CN114961825B - Pressure-equalizing fire prevention control system and fire prevention method for outburst coal seam excavation working face - Google Patents
Pressure-equalizing fire prevention control system and fire prevention method for outburst coal seam excavation working face Download PDFInfo
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- CN114961825B CN114961825B CN202210888547.4A CN202210888547A CN114961825B CN 114961825 B CN114961825 B CN 114961825B CN 202210888547 A CN202210888547 A CN 202210888547A CN 114961825 B CN114961825 B CN 114961825B
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- 238000012544 monitoring process Methods 0.000 claims abstract description 13
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- 238000012806 monitoring device Methods 0.000 claims description 21
- 238000005065 mining Methods 0.000 claims description 12
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
- E21F1/12—Devices for automatically opening air doors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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Abstract
The invention discloses a pressure-equalizing fire prevention control system and a fire prevention method for a outburst coal seam excavation working face, and relates to the field of ventilation of mines or tunnels. Wherein control system includes air intake lane accuse wind subassembly: the air supply device comprises an air inlet door, an air inlet and a quantitative air supply device through the air inlet; return airway accuse wind subassembly: the air return door, the air return opening and the adjusting device for adjusting the exhaust air quantity through the air return opening are arranged; the system comprises a monitoring control system, a signal acquisition unit, a control processor and a manual control device for opening the door instantly. The system constructs a pressure-equalizing ventilation system through a special structure and control logic, ensures the ventilation air quantity required by a working surface, and prevents toxic and harmful gases from flowing into the working surface; the pressure-sharing air door is opened in the twinkling of an eye when the outburst gas occurs, full wind pressure ventilation is realized, the reversal of a large amount of outburst gas is avoided, and the problem that the pressure-sharing fire prevention and extinguishing measures cannot be used for the working face of the outburst coal seam is solved.
Description
Technical Field
The invention relates to the field of ventilation of mines or tunnels, in particular to a pressure-equalizing fire prevention control system and a fire prevention method for a outburst coal seam excavation working face.
Background
The outburst coal seam is a special structure coal seam containing special gas gushing, namely, under the action of pressure, broken coal and gas are suddenly sprayed out from a coal body to a mining space in large quantity. The coal seam needs special attention to the problems of gas emission and the like during excavation. Generally, no air control device is arranged in the air inlet roadway and the air return roadway, namely, the gas cannot be discharged in time after the gas in the outburst coal seam is sprayed out. However, along with the formation of the goaf and other situations, gas such as gas can continuously leak from the coal body to the mining space, and especially if the air pressure of the mining working face is small and other places are in a high-pressure environment, the gas can continuously enter.
Therefore, the fire prevention of the outburst coal seam is contradictory, if the ventilation is carried out in time, the air pressure of the excavation space is lower, and other high-pressure gas can continuously enter; and if the fire prevention mode of accuse wind is carried out, then the gas content in the tunnel also can be increased to the sudden blowout of gas in the outstanding coal seam, and still can be accompanied with the shock wave along with the sudden blowout of gas, also can be to the very big impact of accuse wind device, and then lead to other risk hidden dangers.
Disclosure of Invention
The invention provides a pressure-equalizing fire-preventing control system and a pressure-equalizing fire-preventing control method for a mining working face of a outburst coal seam, aiming at solving the problem that the pressure-equalizing fire-preventing fire.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a pressure-equalizing fire prevention control system for a outburst coal seam mining working face, which comprises an air inlet roadway air control assembly, an air return roadway air control assembly and a monitoring control system;
air intake lane accuse wind subassembly includes: the air supply device comprises an air inlet door, an air inlet and a quantitative air supply device through the air inlet;
the return airway wind control assembly comprises: the air return door, the air return opening and the adjusting device for adjusting the exhaust air quantity through the air return opening are arranged;
the air pressure of the return airway in front of the return airway air control assembly is not more than 5% of the air pressure of the air inlet airway behind the air inlet airway air control assembly;
the air inlet door and the air return door are respectively provided with an instant opening door which allows air flow to pass through instantly without obstacles;
the monitoring control system includes: the signal acquisition unit is electrically connected with the control processor and is used for acquiring signals in the roadway; the control processor is used for controlling the instant opening door to be opened after processing the data of the signal acquisition unit; the manual control device is used for simultaneously opening the intake roadway instantaneous opening door and the return roadway instantaneous opening door;
the signal acquisition unit includes:
arranging a first gas monitoring device and a first shock wave monitoring device at the air inlet roadway at the position which is windward and M away from the stoping line;
a second gas monitoring device and a second shock wave monitoring device are arranged at the position, which is in the air return tunnel, below the stoping line and is N away from the stoping line;
and a third gas monitoring device is arranged at the position which is always at the downwind position of the coal wall and is L away from the coal wall in the air return tunnel.
