Rapid closed type fireproof air bag system for mine laneway and working method of rapid closed type fireproof air bag system

Abstract

The invention discloses a mine laneway rapid closed type fireproof airbag system and a working method, a multi-cavity fireproof airbag is fixed in a laneway through a fixing frame, the multi-cavity fireproof airbag is divided into three independent airbag bodies, namely an inner-layer airbag body, a middle-layer airbag body and an outer-layer airbag body, and the three airbag bodies are sequentially nested; different media are injected when the capsule bodies are unfolded in sequence, and the fire preventing and extinguishing effect on the roadway can be effectively guaranteed through the three-layer nesting and different medium injection mode; the control center is used for receiving data fed back by the data detection device, analyzing and processing the data and then judging whether coal spontaneous combustion or gas explosion risks exist or not, if yes, early warning can be given out to enable personnel in the roadway to evacuate rapidly, and when it is determined that no personnel exist in the roadway through the personnel monitoring device, the multi-cavity fireproof air bags are sequentially unfolded to block the roadway. Gas explosion is prevented as much as possible, the influence range of explosion can be effectively controlled after explosion, and finally the safety of coal mining is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of coal mine safety technology and emergency rescue equipment, and specifically to a mine tunnel rapid closed fireproof airbag system and a working method, which aims to provide an emergency rescue equipment that can quickly and effectively close coal mine tunnels, reduce air inflow, curb the spread of fire, and reduce the risk of explosion, thereby ensuring the life safety of operators. Background Art

[0002] Fires in coal mines pose a major threat, not only destroying valuable equipment and resources, but also directly endangering the lives of workers, and may further trigger gas explosion accidents, exacerbating the disaster. At present, coal mines generally use tunnel sealing technology as a key strategy to curb the spread of fire and suffocate the fire source by isolating oxygen. It plays an important role in fire prevention and control practices. The core of this technology is to isolate the fire area, cut off the oxygen supply path, and force the fire source to weaken or even extinguish due to lack of oxygen. However, while implementing tunnel sealing operations, it is also accompanied by significant risks. That is, the sealing process reduces the airflow, resulting in accelerated accumulation of gas in the closed space and mixing with oxygen in the airflow to form flammable and explosive gases. In addition, the hidden dangers of fire sources have not been eliminated, which significantly increases the risk factor of gas explosion and poses a serious threat to the safety of on-site workers. Traditional closed structures are mostly constructed with materials such as sand, gravel, and concrete. This process not only requires a large amount of material preparation, but also requires manual wall stacking, which is time-consuming and labor-intensive, inefficient, and the on-site workers are dense, which increases the difficulty of management.

[0003] In response to the above problems, although there have been breakthroughs in the polymer quick-setting filling and new inorganic fast-hardening material technologies developed in recent years, they still face limitations such as large workload and long cycle in engineering implementation. In addition, the umbrella-shaped and airbag-type sealing devices that are currently widely used lack the necessary explosion-proof capabilities and are difficult to resist the impact of gas explosions that may occur in confined spaces. Therefore, it is impossible to fully ensure the absolute safety of mines in a closed state. In view of this, exploring more efficient, safe and explosion-proof coal mine tunnel sealing devices and methods has become an important research direction for improving coal mine fire emergency response capabilities and ensuring the safety of operators. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a mine tunnel rapid closed fireproof airbag system and working method, which can quickly judge the risk of coal spontaneous combustion or gas explosion based on monitoring, and take fire prevention and extinguishing measures to prevent gas explosion as much as possible, and can effectively control the impact range of the explosion after the explosion occurs.

[0005] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a mine tunnel rapid closed fireproof airbag system, including a fixed frame, a multi-cavity fireproof airbag, a data detection device, a personnel monitoring device and a control center;

[0006] The fixed frame is installed in the tunnel and is used to place the multi-cavity fireproof airbag. The fixed frame is provided with a mounting hole, and the anchor rod passes through the mounting hole to fix the fixed frame to the tunnel wall.

[0007] The multi-cavity fireproof airbag comprises an outer airbag, an intermediate airbag body and an inner airbag, wherein the outer airbag is installed in a fixed frame, the intermediate airbag body is installed inside the outer airbag and fixedly connected to the inner wall of the outer airbag; the inner airbag is installed inside the intermediate airbag body and fixedly connected to the inner wall of the intermediate airbag body; the gas injection device is used to provide oxygen-free gas to the outer airbag and the inner airbag, and the water injection device is used to inject water into the intermediate airbag body; the outer airbag can seal the tunnel section after being inflated and deployed; the intermediate airbag can increase the overall weight of the multi-cavity fireproof airbag after being injected with water and deployed, thereby improving the impact resistance; the inner airbag can increase the water pressure in the intermediate airbag body after being inflated and deployed to maintain the stability of the entire multi-cavity fireproof airbag after being deployed;

