamber 4 and the gob 3.

S012: nitrogen is injected into the gob 3.

Specifically, have hydraulic support 7 in the isolation bin 4, set up first fire prevention interlayer 8 between hydraulic support 7 and collecting space area 3, avoid the intensity of a fire in the isolation bin 4 to propagate to in isolating collecting space area 3. Wherein the first fireproof interlayer 8 is a fireproof protective film. And nitrogen is injected into the gob 3 to dilute the gas concentration which can cause spontaneous combustion of coal such as oxygen in the gob 3, so that the possibility of spontaneous combustion of the gob 3 is reduced, and the amount of oxygen entering the isolation bin 4 from the gob 3 is also reduced.

In one embodiment, step S011 includes S0111: and a second fireproof interlayer 9 is arranged between the hydraulic support 7 in each isolation chamber 4 and the top wall of the fireproof roadway 2.

Specifically, hydraulic support 7 is arranged in isolation chamber 4, and second fireproof interlayer 9 is located between hydraulic support 7 and the top wall of fireproof roadway 2. The second fireproof interlayer 9 is a fireproof protective film, and the influence of fire in the isolation chamber 4 on the top wall of the fireproof roadway 2 is avoided.

In one embodiment, step S02 includes S021: judging an isolation bin 4 which is likely to generate coal spontaneous combustion through detection;

s022: injecting nitrogen into the isolation bin 4 which is likely to generate coal spontaneous combustion by using a nitrogen injection device;

s022: and detecting and observing the isolation chamber 4 which possibly generates spontaneous combustion of coal again through the gas detection device 5, comparing data of the two detection and observation, and determining the isolation chamber 4 which needs to be subjected to fire extinguishing treatment.

In the step of determining the isolation chamber 4 that needs to be fire-extinguishing, the data detected by the gas detection device 5 for the first time is analyzed to determine the isolation chamber 4 that may cause spontaneous combustion of coal. Which can be judged according to the content of oxygen, acetylene or ethylene in the insulation chamber 4. Then, nitrogen is injected into the isolation chamber 4 which is likely to generate the coal spontaneous combustion condition, so that the nitrogen inerts the gas in the isolation chamber 4, and the coal spontaneous combustion possibility is reduced. The gas detection device 5 is then used to detect the isolated bin 4 where spontaneous combustion of the coal may occur. And comparing the data detected twice, analyzing the isolation chamber 4 needing fire extinguishing treatment, and immediately carrying out fire extinguishing operation. Whether the fire extinguishing treatment is needed or not can be judged by detecting whether the spontaneous combustion marked gas such as carbon dioxide, sulfur dioxide or carbon monoxide exists or not or whether the content of the spontaneous combustion gas caused by oxygen, acetylene or ethylene further rises or not.

In one embodiment, step S03 includes that S031: a baffle through hole (not shown) is arranged on a chamber baffle 42 of the isolation chamber 4 needing fire extinguishing treatment, and an injection end of a fire extinguishing device extends into the isolation chamber 4 needing fire extinguishing through the baffle through hole.

After the isolation chamber 4 needing fire extinguishing treatment is determined, a chamber baffle plate 42 of the isolation chamber 4 is rapidly drilled with a drilling machine to form a baffle through hole, and then a fire extinguishing device is used for injecting fire extinguishing materials into the isolation chamber 4 through the baffle through hole to extinguish fire.

In one embodiment, step S031 includes that S0311: partition through holes (not shown) are formed in two partition plates 41 of the isolation chamber 4 to be subjected to fire extinguishing treatment, and the injection end of the fire extinguishing device is inserted into the isolation chamber 4 to be subjected to fire extinguishing through the partition through holes.

In order to accelerate the fire extinguishing speed, partition through holes are drilled out respectively by using a drilling machine for two partition boards 41 of the isolation chamber 4 needing fire extinguishing treatment, and then fire extinguishing materials are injected into the isolation chamber 4 through the partition through holes by using a fire extinguishing device, so that the fire extinguishing efficiency is accelerated.

The invention also provides a coal mine withdrawing method, which comprises a withdrawing method for withdrawing equipment by using the coal mine fireproof system 10, wherein the withdrawing step comprises the following steps:

s11: the chamber closure 42 of one of the insulation chambers 4 is removed.

S12: fill material is injected into the isolation plenum 4 from which the plenum dam 42 is removed.

S13: the chamber baffle 42 of the other isolation chamber 4 is removed and the filler material is injected inwardly.

So set up, demolish the recovery one by one with a plurality of isolation bins 4 for when withdrawing, collecting space area 3 keeps apart with work tunnel 1 all the time.

In one embodiment, step S11 further includes step S111: the hydraulic support 7 in the isolation chamber 4 is removed and recovered.

S112: the compartment partition 41 isolating the compartment 4 is removed and recovered.

Therefore, the hydraulic support 7 and the chamber partition plate 41 can be repeatedly used, and the cost is reduced.

In summary, the invention provides a coal mine fireproof system, which comprises a working roadway, a fireproof roadway and a goaf, wherein the fireproof roadway is positioned between the working roadway and the goaf. The fireproof tunnel is internally provided with a plurality of cabin partition plates at intervals, and the arrangement direction of the cabin partition plates is the same as the extension direction of the fireproof tunnel. An isolation bin is formed between any two adjacent bin clapboards, and each isolation bin is isolated from the working roadway through a bin baffle. A gas detection device is arranged in the fireproof roadway, the device detection end of the gas detection device is positioned in one of the isolation cabins, and the device observation end of the gas detection device is positioned in the working roadway. The fire protection roadway is divided into a plurality of isolation chambers, so that workers can conveniently determine the position of spontaneous combustion of coal.

The invention also provides a coal mine fire extinguishing method which comprises a fire extinguishing step of extinguishing fire by using the coal mine fire prevention system, wherein the fire extinguishing step comprises the step of detecting and observing each isolation chamber through the gas detection device. And judging the isolation chamber needing fire extinguishing treatment. And injecting fire extinguishing material into the isolation chamber needing fire extinguishing. Because the coal mine fire protection system can rapidly judge the spontaneous combustion position of coal, the spontaneous combustion position can be rapidly extinguished, and the extinguishing efficiency is improved.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.