Further, the opening mode of the instant opening door is as follows: before the instant opening door is opened, the instant opening door is in an unstressed state and is opened by means of the gravity of the instant opening door.
Further, when the instant door is in the fully closed state, the top end of the instant door is subjected to the releasable pulling force controlled by the control processor and simultaneously subjected to the pushing force of the compression spring.
The instant opening door can be a folding door which is transversely arranged; the folding door comprises a windward side and a leeward side; the vertical edges on the two sides of the leeward side of the folding door are respectively abutted against the doorposts on the two sides.
Wherein, the folding door comprises a laminated plate hinged by a plurality of shafts; the two ends of the sliding shaft on one side of the folding door are embedded in the sliding ways of the doorposts through pulleys respectively. It is also possible to let the top end of the folding door comprise: the sliding block slides in the slide way and is hinged with the laminated plate; the armature iron arranged at the top end of the sliding block and the fixed electromagnet attract each other to generate a pulling force.
The electromagnet is fixed on the top beam, and the top beam is transversely erected at the top of the door post.
Still further, the distance M and the distance N range from 0 to 20 meters, and the distance L range from 10 to 15 meters.
Furthermore, the air supply device is connected with an external fan, and the air supply quantity of the fan is a fixed value.
Furthermore, the adjusting device is a manual adjusting valve for adjusting the actual air output of the air return inlet.
In a second aspect, the invention provides a fire protection method based on the pressure-equalizing fire protection control system for the extraction working face of the outburst coal seam, which comprises the following steps:
step 1, system self-checking, which comprises checking states of an air inlet tunnel air control assembly and an air return tunnel air control assembly;
step 2, adjusting the air pressure of the return airway not to exceed 5% of the air pressure of the air intake airway;
step 3, based on the step 2, if the signal acquisition unit detects that the gas content in the air inlet roadway, the working face and the return airway exceeds 3%, the monitoring control system immediately opens the instant opening door;
step 4, based on the step 2, if the signal acquisition unit continuously detects the shock waves and the shock wave interval does not exceed the time T, the monitoring control system immediately starts the instant opening door; otherwise, the instantaneous opening door keeps a closed state;
and 5, based on the step 2, if the personnel need to overhaul or ventilate emergently, starting the manual control device, and simultaneously starting the air inlet roadway instantaneous opening door and the air return roadway instantaneous opening door.
Further, the state in step 1 includes: checking the power supply condition of the system; further comprising checking whether the instant opening door is in a closed state.
Compared with the prior art, the invention has the following beneficial effects: through a special door structure and control logic, stable positive pressure and certain pressure difference are always kept in a coal mine, and the problem that a uniform-pressure fire prevention and extinguishing measure cannot be used on a working face of an outburst coal seam during mining is solved; the ventilation regulation is implemented to reduce air leakage to the goaf and inhibit spontaneous combustion of coal by not only facilitating the discharge of gas such as gas, but also preventing the gas in the coal seam cracks from leaking by utilizing a positive pressure environment under the condition of ensuring the ventilation air quantity required by the working face; more importantly, the following problems are solved: because accidents such as outstanding lead to the gas content too high in the tunnel in the outstanding coal seam, and when unable quick the excretion, can cancel the voltage-sharing mode at once, keep the full circulation of air in the tunnel, and open the door in the twinkling of an eye after, also because the malleation environment in the tunnel can be fastest discharge a large amount of gas that produce outstanding, prevent that the conflagration from taking place.
Drawings
FIG. 1 is a schematic view of a roadway layout for excavating a prominent coal field;
FIG. 2 is a schematic layout of an air inlet door and an air inlet in an air intake lane;
FIG. 3 is a schematic view showing the arrangement of the return air door and the return air inlet in the return air tunnel;
FIG. 4 is a schematic view of the structure of a folding door, a slider and a door post;
FIG. 5 is a schematic view of the connection of the doorpost, the pulley, the slider and the sliding shaft;
FIG. 6 is a schematic diagram of the electrical connections of the supervisory control system of the present invention.
