CN110847964B - Tunnel gas concentration remote real-time monitoring and emergency processing device and method - Google Patents
Tunnel gas concentration remote real-time monitoring and emergency processing device and method Download PDFInfo
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- CN110847964B CN110847964B CN201911117824.6A CN201911117824A CN110847964B CN 110847964 B CN110847964 B CN 110847964B CN 201911117824 A CN201911117824 A CN 201911117824A CN 110847964 B CN110847964 B CN 110847964B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 239000003086 colorant Substances 0.000 claims abstract description 4
- 238000009412 basement excavation Methods 0.000 claims description 9
- 238000004880 explosion Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 82
- 238000010276 construction Methods 0.000 description 10
- 238000007689 inspection Methods 0.000 description 6
- 238000005422 blasting Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
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Abstract
The invention discloses a device and a method for remote real-time monitoring and emergency processing of tunnel gas concentration, wherein the device comprises a tile detection unit, a self-propelled arch frame vehicle and a steel rail; the tile detection units are distributed on the self-propelled arch vehicle, and the self-propelled arch vehicle moves along the steel rail; the tile detection unit comprises a body, an air inlet is formed in the body, and a gas detector is arranged in the body and used for detecting the content of gas and transmitting the content of the gas to an out-of-tunnel control room in real time; a video transmission device, an air gun, a buzzer and a signal lamp are arranged outside the body; the video transmission device can transmit the in-hole pictures to the out-of-hole control room in real time; the buzzer and the signal lamp can send out sounds with different frequencies and light with different colors to perform gas early warning.
Description
Technical Field
The invention relates to a gas concentration remote real-time monitoring and emergency treatment device suitable for a tunnel.
Background
With the development of the western major strategy of high singing, the construction of the infrastructure of China enters a new climax, especially in the large-scale construction of high-grade roads and railways in the southwest and northwest regions. The construction of roads and railways in these areas faces a prominent problem, namely that the construction of mountain-crossing and mountain-crossing tunnels is high, and these areas often encounter coal-series strata and suffer from high-pressure gas. With the increase of tunnel construction in coal-based strata in recent years, the occurrence of safety accidents tends to increase. There are two technical difficulties in building tunnels in coal-based formations: firstly, most coal-series strata contain gas, and the danger of gas explosion is faced; and secondly, the possibility of gas outburst exists in the stratum with high gas pressure, and the safety construction of the tunnel is seriously influenced.
The gas has three conditions of explosion or combustion, wherein the concentration of the gas reaches 5 to 16 percent; second, the ambient temperature; thirdly, the oxygen environment is sufficient, and explosion and combustion can occur when the oxygen concentration is more than 12 percent. And when the concentration of the gas in the air is less than 5%, the gas cannot be combusted, and when the concentration of the gas in the air is more than 16%, the gas cannot be exploded or combusted. Therefore, a gas detection device is needed to ensure the safety of people in construction, however, the existing gas detection device usually needs manual operation in a hole, and especially in the process of one-shot three-inspection (gas concentration detection before charging, before blasting and after blasting), a tile inspector needs to perform gas monitoring work near a tunnel face, and huge safety risks are hidden. Therefore, the remote and automatic safety detection of the gas tunnel has very important practical significance, but the inventor finds that the gas monitoring system adopted in the gas tunnel mainly and directly refers to the gas monitoring system in coal mine safety, and how to safely and effectively apply the gas monitoring system to tunnel construction becomes a difficult problem for tunnel constructors.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a gas concentration remote real-time monitoring and emergency treatment device suitable for a tunnel.
The invention adopts the following technical scheme:
a gas concentration remote real-time monitoring and emergency treatment device suitable for a tunnel comprises a tile detection unit, a self-propelled arch frame vehicle and a steel rail;
the tile detection units are distributed on the self-propelled arch vehicle, and the self-propelled arch vehicle moves along the steel rail; the tile detection unit comprises a body, an air inlet is formed in the body, and a gas detector is arranged in the body and used for detecting the content of gas and transmitting the content of the gas to an out-of-hole control room in real time; a video transmission device, an air gun, a buzzer and a signal lamp are arranged outside the body; the video transmission device can transmit the in-hole pictures to the out-hole control room in real time; the buzzer and the signal lamp can send out sounds with different frequencies and light with different colors to perform gas early warning.
