Civil air defense, poison filtration and ventilation system built by utilizing coal mine wide roadway

Abstract

The invention relates to the technical field of civil air defense engineering, and discloses a civil air defense poison filtering ventilation system built through a coal mine wide roadway, the civil air defense poison filtering ventilation system comprises one or more civil air defense poison filtering ventilation system single bodies connected in series, and each civil air defense poison filtering ventilation system single body comprises two cement bases fixed to the surface of the inner wall of the roadway in a sealed mode; an installation bent frame is fixed between the two cement bases, two sets of parallel poison filtering and ventilating devices are fixed to the installation bent frame in a sealed mode, the air inlet end and the air outlet end of each poison filtering and ventilating device are provided with channels in the same direction as a roadway, and the channels comprise the central channel and the side channels. A vertical sealing baffle is fixed to the side face, located on the poison filtering and ventilating device, of the installation bent frame through the installation bent frame, a protective air-tight door and an oil screen dust filter are embedded in the vertical sealing baffle in a sealed mode and right opposite to the channel inlet, and a protective air-tight door is embedded in the sealing baffle in a sealed mode and right opposite to the channel outlet. The system is high in protection level and long in protection time, and does not need to occupy extra space.

Description

Technical Field

[0001] The present invention relates to the technical field of civil air defense engineering, and in particular to a civil air defense gas filtering and ventilation system, and specifically to a civil air defense gas filtering and ventilation system constructed by utilizing wide tunnels in a coal mine. Background Art

[0002] Civil air defense projects refer to underground protective buildings built to ensure the shelter of personnel and materials, civil air defense command, and medical rescue during wartime, as well as basements built in combination with ground buildings that can be used for air defense during wartime. Civil air defense projects are covered with a thick protective layer that can resist the fragments of bombs and missile explosions, isolate nuclear radiation, biological and chemical weapons, explosion shock waves, etc. There is a special ventilation system inside to prevent toxic and harmful gases from entering the project. Modern civil air defense projects are often built in conjunction with underground commercial spaces, such as subways, underground shopping malls, underground passages, etc. This type of civil air defense project combined with underground space generally has the following shortcomings: 1. The resistance level is relatively low, generally second-class personnel shelters and material warehouses; 2. The protection time is short. After failure, professionals need to replace the spare purification device in time. If there is no professional operation or the replacement is not timely, the project will face the risk of contamination; 3. The air volume is small and cannot meet the ventilation demand of more than 100,000 cubic meters per hour; 4. It is necessary to reserve a special installation place, such as a gas filter room and a dust filter room, and the space utilization rate is low; 5. Peacetime ventilation and wartime ventilation, wartime clean ventilation and wartime gas filtering ventilation; 6. During wartime, both clean ventilation and gas filtering ventilation require switching pipelines. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a method of building a human air defense and gas filtering ventilation system by utilizing wide tunnels in coal mines.

[0004] The present invention is implemented by the following technical solutions: A human air defense and gas filtering ventilation system is constructed by utilizing wide coal mine tunnels, comprising one or more human air defense and gas filtering ventilation system units connected in series, wherein the human air defense and gas filtering ventilation system units comprise two cement bases which are sealed and fixed on the inner wall surface of the tunnel, a mounting rack is fixed between the two cement bases, two sets of parallel gas filtering and ventilation devices are sealed and fixed on the mounting racks, an air inlet end and an air outlet end of each gas filtering and ventilation device are provided with a channel which is in the same direction as the tunnel, and the channel comprises a central channel and a side channel, a vertical sealing baffle is fixed on the side of the gas filtering and ventilation device on the mounting rack through the mounting rack, a protective airtight door and an oil net dust filter are sealed and embedded on the vertical sealing baffle opposite to the entrance of the channel, and a protective airtight door is sealed and embedded on the sealing baffle opposite to the exit of the channel.