[0008] The data detection device is a sensor network composed of multiple detection units, each detection unit is arranged at different positions in the tunnel and performs gas detection at the position, and then feeds back the detected gas data to the control center;

[0009] The personnel monitoring device is installed in the lane to record the number of people working in the lane and feed it back to the control center;

[0010] The control center is used to receive data feedback from the gas detection device to analyze and determine whether there is a risk of gas explosion, and to issue an early warning through the alarm device installed in the tunnel according to the situation. At the same time, according to the feedback from the personnel monitoring device, after the personnel in the tunnel have completely left, the control center controls the gas injection device and the water injection device to deploy the multi-cavity fireproof airbag to seal the tunnel for fire prevention.

[0011] Furthermore, it also includes an oxygen absorption device, which includes multiple storage containers with electric openings and closings, and multiple storage containers are evenly distributed in the tunnel. Each storage container contains an oxygen absorber. When the control center determines that there is a risk of gas explosion, it can control the opening of each storage container to release the oxygen absorber and absorb the oxygen in the tunnel. By absorbing oxygen in the tunnel, the subsequent combustion of coal spontaneous combustion or gas explosion can be reduced.

[0012] Further, the oxygen absorber is made of 95% ferrous sulfate and 5% silica gel powder in mass percentage. Ferrous sulfate has significant oxygen absorption capacity, can react chemically with oxygen in the air, quickly absorb and consume oxygen. In addition, in order to prevent the ferrous sulfate powder from reacting with moisture in the air and becoming ineffective during long-term storage, 5% silica gel powder is added to the powder for physical drying (chemical desiccant is not applicable to avoid ferrous sulfate reaction and loss of oxygen absorption capacity). Silica gel powder has good hygroscopic properties and can effectively absorb moisture in the container, thereby avoiding ferrous sulfate from reacting with moisture and maintaining its oxygen absorption capacity.

[0013] Furthermore, the personnel monitoring device includes an infrared scanning device, a monitoring and positioning device and a positioning terminal. The monitoring and positioning device is arranged at the entrance and exit of the tunnel, and the positioning terminal is installed on the personnel. When the personnel passes through the monitoring and positioning device, the monitoring and positioning device and the positioning terminal wirelessly communicate to record whether the personnel passes through the entrance or exit of the tunnel; there are two infrared scanning devices, which are respectively installed on both sides of the fixed frame and the two infrared scanning devices are oriented in opposite directions, and are used to determine whether the personnel pass through and walk towards the fixed frame, and together with the monitoring and positioning device, form double insurance monitoring to ensure that the multi-cavity fireproof airbag is deployed after the personnel leave the tunnel.

[0014] Furthermore, the material of the outer airbag is a composite fabric interwoven with aramid fiber and glass fiber, and a layer of P4U smart material cloth with a thickness of 1 to 1.5 mm and a layer of inhibitor (magnesium hydroxide) coating with a thickness of about 0.1 mm are added to its explosion-facing surface; the material of the middle layer of the airbag is polyester fiber or nylon fiber, and the inner wall of the middle layer of the airbag is coated with a polyurethane coating; the material of the inner airbag is aramid fiber.

[0015] Furthermore, the outer airbag, the middle airbag and the inner airbag are all equipped with pressure sensors for monitoring the pressure data inside each airbag.

[0016] Furthermore, the gas injection device is two silicone reinforced fiber hoses with control valves, one end of the two silicone reinforced fiber hoses is connected to the underground high-pressure air pipe, and the other end is connected to the outer airbag and the inner airbag respectively. The water injection device is a steel wire braided high-pressure rubber hose with a control valve, one end of which is connected to the underground high-pressure water pipe and the other end is connected to the middle layer capsule. The control center can control the opening and closing of each control valve separately. The silicone reinforced fiber hose has excellent high temperature resistance and aging resistance, as well as good flexibility and wear resistance. It is suitable for material transmission of food, beverage, medical equipment, and special industrial scenes such as high temperature, strong acid and alkali, and organic solvents. Although it is rarely used underground, it has obvious advantages over the rubber hose, PVC gas extraction pipe, and steel wire braided hose commonly used in mines. Its temperature resistance range is 60℃ to 250℃, it has strong chemical corrosion resistance, good flexibility, high pressure resistance, sanitation and safety, non-toxic and pollution-free, long service life, and can better adapt to the complex and harsh environment underground, reducing costs and risks. The inner diameter of the hose is 25mm to 50mm, and the wall thickness is generally 2mm to 4mm, considering the pressure bearing and wear resistance. The working pressure can reach at least 2MPa; the wire braided high-pressure rubber hose has significant advantages. It has strong pressure resistance and can meet the needs of underground high-pressure water delivery such as deep drainage. Ordinary hoses are far behind; high strength and durability, good resistance to external forces, and long service life; it has both flexibility and good bending resistance, which is convenient for laying pipelines in complex underground spaces, and stable and reliable water delivery. Inner diameter: between 32mm and 65mm. Wall thickness: considering the pressure and wear resistance, the wall thickness is 3mm to 6mm. The working pressure can withstand at least 4MPa.