In the figure, 1 main lane, 21 air inlet lane, 211 air inlet, 212 air return inlet, 22 goaf, 23 working face, 24 air return lane, 25 stoping line, 311 first gas monitoring device, 312 first shock wave monitoring device, 321 second gas monitoring device, 322 second shock wave monitoring device, 331 third gas monitoring device, 4 coal field, 51 air inlet door, 52 air return door, 61 door post, 611 slideway, 62 top beam, 71 folding door, 711 laminated plate, 712 sliding shaft, 713 articulated shaft, 714 slide block, 715 pulley, 72 armature, 81 electromagnet, 82 spring.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Generally, the structure of the shock wave generated after the protrusion is multi-level, but due to various complex factors such as certain bending of the roadway or the inner wall of the roadway, the shock wave is propagated, and then the extruded air vibrates and propagates like a water wave. Thus, the shock wave in the roadway appears as an array of impacts.
Fig. 1 is a schematic illustration of coal extraction, leaving a gob 22 behind the hydraulic supports as the face 23 advances over the field 4. Meanwhile, fresh air from the main lane 1 enters the air inlet lane 21 through the fan, then passes through the working face 23 and then enters the air return lane 24; the wind in the return airway 24 will again be exhausted through the dedicated equipment in the main airway 1.
Due to the special structure of the outburst coal seam, in order to better utilize the voltage-sharing fire prevention and extinguishing technology, the invention provides a voltage-sharing fire prevention control system for the excavation working face of the outburst coal seam, which comprises an air inlet tunnel air control assembly, an air return tunnel air control assembly and a monitoring control system; the effect of air inlet lane accuse wind subassembly and return air lane accuse wind subassembly is for: the cooperation of the two ensures that the air inlet lane 21, the working face 23 and the return air lane 24 keep the large air pressure compared with the large lane 1, and the air pressure of the return air lane in front of the return air lane air control assembly is not more than 5 percent of the air pressure of the air inlet lane behind the air inlet lane air control assembly. The 5% wind pressure difference is mainly used for keeping the pressure in the excavation roadway to be positive pressure, so that the gas in the hidden outburst cracks can be pressed back to the cracks of the coal bed again, and the gas is prevented from diffusing into the roadway.
In order to form positive pressure, as shown in fig. 2 and 3, the air intake tunnel wind control assembly includes: the air inlet door 51 and the air inlet 211 of the air inlet lane 21, and the air supply device for quantitatively supplying air through the air inlet 211, wherein the air supply device can be a fresh air fan, the air supply device is connected with an external fan, and the air supply amount of the fan is a fixed value. The return airway wind control assembly comprises: the air return door 52 and the air return opening 212, and a regulating device for regulating the exhaust air quantity through the air return opening 212; the regulating device is a structure similar to a manual valve, and the ventilation flow is changed by changing the effective ventilation sectional area.
When an abnormal accident such as a coal seam outburst occurs, the abnormal accident is accompanied by shock waves and a large amount of gas, and therefore, the air inlet door 51 and the air return door 52 are both provided with instant opening doors which allow airflow to pass through instantly without obstacles. The instant door is opened immediately upon exceeding a normal threshold, for example, the gas content exceeds 3% or the occurrence of a shock wave is detected.
As shown in fig. 2, 3, 4 and 5, the structure of the instant opening door may be some doors having an instant opening function, such as: the bottom of the door plate is hinged with the door frame, and when the instant opening door is in a full-closed state, the top end of the instant opening door is acted by the acting force controlled by the control processor; this force may be: a releasable pulling force, and a pushing force of the compression spring 82 to which the tip of the instantaneous door is subjected. When detecting the shock wave, the door plant can utilize the gravity of self to realize opening in the twinkling of an eye. The removable pulling force comprises a mechanical structure such as a bolt connection or a ratchet structure, but the best structure is an electromagnet 81, and the electromagnet 81 can also meet the requirement that when power is cut off, the folding door 71 can be automatically opened, so that gas accumulation in a roadway is avoided.
In summary, the opening mode of the instant opening door is as follows: when the instant opening door is in an unstressed state, the instant opening door can be opened by means of the gravity of the instant opening door.