[0005] During implementation, it includes a human air defense gas filtering and ventilation system unit, which includes two cement bases sealed and fixed on the inner wall surface of the tunnel. The cement bases are piled on the inner wall surface of the tunnel as the installation base for construction. An installation rack is fixed between the two cement bases. The installation rack is arranged along the direction of the tunnel and is used for the installation and fixation of the gas filtering and ventilation device. The cement base and the rack are the installation and fixation bases of the human air defense gas filtering and ventilation system, which avoids directly drilling, drilling, hoisting and other operations on the inner wall of the coal mine tunnel to damage the geological structure of the tunnel and increase the risk of landslides. Two sets of parallel gas filtering and ventilation devices are sealed and fixed on the installation rack. Specifically, the gap between the gas filtering and ventilation device and the installation rack is filled with a sealing baffle. The gap between the pipes and cables between the gas filtering and ventilation device and the installation rack is filled by the sealing baffle located at the upper part of the tunnel. The air inlet and outlet ends of the wind device are provided with channels in the same direction as the lane, and the channels include a central channel and a side channel. A vertical sealing baffle is fixed on the side of the gas filtering ventilation device on the mounting rack through the mounting rack, and a protective airtight door and an oil mesh dust filter are sealed and embedded on the vertical sealing baffle opposite the channel entrance. Both the protective airtight door and the oil mesh dust filter adopt existing technologies, wherein the oil mesh dust filter adopts a door structure, which switches the ventilation mode by closing and opening, filters large particles of dust and impurities when closed, and directly passes through when opened, and a protective airtight door is sealed and embedded on the sealing baffle opposite the channel outlet; an internal circulation purification device is provided in the external space located at the channel outlet end in the lane, which adopts existing technologies to circulate and purify the air passing through the human air defense gas filtering ventilation system monomer, and is used to purify a small amount of low-concentration pollutants leaked when the purification system switches modes.

[0006] Furthermore, the gas filtering and ventilation device includes several groups of parallel gas filtering and ventilation units, and the number of gas filtering and ventilation units in the group of gas filtering and ventilation devices is the same. The air inlet end of the gas filtering and ventilation unit is provided with a closed valve, and the air outlet end is provided with an explosion-proof fan. The device provides air flow circulation power to avoid increasing the burden on the total ventilation system of the coal mine during gas filtering and ventilation, and to avoid affecting the balance of ventilation volume in each lane of the coal mine due to the increase in ventilation resistance of the lane where the artificial air defense gas filtering and ventilation system is installed; a purification module is connected between the closed valve and the explosion-proof fan; that is, the air inlet and outlet ends of the gas filtering and ventilation unit are connected to adjacent channels.

[0007] As a method, the air inlet end of the gas filtering ventilation device faces the central channel, and the air outlet end of the gas filtering ventilation device faces the side channel; both ends of the side channel are sealed by protective sealed doors, the inlet end of the central channel is sealed with an oil mesh dust filter, and the outlet end is sealed by a protective sealed door.

[0008] During natural ventilation, the oil net dust filter and protective sealed doors are all opened for personnel entry and exit and ventilation. Personnel and ventilation are carried out in the side channels and central channels without protection, that is, the sealed valves of the gas filter and ventilation device are closed and there is no air convection.

[0009] A clean ventilation mode is adopted, that is, the protective airtight doors at both ends of the side channels are closed, the oil mesh dust filter at the entrance of the central channel is closed for filtering, and the protective airtight door at the exit is opened. The oil mesh dust filter plays a filtering role for clean ventilation. After the air enters the alley, it is filtered for large particles of dust and impurities by the oil inlet dust filter, then enters the central channel and is sent out from the exit through the protective airtight door.

[0010] A gas filtering protection mode is adopted, that is, the protective airtight door at the entrance of the side channel is closed, the oil mesh dust filter at the entrance of the central channel is closed for filtering, the protective airtight door at the exit of the central channel is closed, and the protective airtight door at the exit of the side channel is opened. The oil mesh dust filter first plays a filtering role to filter large particles of dust and impurities, and the air containing pollutants enters the central channel, is purified by the gas filtering ventilation device, and enters the side channel. The clean air is sent out from the exit of the side channel through the protective airtight door.

[0011] As another way, the air inlet end of the gas filtering ventilation device faces the side channel, and the air outlet end of the gas filtering ventilation device faces the central channel; both ends of the central channel are sealed by protective sealed doors, the inlet end of the side channel is sealed with an oil mesh dust filter, and the outlet end is sealed by a protective sealed door.

[0012] During natural ventilation, the oil net dust filter and protective sealed doors are all opened for personnel entry and exit and ventilation. Personnel and ventilation are carried out in the side channels and central channels without protection, that is, the sealed valves of the gas filter and ventilation device are closed and there is no air convection.

[0013] A clean ventilation mode is adopted, that is, the protective airtight doors at both ends of the central channel are closed, the oil mesh dust filter at the entrance of the side channel is closed for filtering, and the protective airtight door at the exit is opened. The oil mesh dust filter plays a filtering role for clean ventilation. After the air enters the alley, it is filtered for large particles of dust and impurities by the oil inlet dust filter, and then enters the central channel and is sent out from the exit through the protective airtight door.