[0017] Furthermore, the detection unit includes a temperature sensor, a carbon monoxide gas concentration sensor, a methane gas concentration sensor and an ethylene gas concentration sensor, which are used to detect the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at the location and feed back to the control center.

[0018] Furthermore, it also includes an emergency start switch installed at the tunnel exit. When personnel manually control the emergency start switch, the multi-cavity fireproof airbag can be inflated and deployed to block the tunnel. The addition of this device ensures that when the equipment cannot be linked normally, both the staff who are remotely monitoring in the dispatching room and the staff at the mine site can quickly control the device in an emergency.

[0019] The working method of the above-mentioned mine tunnel rapid closed fireproof airbag system comprises the following specific steps:

[0020] A. Laying out the fireproof airbag system: Select an installation position in the tunnel and place the fixed frame at the position, then use anchor rods to fix the fixed frame to the tunnel; install the multi-chamber fireproof airbag on the fixed frame and keep it in an unexpanded state, and connect the air injection device to the inner and outer airbags, and the water injection device to the middle airbag body; then lay out the data detection device and the personnel monitoring device in the tunnel, and finally connect the water injection device, air injection device, data detection device and personnel monitoring device to the control center to complete the deployment of the fireproof airbag system;

[0021] B. Setting thresholds: setting the temperature threshold, carbon monoxide gas concentration threshold, methane gas concentration threshold and ethylene gas concentration threshold in the control center in turn;

[0022] C. Safety monitoring: The data detection device regularly detects the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at different positions in the tunnel and feeds them back to the control center. The control center compares and analyzes each detection data with the set threshold value. The specific judgment is as follows: first compare the temperature data at different positions with the temperature threshold value. If the temperature data does not exceed the temperature threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if the temperature data at a certain position exceeds the temperature threshold value, the carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration corresponding to the position are compared with the corresponding threshold values ​​respectively. If each monitoring value does not exceed the threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if a certain monitoring value exceeds the threshold value, the tunnel is judged to be in an unsafe state, and the control center issues an early warning through the alarm device to prompt the personnel in the tunnel to evacuate quickly and enter step D;

[0023] D. Deployment of multi-cavity fireproof airbags: The control center receives the number of people in the tunnel fed back by the personnel monitoring device in real time. When the number of people in the tunnel is zero, the control center first controls the air injection device to inject air into the outer airbag for a period of time, so that it expands and expands rapidly to block the tunnel section where it is located; after the outer airbag stops injecting air, the water injection device is used to inject water into the middle airbag for a period of time and the water injection pressure is greater than the air injection pressure of the outer airbag, so that it expands and expands to increase the overall weight of the multi-cavity fireproof airbag. At the same time, the expansion of the middle airbag will reduce the space inside the outer airbag, thereby increasing the air pressure inside the outer airbag and improving the blocking effect; after the middle airbag stops injecting water, the air injection device is used to inject air into the inner airbag for a period of time and the air injection pressure is greater than the water injection pressure of the middle airbag. During its expansion and expansion, the water in the middle airbag is pressurized, thereby driving the middle airbag to fully expand and increasing the water pressure in the middle airbag, completing the deployment process of the multi-cavity fireproof airbag;

[0024] E. Fire prevention and extinguishing treatment: When a gas explosion occurs in the tunnel or the hot air flow generated by spontaneous combustion of coal reaches the multi-cavity fireproof airbag, the outer airbag is first deformed by the impact, and the impact force is transmitted to the middle layer of the airbag and the inner layer of the airbag in turn, buffering and blocking the hot air flow, and the water in the middle layer of the airbag can cool the hot air flow, thereby realizing the fire prevention and extinguishing process in the tunnel; if the impact force of the hot air flow is large and causes the outer airbag to rupture, the oxygen-free gas inside it is discharged into the tunnel to continue to suppress the flame, and the middle layer of the airbag and the inner layer of the airbag can continue to partially block the hot air flow, thereby ensuring the fire prevention and extinguishing effect in the tunnel.

[0025] Furthermore, the gas injected by the gas injection device is nitrogen or carbon dioxide.