The structure of the instant opening door can also adopt a folding structure as shown in fig. 4, the instant opening door is a transversely arranged folding door 71, and the folding door 71 is formed by hinging a plurality of folding plates 711 and hinging shafts 713; the whole body can be folded and unfolded, and can be opened quickly by utilizing self weight because of heavy force. Two ends of a sliding shaft 712 on one side of the folding door 71 are respectively embedded in the slide rail 611 of the door post 61 through a pulley 715, and the slide rail 611 ensures the stable operation of the folding door 71.
Because the tunnel compares major lane 1 and has certain wind pressure, consequently folding door 71 includes windward side and leeward side, and the windward side is towards the tunnel all the time, and the leeward side then is towards major lane 1, and the perpendicular limit of folding door 71 leeward side both sides supports respectively on the gatepost 61 of both sides, and after the shock wave appeared, this kind of arrangement let gatepost 61 support for folding door 71, prevents folding door 71's damage.
Similarly, the folding door 71 also conforms to the characteristics of an instant opening door, which is in an unstressed state before being opened by its own weight. When the instantaneous door is in the fully closed state, the top end of the instantaneous door is subjected to the releasable pulling force controlled by the control processor and simultaneously subjected to the pushing force of the compression spring 82.
The top end of the folding door 71 further includes: a sliding block 714 sliding in the sliding rail 611, wherein the sliding block 714 is hinged with the laminated plate 711; the armature 72 arranged at the top end of the sliding block 714 and the fixed electromagnet 81 attract each other to generate a pulling force. As shown in fig. 2 or 3, the electromagnet 81 is fixed to the top beam 62, and the top beam 62 is transversely erected on the top of the door post 61.
Fig. 6 is an electrical connection schematic diagram of the monitoring control system of the present invention, and the signal detection system in this embodiment includes: the device comprises a signal acquisition unit, a control processor, an opening device with an instant opening door and a manual control device.
The signal acquisition unit is: a signal acquisition unit electrically connected with the control processor and used for acquiring signals in the roadway, such as a gas sensor for detecting the gas content; the device for detecting the shock wave is further included, and the specific detection device can refer to the existing structures such as a shock wave sensor and the like and other technologies for detecting the shock wave of the coal mine. For better detection gas, signal acquisition unit includes: a first gas monitoring device 311 and a first shock wave monitoring device 312 are arranged on the air inlet lane 21 and at a position which is windward from the stoping line 25 and is M away from the stoping line 25;
in the return airway 24, a second gas monitoring device 321 and a second shock wave monitoring device 322 are arranged at positions which are downwind of the stoping line 25 and are N away from the stoping line 25;
in the return airway 24, a third gas monitoring device 331 is always provided at a position L away from the coal wall and downstream of the coal wall.
When the working surface 23 advances by a certain distance, the third gas monitoring device 331 is also correspondingly moved to the corresponding position. Wherein the range of the distance M and the distance N is 0-20M, and the range of the distance L is 10-15M.
The control processor is: and the collected signals are calculated and judged and then output to an actuator for controlling the opening device of the instant door. In this embodiment, a single chip microcomputer is used as a use example.
The opening device is: the device capable of controlling the instantaneous opening of the instantaneous opening door takes the electromagnet 81 as an example, namely: controlling the de-energization of the electromagnet 81. If the plug structure is adopted, the pulling-out of the plug is controlled.
The manual control device is: the device for manually controlling the simultaneous opening of the instantaneous door of the air intake lane 21 and the instantaneous door of the return air lane 24 is, in a specific embodiment, as follows: the folding door 71 is instantaneously opened. The manual control device is electrically connected with the control processor, and can forcibly execute a command to the control processor to enable the opening device to directly work.
The working principle is as follows: when the positive pressure environment needs to be maintained in the roadway, the air inlet door 51 and the air return door 52 are closed. At the same time, the control processor supplies power to the electromagnet 81, and the armature 72 of the sliding block 714 on the folding door 71 and the electromagnet 81 are mutually contacted and attracted by a manual or other device, and in the process, the spring 82 is continuously pressed. After the electromagnet 81 attracts the armature 72, the spring 82 is always in a pressed state.