[0014] A gas filtering protection mode is adopted, that is, the protective airtight door at the entrance of the central channel is closed, the oil mesh dust filter at the entrance of the side channel is closed for filtering, the protective airtight door at the exit of the side channel is closed, and the protective airtight door at the exit of the central channel is opened. The oil mesh dust filter first plays a filtering role to filter large particles of dust and impurities, and the air containing pollutants enters the central channel, is purified by the gas filtering ventilation device, and enters the side channel. The clean air is sent out from the exit of the side channel through the protective airtight door.

[0015] As another way, during implementation, it includes multiple series-connected human air-defense gas-filtering ventilation system units, which are consistent with those when used alone, and the air inlet and air outlet ends of the gas-filtering ventilation devices of two adjacent human air-defense gas-filtering ventilation system units are installed in opposite directions to improve gas filtering efficiency, and a gap is left between the two human air-defense gas-filtering ventilation system units.

[0016] Furthermore, the air inlet of the gas-filtering ventilation device in the air-filtering ventilation system unit located at the front end of the lane faces the central channel, and the air outlet faces the side channel; the air inlet of the gas-filtering ventilation device in the air-filtering ventilation system unit located at the rear end of the lane faces the side channel, and the air outlet faces the central channel. The reverse is also possible.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a gas-filtering ventilation system for civil defense built using wide coal mine tunnels, which utilizes the geological characteristics of coal mines to improve the resistance level and is capable of withstanding stronger impact forces. Multiple systems are used in conjunction, and can quickly switch to the backup system function when one of the systems fails, thereby extending the protection time; achieving gas-filtering ventilation with an hourly ventilation volume of more than 100,000 cubic meters, thereby improving space utilization.

[0018] By installing gas filtering and ventilation devices in parallel, more gas filtering and ventilation devices can be installed in the same installation space, increasing the air volume of gas filtering and ventilation and improving space utilization. The air volume of gas filtering and ventilation depends on the air volume of the gas filtering and ventilation devices. The more gas filtering and ventilation devices there are, the greater the amount of polluted air that can be processed.

[0019] This system is installed in existing coal mine tunnels. It is installed in peacetime and does not take up extra space. It does not affect the passage of personnel and ventilation in peacetime. The same set of ventilation pipelines is used in peacetime and wartime. The ventilation mode is switched in time of war, which can achieve rapid conversion between peacetime and wartime. The existing ventilation system of the coal mine is used for ventilation without increasing the burden on the total ventilation system of the coal mine. People in the coal mine can take shelter on the spot and do not need to be transferred to a designated space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram showing the structure of this system.

[0021] Figure 2 It shows the schematic diagram of the export direction structure of this system.

[0022] Figure 3 It shows the structural diagram of the import direction of this system.

[0023] Figure 4 A schematic diagram showing the structure of a single gas filtration and ventilation unit.

[0024] Figure 5 A diagram showing the usage status of a single system natural ventilation in Example 1.

[0025] Figure 6 A diagram showing the usage status of the single system clean ventilation mode in Example 1.

[0026] Figure 7A diagram showing the usage status of the single system gas filtering and ventilation mode in Example 1.

[0027] Figure 8 A schematic diagram showing the structure of the entrance end of a single system lane in Example 2.

[0028] Fig. 9 A diagram showing the usage status of a single system for natural ventilation in Example 2.

[0029] Fig.10 A diagram showing the usage status of the single system clean ventilation mode in Example 2.

[0030] Fig.11 A diagram showing the usage status of the single system gas filtering and ventilation mode in Example 2.

[0031] Fig.12 A diagram showing the usage status of the dual system clean ventilation mode in Example 3.

[0032] Fig.13 A diagram showing the usage status of the dual system in the pre-filter ventilation and post-clean ventilation mode in Example 3.

[0033] Fig.14 A diagram showing the usage status of the dual-system gas filtering and ventilation mode in Example 3.