As a further technical scheme, the body comprises a first subsection and a second subsection, the first subsection and the second subsection are connected through a steering connecting neck, the steering connecting neck is connected with the first subsection and the second subsection, automatic steering can be achieved, and air in different directions can be collected.
Further, the first sub-portion is provided with the air inlet, and the rotary propeller is arranged in the first sub-portion and can be matched with the steering connecting neck to collect air in different directions.
Further, the gas detector is arranged in the second subsection.
Furthermore, a protective net is arranged at the air inlet to filter air, so that dust is prevented from entering the air inlet, and meanwhile, safety protection is performed on flying stones generated after blasting;
as a further technical scheme, the air gun is connected with an air pump through an air conveying pipe, high-pressure air can be sprayed to dilute gas, and the air gun is used as an emergency treatment means to avoid gas combustion and explosion.
As a further technical scheme, the steel rails can be connected on site through the connecting bolts and the connecting grooves without welding, so that sparks are avoided, and meanwhile, the steel rails can be laid forwards at any time along with excavation of a tunnel face.
As a further technical scheme, the self-propelled arch frame vehicle is attached to the contour of a tunnel, and a lifting hydraulic device is arranged on a chassis and can lift at a certain height to adapt to tunnels with different excavation sections such as a full section, two steps, three steps and the like; the self-propelled arch frame vehicle can be matched with a video transmission device to travel through remote control.
As a further technical scheme, the shape of the self-propelled arch frame vehicle is matched with the contour of a tunnel, and tile detection units are arranged at the arch crown, the arch shoulder, the arch waist and the arch foot and can automatically travel under remote control; the steel rails are longitudinally paved on the tunnel face.
As a further technical scheme, various devices adopted by the tile detection unit and the self-propelled arch frame vehicle meet the explosion-proof requirement, have certain impact resistance, and can resist the influence of explosive blast waves and the impact of small splashed broken stones in the tunnel drilling and blasting excavation process.
As a further technical scheme, the video transmission device and the gas detector can transmit signals to an out-of-hole control room in real time, so that personnel outside the hole can know the conditions in the hole in time, know the gas change conditions at specific positions in the hole and remotely control the self-propelled arch truss vehicle and the tile detection unit.
As a further technical scheme, the gas detector, the buzzer and the signal lamp are in a linkage state, and the buzzer and the signal lamp can be automatically started when the gas detector detects that gas in the hole reaches a preset safety threshold; according to the set safety threshold values in different ranges, the buzzer sends out sound frequency from low to high, the sound frequency is more harsh, and the signal lamp is changed from green, yellow to red, so that safety early warning is performed.
The application method of the invention is as follows:
A. laying steel rails till the position near the tunnel face;
B. adjusting the self-propelled arch truss vehicle according to the contour and height of the tunnel, and placing the self-propelled arch truss vehicle on a steel rail;
C. installing tile detecting units at the positions of a vault, an arch shoulder, an arch waist and an arch foot on the self-propelled arch frame vehicle;
D. the tile detection unit works, the propeller in the first subsection rotates to absorb air and enters the second subsection through the steering connecting neck, the gas detector in the second subsection detects whether the gas concentration exceeds a safety threshold value or not, the gas concentration and the video information at each position are transmitted to the control room outside the tunnel in real time according to different safety threshold values, and a controller remotely controls the movement of the self-propelled arch-frame vehicle and the rotation of the steering connecting neck through the video transmission device;
E. corresponding remote control and manual processing are carried out in time according to information fed back by the tile detection unit, for example, when the tile detection unit gives an early warning, workers in a tunnel are evacuated in time through loudspeaker shouting, the air output of a fan is increased, and the like;
F. and (4) continuously repeating the steps A-E along with the excavation of the tunnel.
The invention has the beneficial effects that:
(1) the invention provides an automatic monitoring device for gas monitoring work in a tunnel, in particular to gas monitoring work at a tunnel face, and the introduction of a self-propelled arch frame vehicle, a steering connecting neck and the like saves a large amount of manpower consumption and greatly improves the working efficiency.
(2) The invention is provided with the buzzer and the signal lamp, and is linked with the gas detector, so that the early warning is simple and clear, workers can know the early warning at a glance, the safety production of the tunnel is effectively guaranteed, and the popularization and the promotion are convenient.