When the gas content in the roadway exceeds 3%, which indicates that a normal exhaust system is not enough to exhaust gas, the control processor immediately cuts off the power of the electromagnet 81, the spring 82 can extrude the sliding block 714 to enable the instant door to flash out a certain gap, and the folding door 71 can instantly fall down by utilizing gravity by utilizing the gap.
If there are accidents such as outstanding in the tunnel, because reasons such as the structure in tunnel, the shock wave can continuously strike folding door 71, and after the first impact was produced, control processor can get into the timing mode, if sense the second time shock wave in time T, then will folding door 71 open in the twinkling of an eye. The time T can be selected according to actual determination in the field, and can also be set to 3 seconds. The primary purpose of this design is to distinguish between the shock wave generated by a burst slope on the face 23 and the shock wave generated by a coal seam projection.
The fire prevention and extinguishing method based on the pressure-equalizing fire prevention control system of the outburst coal seam excavation working face comprises the following steps:
step 1, system self-checking, which comprises checking states of an air inlet tunnel air control assembly and an air return tunnel air control assembly; specifically, the method includes: checking the power supply condition of the system and the working state of the equipment; further comprising checking whether the instant opening door is in a closed state.
And 2, adjusting the air pressure of the return airway not to exceed 5% of the air pressure of the air intake airway.
And 3, based on the step 2, if the signal acquisition unit detects that the gas content in the air inlet lane 21, the working face 23 and the return air lane 24 exceeds 3%, the monitoring control system immediately opens the instant opening door.
Step 4, based on the step 2, if the signal acquisition unit continuously detects the shock waves and the shock wave interval does not exceed the time T, the monitoring control system immediately starts the instant opening door; otherwise, the instantaneous opening door keeps a closed state.
And 5, based on the step 2, if the personnel need to overhaul or ventilate emergently, the manual control device is started, and the air inlet lane 21 instant door and the air return lane 24 instant door are simultaneously started.
The present invention has been described above based on the embodiments and the modified examples, but the embodiments of the aspects described above are examples for facilitating understanding of the present invention and are not intended to limit the present invention. All changes, modifications and equivalents coming within the spirit and terms of the invention and claimed herein are intended to be embraced therein. In addition, if technical features thereof are not described as indispensable in the present specification, appropriate deletion may be performed.
Claims (12)
1. A pressure-equalizing fire-proof control system for a mining working face of a outburst coal seam is characterized by comprising an air inlet tunnel air control assembly, an air return tunnel air control assembly and a monitoring control system;
air intake lane accuse wind subassembly includes: the air supply device comprises an air inlet door (51), an air inlet (211) and an air supply device for quantitatively supplying air through the air inlet (211);
the return airway wind control assembly comprises: the air return door (52) and the air return opening (212) and a regulating device for regulating the exhaust air quantity through the air return opening (212);
the air pressure of the return airway in front of the return airway air control assembly is not more than 5% of the air pressure of the air inlet airway behind the air inlet airway air control assembly;
instantaneous doors allowing air flow to pass through instantly without obstacles are arranged on the air inlet door (51) and the air return door (52);
the monitoring control system includes: the signal acquisition unit is electrically connected with the control processor and is used for acquiring signals in a roadway, and the control processor is used for controlling the instant opening door to open after processing the data of the signal acquisition unit; the device also comprises a manual control device for simultaneously opening an instant door of the air inlet lane (21) and an instant door of the air return lane (24);
the signal acquisition unit includes:
a first gas monitoring device (311) and a first shock wave monitoring device (312) are arranged on the air inlet lane (21) at the position which is windward of the mining stopping line (25) and is M away from the mining stopping line (25);
a second gas monitoring device (321) and a second shock wave monitoring device (322) are arranged at the position of the return airway (24) which is arranged at the downwind of the stoping line (25) and is N away from the stoping line (25);
and a third gas monitoring device (331) is arranged at the position of the return airway (24) which is always at the downwind position of the coal wall and is L away from the coal wall.
2. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 1, wherein: the opening mode of the instant opening door is as follows: before the instant opening door is opened, the instant opening door is in an unstressed state and is opened by means of the gravity of the instant opening door.
3. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 2, wherein: when the instantaneous opening door is in a fully closed state, the top end of the instantaneous opening door is subjected to the releasable pulling force controlled by the control processor and simultaneously subjected to the pushing force of a compression spring (82).