[0026] Compared with the prior art, the present invention adopts a combination of a fixed frame, a multi-cavity fireproof airbag, a data detection device, a personnel monitoring device and a control center. The multi-cavity fireproof airbag is fixed in the tunnel through a fixed frame. The multi-cavity fireproof airbag is divided into three independent airbags, namely an inner airbag, a middle airbag and an outer airbag, and the three airbags are nested in sequence. When unfolding, air is first injected to unfold the outer airbag to achieve a rapid blocking effect. Subsequently, water and air are injected in sequence to unfold the middle airbag and the inner airbag. During the unfolding process, the middle airbag can increase the air pressure in the outer airbag to further increase its blocking effect. At the same time, when the inner airbag is unfolded, the middle airbag can be fully unfolded, thereby realizing the overall complete unfolding and blocking of the multi-cavity fireproof airbag; after being fully unfolded, the outer airbag is used to directly contact the coal self-closing device. The hot air flow generated by the combustion or gas explosion can transfer the impact force and heat to the middle layer capsule after being compressed and deformed. The water inside the middle layer capsule can cool the heat, and the water has better impact resistance. Finally, the remaining impact force is transferred to the inner layer airbag for buffering. This three-layer nesting and injection of different media can effectively ensure the fire prevention and extinguishing effect of the tunnel. The data detection device is used to monitor the temperature and gas data at different positions in the tunnel, the personnel monitoring device is used to monitor the number of people in the tunnel, and the control center is used to receive the data feedback from the data detection device for analysis and processing to determine whether there is a risk of spontaneous combustion of coal or gas explosion. If there is, it can issue an early warning to enable the personnel in the tunnel to evacuate quickly, and when it is determined that there are no personnel in the tunnel through the personnel monitoring device, the multi-cavity fireproof airbags are deployed in sequence to block the tunnel. The present invention can quickly determine the risk of spontaneous combustion of coal or gas explosion according to monitoring, enable the personnel in the tunnel to evacuate quickly and take fire prevention and extinguishing measures to prevent gas explosion as much as possible, and can effectively control the impact range of the explosion after the explosion occurs, and finally effectively improve the safety of coal mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall flow chart of the present invention;

[0028] Figure 2is a schematic diagram of the multi-cavity fireproof airbag after deployment in the present invention;

[0029] Figure 3 It is a front view of the inner airbag after it is deployed in the present invention;

[0030] Figure 4 yes Figure 3 Right view of;

[0031] Figure 5 This is a front view of the intermediate layer capsule of the present invention after it is unfolded;

[0032] Figure 6 yes Figure 5 Right view of;

[0033] Figure 7 is a front view of the outer airbag of the present invention after it is deployed;

[0034] Figure 8 yes Figure 7 Right view of;

[0035] Fig. 9 It is a three-dimensional schematic diagram of the fixed frame in the present invention.

[0036] In the figure: 1-fixed frame, 2-inner airbag, 3-middle airbag body, 4-outer airbag, 5-infrared scanning device. DETAILED DESCRIPTION

[0037] The present invention will be further described below.

[0038] like Figure 1 As shown, a mine tunnel rapid closed fireproof airbag system includes a fixed frame 1, a multi-cavity fireproof airbag, a data detection device, a personnel monitoring device and a control center;

[0039] like Fig. 9 As shown, the fixed frame 1 is installed in the tunnel and is used to place the multi-cavity fireproof airbag. The fixed frame 1 is provided with a mounting hole, and the anchor rod passes through the mounting hole to fix the fixed frame 1 to the tunnel wall;

[0040] like Figures 2 to 8As shown, the multi-cavity fireproof airbag includes an outer airbag 4, an intermediate airbag body 3 and an inner airbag 2. The outer airbag 4 is installed in a fixed frame 1, and the intermediate airbag body 3 is installed inside the outer airbag 4 and fixedly connected to the inner wall of the outer airbag; the inner airbag 2 is installed inside the intermediate airbag body 3 and fixedly connected to the inner wall of the intermediate airbag body; the gas injection device is used to provide oxygen-free gas for the outer airbag 4 and the inner airbag 2, and the oxygen-free gas is nitrogen or carbon dioxide gas; the water injection device is used to inject water into the intermediate airbag body 3; the outer airbag 4 can seal the cross section of the tunnel after being inflated and expanded; the intermediate airbag 3 is expanded by water injection. After opening, it can increase the overall weight of the multi-cavity fireproof airbag and improve the impact resistance; after the inner airbag 2 is inflated and unfolded, it can increase the water pressure in the middle layer bladder 3 to maintain the stability of the entire multi-cavity fireproof airbag after unfolding; the material of the outer airbag 4 is a composite fabric interwoven with aramid fiber and glass fiber, and a layer of 1-1.5 mm thick P4U smart material cloth layer and a layer of about 0.1 mm thick inhibitor (magnesium hydroxide) coating are added on its explosion-facing surface; the material of the middle layer bladder 3 is polyester fiber or nylon fiber, and the inner wall of the middle layer bladder is coated with a polyurethane coating; the material of the inner airbag 2 is aramid fiber. The outer airbag 4, the middle layer bladder 3 and the inner airbag 2 are all equipped with pressure sensors for monitoring the pressure data inside each bladder. Each airbag must be able to withstand a pressure at least 20 times the normal air pressure in the mine; blasting pressure: the airbag can remain intact when subjected to a blasting pressure exceeding 50% of the design pressure.