[0034] In the figure: 1-tunnel, 2-cement base, 3-protective airtight door, 4-sealing baffle, 5-installation rack, 6-gas filtering and ventilation device, 7-internal circulation purification device, 8-oil net dust filter, 9-sealed valve, 10-purification module, 11-explosion-proof fan. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention are described below in conjunction with the accompanying drawings. Example 1

[0036] A method of using wide tunnels in coal mines to build a human air-defense and gas-filtering ventilation system, such as Figures 1 to 7As shown: it includes a human air-defense gas filtering and ventilation system monomer, which includes two cement bases 2 sealed and fixed on the inner wall surface of the tunnel 1 as a construction installation base, and a mounting rack 5 is fixed between the two cement bases 2. The mounting rack 5 is arranged along the direction of the tunnel 1 and is used for the installation and fixation of the gas filtering and ventilation device 6 to avoid drilling holes in the tunnel and changing the tunnel structure; two groups of parallel gas filtering and ventilation devices 6 are sealed and fixed on the mounting rack 5, specifically, the gap between the gas filtering and ventilation device 6 and the mounting rack 5 is filled with a sealing baffle 4, and the gap between the gas filtering and ventilation device 6 and the mounting rack 5 is filled by the sealing baffle 4 located on the upper part of the tunnel 1, and pipes and cables pass through the gap, and the air inlet and outlet ends of each gas filtering and ventilation device 6 are left with a channel with the same direction as the tunnel 1, and the channel includes a middle The central channel and the side channel are provided with a vertical sealing baffle 4 fixed on the side of the gas filtering and ventilation device 6 on the mounting rack 5. A protective airtight door 3 and an oil mesh dust filter 8 are sealed and embedded on the vertical sealing baffle 4 opposite to the channel entrance. The protective airtight door 3 and the oil mesh dust filter 8 are both made by existing technologies, wherein the oil mesh dust filter 8 adopts a door structure, which switches the ventilation mode by closing and opening. When closed, large particles of dust and impurities are filtered, and when opened, air passes directly through. A protective airtight door 3 is sealed and embedded on the sealing baffle 4 opposite to the channel outlet; an internal circulation purification device 7 is provided in the external space at the channel outlet end in the lane 1. The existing technology is adopted to circulate and purify the air passing through the human air defense gas filtering and ventilation system monomer, and is used to purify a small amount of low-concentration pollutants leaked when the purification system switches modes.

[0037] Preferably, the gas filtering and ventilation device 6 includes 6 groups of parallel gas filtering and ventilation units, each of which is provided with a closed valve 9 at the air inlet end and an explosion-proof fan 11 at the air outlet end; a purification module 10 is connected between the closed valve 9 and the explosion-proof fan 11; that is, the air inlet and air outlet ends of the gas filtering and ventilation units are connected to adjacent channels; in this embodiment, the air inlet end of the gas filtering and ventilation device 6 faces the central channel, that is, the air inlet end of the gas filtering and ventilation unit faces the central channel, and the air outlet end of the gas filtering and ventilation device 6 faces the side channel, that is, the air outlet end of the gas filtering and ventilation unit faces the side channel; both ends of the side channel are sealed by a protective closed door 3, the inlet end of the central channel is sealed with an oil mesh dust filter 8, and the outlet end is sealed by a protective closed door 3.

[0038] like Figure 5 As shown: during natural ventilation, the oil net dust filter 8 and the protective airtight door 3 are all opened for personnel entry and exit and ventilation. Personnel and ventilation are carried out in the side channels and the central channel without protection, that is, the airtight valve of the gas filter ventilation device is closed and there is no air convection.

[0039] like Figure 6As shown: a clean ventilation mode is adopted, that is, the protective closed doors 3 located at both ends of the side channels are closed, the oil mesh dust filter 8 located at the entrance end of the central channel is closed for filtering, and the protective closed door 3 at the exit end is opened, and the oil mesh dust filter 8 plays a filtering role for clean ventilation. After the air enters the lane 1, it is filtered for large particles of dust and impurities by the oil inlet dust filter 8, and then enters the central channel and is sent out from the exit end through the protective closed door 3.

[0040] like Figure 7 As shown: a gas filtering protection mode is adopted, that is, the protective airtight door 3 at the inlet end of the side channel is closed, the oil mesh dust filter 8 at the inlet end of the central channel is closed for filtering, the protective airtight door 3 at the outlet end of the central channel is closed, and the protective airtight door 3 at the outlet end of the side channel is opened. The oil mesh dust filter 8 first plays a filtering role to filter large particles of dust and impurities, and the air containing pollutants enters the central channel, is purified by the gas filtering ventilation device 6, and enters the side channel. The clean air is sent out from the outlet end of the side channel through the protective airtight door 3. Example 2

[0041] A method of using wide tunnels in coal mines to build a human air-defense and gas-filtering ventilation system, such as Figures 8 to 11 As shown: except for the installation direction of the air inlet and air outlet of the gas filtering and ventilation device 6, the rest is the same as Example 1, the air inlet of the gas filtering and ventilation device 6 faces the side channel, and the air outlet of the gas filtering and ventilation device 6 faces the central channel; the two ends of the central channel are sealed by a protective closed door 3, the inlet end of the side channel is sealed with an oil mesh dust filter 8, and the outlet end is sealed by a protective closed door 3.