(3) The device has low cost, good effect and easy operation. The automation improves the gas detection precision and the construction safety degree, and the safety of workers is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a watts inspection system of the apparatus of the present invention;
FIG. 2 is a left side view of the watts inspection system of the apparatus of the present invention;
FIG. 3 is a top view of the watts inspection system of the apparatus of the present invention;
FIG. 4 is a left side sectional view of the device of the present invention.
FIG. 5 is a front view of the self-propelled archway vehicle of the present apparatus;
FIG. 6 is a left side view of the self-propelled outrigger vehicle of the apparatus of the present invention;
fig. 7 is a schematic view of a self-propelled gantry vehicle of the apparatus of the present invention in a tunnel.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only. Wherein: the system comprises a video transmission device 1, an air gun 2, a first subsection 3, a steering connecting neck 4, a second subsection 5, a buzzer 6, a signal lamp 7, an air delivery pipe 8, a protective screen 9, a propeller 10, a gas detector 11, a tile 12 detection unit 13 arch frame 14 chassis, a driving wheel 15, a connector 16, a steel rail 17, a connecting bolt 18, a connecting groove 19, a self-propelled arch frame vehicle 20 and a tunnel profile 21.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The noun explains: the tile detection unit is short for a gas detection unit.
Example 1:
as shown in fig. 1-7, a gas concentration remote real-time monitoring and emergency processing device suitable for a tunnel comprises a tile detection unit 12, a self-propelled arch vehicle 20 and a steel rail 17; the tile detection unit is provided with a video transmission device, a buzzer, a signal lamp and a gas detector. The video transmission device can transmit the in-hole pictures to the out-hole control room in real time; the buzzer and the signal lamp can emit sounds with different frequencies and light with different colors to perform gas early warning; the gas detector can collect the gas concentration in the air and transmit the gas concentration to the control room outside the tunnel in real time. The self-propelled arch truss vehicle is in a shape fitting the contour of a tunnel, and tile detection units are arranged at the arch crown, the arch shoulder, the arch waist and the arch foot and can automatically travel under remote control; the steel rails are longitudinally paved on the tunnel face.
The gas detection unit 12 comprises a body, wherein a video transmission device 1, a wind gun 2, a first branch part 3, a steering connecting neck 4, a second branch part 5, a buzzer 6, a signal lamp 7, a gas pipe 8, a protective net 9, a propeller 10, a gas detector 11 and the like are arranged on the body;
the body comprises three parts, namely a first part, a steering connecting neck 4 and a second part, wherein the first part and the second part are connected through the steering connecting neck; the first part is shown in the left part of fig. 4, the second part is shown in the right part of fig. 4, an air inlet is formed in the first part, a position shown in the left side of fig. 4 where the protective net is installed, and a propeller 10 is installed on the inner side of the air inlet; a gas detector 11 is arranged in the second branch;
the protective net 9 is arranged at the front end of the first subsection 3, so that air can be filtered, dust and the like are prevented from entering the first subsection, meanwhile, flying stones, falling stones and the like are protected, and the internal damage of an instrument is avoided; the first section 3 is provided with a propeller 10 inside, which can suck the surrounding air.
The steering neck 4 connects the first section 3 and the second section 5 and can rotate at a certain angle, so that the first section 3 can suck air around the working face in all directions.
The video transmission device 1 is arranged on the air gun 2 and can transmit video information at the working face of the tile detection unit 12 to an out-of-tunnel control room in real time; the air gun 2 is fixedly connected to the top of the first section 3 of the body, the air gun 2 is connected with an air pump through an air conveying pipe 8, compressed air is timely sprayed to dilute the gas concentration when an emergency situation such as gas gushing or mass accumulation of gas is faced, and the emergency treatment means is used for avoiding gas combustion and explosion;
a buzzer 6 and a signal lamp 7 are arranged at the top of the second part 5, a gas detector 11 is arranged in the second part, and early warning is carried out when the gas concentration is detected to exceed a threshold value; the gas detector 11, the buzzer 6 and the signal lamp 7 are in a linkage state, and when the gas detector detects that gas in the tunnel reaches a preset safety threshold value, the buzzer and the signal lamp can be automatically started; according to the set safety threshold values in different ranges, the buzzer sends out sound frequency from low to high, the sound frequency is more harsh, and the signal lamp is changed from green, yellow to red, so that safety early warning is performed.
As a further technical scheme, the video transmission device and the gas detector can transmit signals to an out-of-hole control room in real time, so that personnel outside the hole can know the conditions in the hole in time, know the gas change conditions at the specific position in the hole and remotely control the self-propelled arch truss vehicle and the tile detection unit.