4. The outburst coal seam mining face pressure equalizing and fire preventing control system of claim 2 or 3, wherein: the instant opening door is a folding door (71) which is transversely arranged; the folding door (71) comprises a windward side and a leeward side; the vertical edges on the two sides of the leeward side of the folding door (71) are respectively abutted against the doorposts (61) on the two sides.
5. The pressure-equalizing fire control system for the extraction working surface of the outburst coal seam as claimed in claim 4, wherein: the folding door (71) comprises: a stack (711) hinged by several axes; two ends of a sliding shaft (712) at one side of the folding door (71) are respectively embedded in the slide ways (611) of the door columns (61) through pulleys (715).
6. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 5, wherein: the top end of the folding door (71) further comprises: a sliding block (714) sliding in the sliding way (611), wherein the sliding block (714) is hinged with the laminated plate (711); an armature iron (72) arranged at the top end of the sliding block (714) and a fixed electromagnet (81) are mutually attracted to generate a pulling force.
7. The pressure-equalizing fire control system for the extraction working surface of the outburst coal seam as claimed in claim 6, wherein: the electromagnet (81) is fixed on the top beam (62), and the top beam (62) is transversely erected at the top of the door post (61).
8. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 1, wherein: the distance M and the distance N range from 0 to 20 meters.
9. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 1, wherein: the distance L ranges from 10-15 meters.
10. The pressure-equalizing fire control system for the extraction face of the outburst coal seam as claimed in claim 1, wherein: the adjusting device is a manual adjusting valve for adjusting the actual air output of the air return inlet (212).
11. A fire protection method based on the outburst coal seam mining face voltage-sharing fire protection control system of any one of claims 1 to 10, wherein: the method comprises the following steps:
step 1, system self-checking, which comprises checking states of an air inlet tunnel air control assembly and an air return tunnel air control assembly;
step 2, adjusting the air pressure of the return airway not to exceed 5% of the air pressure of the air intake airway;
step 3, based on the step 2, if the signal acquisition unit detects that the gas content in the air inlet lane (21), the working face (23) and the air return lane (24) exceeds 3%, the monitoring control system immediately starts the instant opening door;
step 4, based on the step 2, if the signal acquisition unit continuously detects the shock waves and the shock wave interval does not exceed the time T, the monitoring control system immediately starts the instant opening door; otherwise, the instantaneous opening door keeps a closed state;
and 5, based on the step 2, if the personnel need to overhaul or ventilate emergently, the manual control device is started, and the instantaneous door of the air inlet lane (21) and the instantaneous door of the air return lane (24) are simultaneously started.
12. The fire protection method of the pressure equalizing fire protection control system for the outburst coal seam mining face according to claim 11, wherein the fire protection method comprises the following steps: the state in step 1 includes: checking the power supply condition of the system; further comprising checking whether the instant opening door is in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210888547.4A CN114961825B (en) | 2022-07-27 | 2022-07-27 | Pressure-equalizing fire prevention control system and fire prevention method for outburst coal seam excavation working face |
Applications Claiming Priority (1)
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| CN109252884B (en) * | 2018-09-13 | 2020-01-07 | 辽宁工程技术大学 | Gob-side entry retaining working face Y-shaped ventilation pressure regulating disaster prevention method |
| CN109779670B (en) * | 2018-11-28 | 2020-09-08 | 中国矿业大学 | Underground rapid fireproof anti-explosion pressure-bearing airtight composite structure and implementation method |
| CN110630332A (en) * | 2019-11-14 | 2019-12-31 | 辽宁工程技术大学 | Coal face coal and gas outburst alarm system based on images |
| CN111594252B (en) * | 2020-05-26 | 2022-06-10 | 辽宁工程技术大学 | Prevention and control system and prevention and control method for spontaneous combustion of coal in goaf during mining of extremely spontaneous combustion coal seam |
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Effective date of registration: 20230628 Address after: 221000 West unit, 8th floor, building 8, Xuzhou Software Park, No. 6, Software Park Road, Quanshan District, Xuzhou City, Jiangsu Province Patentee after: XUZHOU JI'AN MINING TECHNOLOGY Co.,Ltd. Address before: 221116 No. 1 Tongshan University Road, Xuzhou City, Jiangsu Province Patentee before: CHINA University OF MINING AND TECHNOLOGY |