[0041] The data detection device is a sensor network composed of multiple detection units, each detection unit is arranged at different positions in the tunnel and performs gas detection at the position, and then feeds back the detected gas data to the control center; the detection unit includes a temperature sensor, a carbon monoxide gas concentration sensor, a methane gas concentration sensor and an ethylene gas concentration sensor, which are used to detect the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at the position and feed back to the control center.

[0042] The personnel monitoring device is installed in the lane, and is used to record the number of people working in the lane and feed it back to the control center; the personnel monitoring device includes an infrared scanning device 5, a monitoring and positioning device and a positioning terminal, the monitoring and positioning device is arranged at the entrance and exit of the lane, and the positioning terminal is installed on the person, when the person passes through the monitoring and positioning device, the monitoring and positioning device and the positioning terminal wireless communication are used to record whether the person passes through the entrance or exit of the lane; there are two infrared scanning devices 5, which are installed on both sides of the fixed frame 1 respectively, and the two infrared scanning devices 5 are in opposite directions, and are used to judge whether the person passes through the fixed frame 1 and the direction of the person, and form a double insurance monitoring with the monitoring and positioning device to ensure that the multi-cavity fireproof airbag is deployed after the person in the lane leaves; the judgment process of the infrared scanning device is as follows: the infrared scanning devices 5 on both sides of the fixed frame 1 continuously detect the human body heat source, when the person passes from one side of the fixed frame 1 to the other side, the infrared scanning devices 5 on both sides of the fixed frame 1 will detect the human body heat source in turn, and the direction of the person passing by is confirmed by the time sequence detected by the infrared scanning devices 5 on both sides, so as to record the number of people passing by and judge the direction of the person.

[0043] The control center is used to receive data feedback from the gas detection device to analyze and determine whether there is a risk of gas explosion, and issue an early warning through the alarm device installed in the tunnel according to the situation. At the same time, according to the feedback from the personnel monitoring device, after the personnel in the tunnel have completely left, the gas injection device and the water injection device are controlled to expand the multi-cavity fireproof airbag to block the tunnel for fire prevention. It also includes an emergency start switch installed at the exit of the tunnel. The personnel manually control the emergency start switch to expand the multi-cavity fireproof airbag to block the tunnel; the addition of this device ensures that when the equipment cannot be linked normally, both the staff who are remotely monitoring in the dispatching room and the staff at the mine site can quickly control the device in an emergency.

[0044] As an improvement of the present invention, an oxygen absorption device is also included, which includes a plurality of storage containers with electric opening and closing ports, and the plurality of storage containers are evenly distributed in the tunnel, and each storage container is filled with an oxygen absorber. When the control center determines that there is a risk of gas explosion, the opening of each storage container can be controlled to release the oxygen absorber and absorb the oxygen in the tunnel. By absorbing oxygen in the tunnel, the subsequent combustion of coal spontaneous combustion or the gas explosion can be reduced. The oxygen absorber is a highly efficient reducing solid powder, which is mixed with 95% ferrous sulfate and 5% silica gel powder according to mass percentage. Ferrous sulfate has a significant oxygen absorption capacity, can react chemically with oxygen in the air, and quickly absorb and consume oxygen. In addition, in order to prevent the ferrous sulfate powder from reacting with moisture in the air and failing during long-term storage, 5% silica gel powder is added to the powder for physical drying (chemical desiccant is not applicable to avoid the reaction of ferrous sulfate to lose oxygen absorption capacity). Silica gel powder has good hygroscopic properties and can effectively absorb moisture in the container, thereby avoiding the reaction of ferrous sulfate with moisture and maintaining its oxygen absorption capacity.