The self-propelled arch vehicle 20 comprises an arch 13, a chassis 14 and a driving wheel 15; the arch-shaped frame 13 is provided with mounting openings at the arch crown, the arch shoulder, the arch waist and the arch foot, and can be provided with the tile detection unit 12. Because the density of gas is less than that of air, the tile inspection units 12 are required to be arranged at the arch crown and the arch shoulder, and the steel arch is often welded at the arch center and the arch foot, which is the main reason of gas explosion accidents, so the tile inspection units 12 are required to be arranged, and the rest positions can be flexibly adjusted according to the specific condition of gas monitoring in the tunnel; the chassis 14 is provided with a lifting hydraulic device which can lift at a certain height to adapt to tunnels with different excavation sections such as a full section, two steps, three steps and the like; the driving wheel 15 can move synchronously through remote control, and the self-propelled arch frame vehicle can move back and forth in parallel with the tunnel face.
The steel rail 17 is provided with a connector 16, and the connector 16 comprises a connecting bolt 18 and a connecting groove 19, so that the connection among the multiple sections of steel rails is realized. Welding is not needed, spark is avoided, and meanwhile, the tunnel face can be laid forwards at any time along with excavation of the tunnel face.
As a further technical scheme, various devices adopted by the tile detection unit and the self-propelled arch frame vehicle meet the explosion-proof requirement, have certain impact resistance, and can resist the influence of explosive blast waves and the impact of small splashed broken stones in the tunnel drilling and blasting excavation process.
The application method of the invention is as follows:
A. laying steel rails 17 till the position near the tunnel face;
B. adjusting the self-propelled arch truss vehicle 20 according to the tunnel profile 21 and the height, and placing the self-propelled arch truss vehicle on the steel rail 17;
C. the tile detection unit 12 is arranged at the positions of the arch crown, the arch shoulder, the arch waist and the arch foot on the self-propelled arch frame vehicle 20;
D. the tile detection unit 12 works, the propeller 10 in the first sub-portion 3 rotates to absorb air and enters the second sub-portion 5 through the steering connecting neck 4, the gas detector 11 in the second sub-portion 5 detects whether the gas concentration exceeds a safety threshold or not, the gas concentration is fed back to the buzzer 6 and the signal lamp 7 according to different safety thresholds, the gas concentration and video information of each position are transmitted to an out-of-tunnel control room in real time, and a controller remotely controls the movement of the self-propelled arch-frame vehicle 20 and the rotation of the steering connecting neck 4 through the video transmission device 1;
E. corresponding remote control and manual processing are carried out in time according to information fed back by the tile detection unit 12, for example, when the tile detection unit 12 gives an early warning, workers in a tunnel are evacuated in time through horn shouting, the air supply quantity of a fan is increased, and the like;
F. and (4) continuously repeating the steps A-E along with the excavation of the tunnel.
Specifically, video transmission device, gas detection appearance can pass to the outer control room of hole with the signal in real time, and the outer personnel of hole of being convenient for in time know the condition in the hole, know the gas situation of change of the interior body position department of hole to carry out remote control to self-propelled bow member car and tile detection unit.
Specifically, the gas detector, the buzzer and the signal lamp are in a linkage state, and the buzzer and the signal lamp can be automatically started when the gas detector detects that gas in the hole reaches a preset safety threshold value; according to the set safety threshold values in different ranges, the buzzer sends out sound frequency from low to high, the sound frequency is more harsh, and the signal lamp is changed from green, yellow to red, so that safety early warning is performed.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
(1) the invention provides an automatic monitoring device for gas monitoring work in a tunnel, in particular to gas monitoring work at a tunnel face, and the introduction of a self-propelled arch frame vehicle, a steering connecting neck and the like saves a large amount of manpower consumption and greatly improves the working efficiency.
(2) The invention is provided with the buzzer and the signal lamp, and is linked with the gas detector, so that the early warning is simple and clear, workers can know the early warning at a glance, the safety production of the tunnel is effectively guaranteed, and the popularization and the promotion are convenient.