[0045] As another improvement of the present invention, the gas injection device is two silicone reinforced fiber hoses with control valves, one end of the two silicone reinforced fiber hoses is connected to the underground high-pressure air pipe, and the other end is connected to the outer airbag and the inner airbag respectively. The water injection device is a steel wire braided high-pressure rubber hose with a control valve, one end of which is connected to the underground high-pressure water pipe and the other end is connected to the middle layer capsule. The control center can control the opening and closing of each control valve separately. The silicone reinforced fiber hose has excellent high temperature resistance and aging resistance, as well as good flexibility and wear resistance. It is suitable for material transmission of food, beverage, medical equipment, and special industrial scenes such as high temperature, strong acid and alkali, and organic solvents. Although it is rarely used underground, it has obvious advantages over the rubber hose, PVC gas extraction pipe, and steel wire braided hose commonly used in mines. Its temperature resistance range is 60℃ to 250℃, it has strong chemical corrosion resistance, good flexibility, high pressure resistance, sanitation and safety, non-toxic and pollution-free, long service life, can better adapt to the complex and harsh environment underground, and reduce costs and risks. The inner diameter of the hose is 25mm to 50mm, and the wall thickness is generally 2mm to 4mm, considering the pressure bearing and wear resistance. The working pressure can reach at least 2MPa; the wire braided high-pressure rubber hose has significant advantages. It has strong pressure resistance and can meet the needs of underground high-pressure water delivery such as deep drainage. Ordinary hoses are far behind; high strength and durability, good resistance to external forces, and long service life; it has both flexibility and good bending resistance, which is convenient for laying pipelines in complex underground spaces, and stable and reliable water delivery. Inner diameter: between 32mm and 65mm. Wall thickness: considering the pressure and wear resistance, the wall thickness is 3mm to 6mm. The working pressure can withstand at least 4MPa.

[0046] The working method of the above-mentioned mine tunnel rapid closed fireproof airbag system comprises the following specific steps:

[0047] A. Laying out the fireproof airbag system: Select an installation position in the tunnel and place the fixed frame 1 there, then use anchor rods to fix the fixed frame 1 to the tunnel; install the multi-chamber fireproof airbag on the fixed frame 1 and keep it in an unexpanded state, and connect the air injection device to the inner airbag 2 and the outer airbag 4, and the water injection device to the middle airbag 3; then lay out the data detection device and the personnel monitoring device in the tunnel, and finally connect the water injection device, the air injection device, the data detection device and the personnel monitoring device to the control center to complete the deployment of the fireproof airbag system;

[0048] B. Setting thresholds: Set the temperature threshold, carbon monoxide gas concentration threshold, methane gas concentration threshold and ethylene gas concentration threshold in the control center in turn; in this embodiment, the specific setting process is: the temperature threshold is set to the second-level warning mode, the first-level warning threshold: 50°C; when the coal temperature exceeds 50°C, the control center reminds the staff to pay attention to the abnormal underground temperature through the alarm device, and pay close attention to the temperature change trend. Second-level warning threshold: 90°C; when the coal temperature further rises to 90°C, it means that the coal has an obvious tendency to spontaneously combust, and the staff needs to immediately pay attention to the concentration changes of harmful gases such as methane, carbon monoxide and ethylene.

[0049] Methane gas concentration threshold: 10000ppm; according to coal mine gas prevention and control experience and relevant standards, when the methane concentration reaches 1% (10000ppm), it is necessary to strengthen monitoring.

[0050] The threshold range of carbon monoxide gas concentration is from 50 to 1498 ppm. The concentration variation of carbon monoxide produced by different types of coal during spontaneous combustion is similar, but the specific values ​​will be different. Select within this range according to the actual situation.

[0051] Ethylene gas concentration threshold range: 0.5 to 2.5 ppm; the amount of ethylene produced during coal spontaneous combustion is relatively small compared to carbon monoxide, but it plays an important role in judging the severity of coal spontaneous combustion. The value varies for different types of coal, so it is selected within the above range based on actual conditions.

[0052] C. Safety monitoring: The data detection device regularly detects the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at different positions in the tunnel and feeds them back to the control center. The control center compares and analyzes each detection data with the set threshold value. The specific judgment is as follows: first compare the temperature data at different positions with the temperature threshold value. If the temperature data does not exceed the temperature threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if the temperature data at a certain position exceeds the temperature threshold value, the carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration corresponding to the position are compared with the corresponding threshold values ​​respectively. If each monitoring value does not exceed the threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if a certain monitoring value exceeds the threshold value, the tunnel is judged to be in an unsafe state, and the control center issues an early warning through the alarm device to prompt the personnel in the tunnel to evacuate quickly and enter step D;