(3) The device has low cost, good effect and easy operation. The automation improves the gas detection precision and the construction safety degree, and the safety of workers is guaranteed.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. A tunnel gas concentration remote real-time monitoring and emergency processing device is characterized by comprising a tile detection unit, a self-propelled arch frame vehicle and a steel rail;
the tile detection units are distributed on the self-propelled arch vehicle, and the self-propelled arch vehicle moves along the steel rail; the tile detection unit comprises a body, an air inlet is formed in the body, and a gas detector is arranged in the body and used for detecting the content of gas and transmitting the content of the gas to an out-of-hole control room in real time; a video transmission device, an air gun, a buzzer and a signal lamp are arranged outside the body; the video transmission device can transmit the in-hole pictures to the out-hole control room in real time; the buzzer and the signal lamp can emit sounds with different frequencies and light with different colors to perform gas early warning;
the body comprises a first subsection and a second subsection, the first subsection and the second subsection are connected through a steering connecting neck, the steering connecting neck is connected with the first subsection and the second subsection, automatic steering can be carried out, and air in different directions can be collected;
the air gun is connected with the air pump through an air conveying pipe, and can spray high-pressure air to dilute gas, so that the air gun is used as an emergency treatment means to avoid gas combustion and explosion;
the self-propelled arch truss vehicle is attached to the contour of a tunnel, a lifting hydraulic device is arranged on a chassis, and tile detection units are arranged at an arch crown, an arch shoulder, an arch waist and arch feet;
the self-propelled arch frame vehicle can travel by being matched with the video transmission device through remote control;
the steel rails are longitudinally paved on the tunnel face.
2. The device for remotely monitoring the gas concentration in the tunnel in real time and emergently processing the gas concentration in the tunnel according to claim 1, wherein the first part is provided with the air inlet, and a rotary propeller is arranged in the first part and can be matched with a steering connecting neck to collect air in different directions.
3. The device for remotely monitoring the gas concentration in the tunnel in real time and emergently processing the gas concentration in the tunnel as claimed in claim 1, wherein the gas detector is arranged in the second subsection.
4. The device for remotely monitoring the gas concentration in the tunnel in real time and emergently processing the gas concentration in the tunnel according to claim 1, wherein a protective net is arranged at the air inlet to filter the air.
5. The device for remotely monitoring the gas concentration in the tunnel in real time and emergently processing the gas concentration in the tunnel according to claim 1, wherein the steel rail is connected on site through a connecting bolt and a connecting groove.
6. Use method of the tunnel gas concentration remote real-time monitoring and emergency treatment device according to any one of claims 1 to 5,
A. laying steel rails till the position near the tunnel face;
B. adjusting the self-propelled arch truss vehicle according to the contour and height of the tunnel, and placing the self-propelled arch truss vehicle on a steel rail;
C. installing tile detecting units at the positions of a vault, an arch shoulder, an arch waist and an arch foot on the self-propelled arch frame vehicle;
D. the tile detection unit works, the propeller in the first subsection rotates to absorb air and enters the second subsection through the steering connecting neck, the gas detector in the second subsection detects whether the gas concentration exceeds a safety threshold value or not, the gas concentration and the video information at each position are transmitted to the control room outside the tunnel in real time according to different safety threshold values, and a controller remotely controls the movement of the self-propelled arch-frame vehicle and the rotation of the steering connecting neck through the video transmission device;
E. corresponding remote control and manual processing are carried out in time according to information fed back by the tile detection unit, when the tile detection unit gives an early warning, workers in a tunnel are evacuated in time through horn shouting, and the air output of a fan is increased;
F. and (4) continuously repeating the steps A-E along with the excavation of the tunnel.
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| CN113605978A (en) * | 2021-08-23 | 2021-11-05 | 中煤科工集团重庆研究院有限公司 | Return airway gas emission monitoring method |
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| CN206987880U (en) * | 2017-04-24 | 2018-02-09 | 江苏建筑职业技术学院 | A kind of colliery gas monitor device |
| CN206816304U (en) * | 2017-06-29 | 2017-12-29 | 李贺 | A kind of real-time gas management holder device of coal mining |
| CN207114506U (en) * | 2017-07-06 | 2018-03-16 | 侯宇红 | A kind of gas monitoring device under coal mine |
| CN109488379A (en) * | 2018-11-26 | 2019-03-19 | 彬县水帘洞煤炭有限责任公司 | A kind of mine gas detection system and method |
| CN209327302U (en) * | 2018-11-28 | 2019-08-30 | 赵剑飞 | A kind of coal mine mine air detection device |
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| CN110847964A (en) | 2020-02-28 |
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