[0053] D. Deployment of multi-cavity fireproof airbags: The control center receives the number of people in the tunnel fed back by the personnel monitoring device in real time. When the number of people in the tunnel is zero, the control center first controls the air injection device to inject air into the outer airbag 4 for a period of time, so that it expands and expands rapidly to block the tunnel section where it is located; after the outer airbag 4 stops injecting air, the middle layer capsule 3 is injected with water for a period of time through the water injection device, and its water injection pressure is greater than the injection pressure of the outer airbag, so that it expands and expands to increase the overall weight of the multi-cavity fireproof airbag. At the same time, the expansion of the middle layer capsule 3 will reduce the space inside the outer airbag 4, thereby increasing the air pressure inside the outer airbag 4 and improving the blocking effect; after the middle layer capsule 3 stops injecting water, the inner layer airbag 2 is injected with air for a period of time through the air injection device, and its air injection pressure is greater than the water injection pressure of the middle layer capsule 3. During its expansion and expansion, it pressurizes the water in the middle layer capsule 3, thereby driving the middle layer capsule 3 to fully expand, and increasing the water pressure in the middle layer capsule 3, completing the deployment process of the multi-cavity fireproof airbag;

[0054] E. Fire prevention and extinguishing treatment: When a gas explosion or coal spontaneous combustion generates a hot air flow that reaches the multi-cavity fireproof airbag, the outer airbag 4 is first deformed by the impact, and the impact force is transmitted to the middle layer capsule 3 and the inner layer airbag 2 in turn, buffering and blocking the hot air flow, and the water in the middle layer capsule 3 can cool the hot air flow, thereby realizing the fire prevention and extinguishing process in the tunnel; if the impact force of the hot air flow is large and the outer layer airbag 4 ruptures, the oxygen-free gas inside it is discharged into the tunnel to continue to suppress the flame, and the middle layer capsule 3 and the inner layer airbag 2 can continue to partially block the hot air flow, thereby ensuring the fire prevention and extinguishing effect in the tunnel.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A mine tunnel rapid closed fireproof airbag system, characterized in that: It includes a fixed frame, a multi-cavity fireproof airbag, a data detection device, a personnel monitoring device and a control center; The fixed frame is installed in the tunnel and is used to place the multi-cavity fireproof airbag. The fixed frame is provided with a mounting hole, and the anchor rod passes through the mounting hole to fix the fixed frame to the tunnel wall. The multi-cavity fireproof airbag comprises an outer airbag, an intermediate airbag body and an inner airbag, wherein the outer airbag is installed in a fixed frame, the intermediate airbag body is installed inside the outer airbag and fixedly connected to the inner wall of the outer airbag; the inner airbag is installed inside the intermediate airbag body and fixedly connected to the inner wall of the intermediate airbag body; the gas injection device is used to provide oxygen-free gas to the outer airbag and the inner airbag, and the water injection device is used to inject water into the intermediate airbag body; the outer airbag can seal the tunnel section after being inflated and deployed; the intermediate airbag can increase the overall weight of the multi-cavity fireproof airbag after being injected with water and deployed, thereby improving the impact resistance; the inner airbag can increase the water pressure in the intermediate airbag body after being inflated and deployed to maintain the stability of the entire multi-cavity fireproof airbag after being deployed; The data detection device is a sensor network composed of multiple detection units, each detection unit is arranged at different positions in the tunnel and performs gas detection at the position, and then feeds back the detected gas data to the control center; The personnel monitoring device is installed in the lane to record the number of people working in the lane and feed it back to the control center; The control center is used to receive data feedback from the gas detection device to analyze and determine whether there is a risk of gas explosion, and to issue an early warning through the alarm device installed in the tunnel according to the situation. At the same time, according to the feedback from the personnel monitoring device, after the personnel in the tunnel have completely left, the control center controls the gas injection device and the water injection device to deploy the multi-cavity fireproof airbag to seal the tunnel for fire prevention.

2. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: It also includes an oxygen absorption device, which includes multiple storage containers with electric openings and closing ports. The multiple storage containers are evenly distributed in the tunnel, and each storage container contains oxygen absorbent. When the control center determines that there is a risk of gas explosion, it can control the opening of each storage container to release the oxygen absorbent and absorb the oxygen in the tunnel.

3. The mine tunnel rapid closed fireproof airbag system according to claim 2 is characterized in that: The oxygen absorber is prepared by mixing 95% of ferrous sulfate and 5% of silica gel powder according to mass percentage.

4. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: The personnel monitoring device includes an infrared scanning device, a monitoring and positioning device and a positioning terminal. The monitoring and positioning device is arranged at the entrance and exit of the tunnel, and the positioning terminal is installed on the personnel. When the personnel passes through the monitoring and positioning device, the monitoring and positioning device and the positioning terminal wirelessly communicate to record whether the personnel passes through the entrance or exit of the tunnel; there are two infrared scanning devices, which are respectively installed on both sides of the fixed frame, and are used to judge whether the personnel pass through and walk towards the fixed frame.

5. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: The material of the outer airbag is a composite fabric interwoven with aramid fiber and glass fiber, and a layer of P4U smart material cloth and a layer of inhibitor coating are added to its explosion-facing surface; the material of the middle layer bladder body is polyester fiber or nylon fiber, and the inner wall of the middle layer bladder body is coated with a polyurethane coating; the material of the inner airbag is aramid fiber; the outer airbag, the middle layer bladder body and the inner airbag are all equipped with pressure sensors for monitoring the pressure data inside each bladder body.

6. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: The gas injection device is two silicone reinforced fiber hoses with control valves, one end of the two silicone reinforced fiber hoses are connected to the underground high-pressure air pipe, and the other end is connected to the outer air bag and the inner air bag respectively. The water injection device is a steel wire braided high-pressure rubber hose with a control valve, one end of which is connected to the underground high-pressure water pipe and the other end is connected to the middle layer capsule. The control center can individually control the opening and closing of each control valve.

7. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: The detection unit includes a temperature sensor, a carbon monoxide gas concentration sensor, a methane gas concentration sensor and an ethylene gas concentration sensor, which are used to detect the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at the location and feed back to the control center.

8. The mine tunnel rapid closed fireproof airbag system according to claim 1 is characterized in that: It also includes an emergency start switch installed at the tunnel exit. Personnel can manually control the emergency start switch to inflate the multi-cavity fireproof airbag to seal the tunnel.

9. A method for operating the mine tunnel rapid closed fireproof airbag system according to any one of claims 1 to 8, characterized in that: The specific steps are: A. Laying out the fireproof airbag system: Select an installation position in the tunnel and place the fixed frame at the position, then use anchor rods to fix the fixed frame to the tunnel; install the multi-chamber fireproof airbag on the fixed frame and keep it in an unexpanded state, and connect the air injection device to the inner and outer airbags, and the water injection device to the middle airbag body; then lay out the data detection device and the personnel monitoring device in the tunnel, and finally connect the water injection device, air injection device, data detection device and personnel monitoring device to the control center to complete the deployment of the fireproof airbag system; B. Setting thresholds: setting the temperature threshold, carbon monoxide gas concentration threshold, methane gas concentration threshold and ethylene gas concentration threshold in the control center in turn; C. Safety monitoring: The data detection device regularly detects the temperature, carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration at different positions in the tunnel and feeds them back to the control center. The control center compares and analyzes each detection data with the set threshold value. The specific judgment is as follows: first compare the temperature data at different positions with the temperature threshold value. If the temperature data does not exceed the temperature threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if the temperature data at a certain position exceeds the temperature threshold value, the carbon monoxide gas concentration, methane gas concentration and ethylene gas concentration corresponding to the position are compared with the corresponding threshold values ​​respectively. If each monitoring value does not exceed the threshold value, the tunnel is judged to be in a safe state and wait for the next detection data; if a certain monitoring value exceeds the threshold value, the tunnel is judged to be in an unsafe state, and the control center issues an early warning through the alarm device to prompt the personnel in the tunnel to evacuate quickly and enter step D; D. Deployment of multi-cavity fireproof airbags: The control center receives the number of people in the tunnel fed back by the personnel monitoring device in real time. When the number of people in the tunnel is zero, the control center first controls the air injection device to inject air into the outer airbag for a period of time, so that it expands and expands rapidly to block the tunnel section where it is located; after the outer airbag stops injecting air, the water injection device is used to inject water into the middle airbag for a period of time and the water injection pressure is greater than the air injection pressure of the outer airbag, so that it expands and expands to increase the overall weight of the multi-cavity fireproof airbag. At the same time, the expansion of the middle airbag will reduce the space inside the outer airbag, thereby increasing the air pressure inside the outer airbag and improving the blocking effect; after the middle airbag stops injecting water, the air injection device is used to inject air into the inner airbag for a period of time and the air injection pressure is greater than the water injection pressure of the middle airbag. During its expansion and expansion, the water in the middle airbag is pressurized, thereby driving the middle airbag to fully expand and increasing the water pressure in the middle airbag, completing the deployment process of the multi-cavity fireproof airbag; E. Fire prevention and extinguishing treatment: When a gas explosion occurs in the tunnel or the hot air flow generated by spontaneous combustion of coal reaches the multi-cavity fireproof airbag, the outer airbag is first deformed by the impact, and the impact force is transmitted to the middle layer of the airbag and the inner layer of the airbag in turn, buffering and blocking the hot air flow, and the water in the middle layer of the airbag can cool the hot air flow, thereby realizing the fire prevention and extinguishing process in the tunnel; if the impact force of the hot air flow is large and causes the outer airbag to rupture, the oxygen-free gas inside it is discharged into the tunnel to continue to suppress the flame, and the middle layer of the airbag and the inner layer of the airbag can continue to partially block the hot air flow, thereby ensuring the fire prevention and extinguishing effect in the tunnel.

10. The working method according to claim 9, characterized in that: The gas injected by the gas injection device is nitrogen or carbon dioxide.

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