[0042] like Fig. 9 As shown: during natural ventilation, the oil net dust filter 8 and the protective airtight door 3 are all opened for personnel entry and exit and ventilation. Personnel and ventilation are carried out in the side channels and the central channel without protection, that is, the airtight valve of the gas filter ventilation device is closed and there is no air convection.

[0043] like Fig.10 As shown: a clean ventilation mode is adopted, that is, the protective closed doors 3 located at both ends of the central channel are closed, the oil mesh dust filter 8 located at the inlet end of the side channel is closed for filtering, and the protective closed door 3 at the outlet end is opened, and the oil mesh dust filter 8 plays a filtering role for clean ventilation. After the air enters the lane 1, it is filtered for large particles of dust and impurities by the oil inlet dust filter 8, and then enters the central channel and is sent out from the outlet end through the protective closed door 3.

[0044] like Fig.11As shown: a gas filtering protection mode is adopted, that is, the protective airtight door 3 at the entrance of the central channel is closed, the oil mesh dust filter 8 at the entrance of the side channel is closed for filtering, the protective airtight door 3 at the exit of the side channel is closed, and the protective airtight door 3 at the exit of the central channel is opened. The oil mesh dust filter 8 first plays a filtering role to filter large particles of dust and impurities, and the air containing pollutants enters the central channel, is purified by the gas filtering ventilation device 6, and enters the side channel. The clean air is sent out from the exit of the side channel through the protective airtight door 3. Example 3

[0045] A method of using wide coal mine tunnels to build a human air defense and gas filtering ventilation system, using a combination of two-side air intake and middle air outlet and middle air intake and two-side air outlet, such as Figures 12-14 As shown: it includes two series-connected human air defense gas filtering ventilation system monomers, which can meet the long-term sheltering needs of personnel. The installation directions of the gas filtering ventilation devices 6 of the human air defense gas filtering ventilation system monomers are opposite, and there is a gap between the two human air defense gas filtering ventilation system monomers. Furthermore, the air inlet end of the gas filtering ventilation device 6 in the human air defense gas filtering ventilation system monomer located at the front end of the lane 1 faces the central channel, and the air outlet end faces the side channel; the air inlet end of the gas filtering ventilation device 6 in the human air defense gas filtering ventilation system monomer located at the rear end of the lane 1 faces the side channel, and the air outlet end of the gas filtering ventilation device 6 faces the central channel.

[0046] like Fig.12 As shown: the dual systems adopt a clean ventilation mode. The human air defense and gas filtering ventilation system unit located at the front end of the alley 1 cleans and ventilates the air from the central channel, and the human air defense and gas filtering ventilation system unit located at the rear end of the alley cleans and ventilates the air from the side channel, that is, the two layers of oil mesh dust filters 8 filter in turn to improve the effect of clean filtration.

[0047] like Fig.13 As shown: When the dual system is in the pre-gas filtering ventilation and post-cleaning ventilation mode, the air-defense gas filtering ventilation system monomer located at the front end of lane 1 is first converted to the gas filtering ventilation mode, and the air-defense gas filtering ventilation system monomer located at the rear end of lane 1 is still in the clean ventilation mode. That is, gas filtering ventilation is performed first, and filtering is performed later.

[0048] like Fig.14 As shown: When the dual-system gas filtering and ventilation mode is in progress, when the gas filtering and ventilation device 6 in the front-end human air defense gas filtering and ventilation system unit fails, the human air defense gas filtering and ventilation system unit at the rear end of the alley 1 is enabled to switch to the gas filtering and ventilation mode, which can effectively extend the protective gas filtering time. Example 4

[0049] A human air defense and gas filtering ventilation system is constructed using a wide coal mine tunnel. The system is suitable for tunnels that are relatively wide and have fewer pipes or lines on both sides. The system comprises more than two human air defense and gas filtering ventilation system monomers, which are connected in series. The installation directions of the gas filtering and ventilation devices 6 of two adjacent human air defense and gas filtering ventilation system monomers are opposite. That is, a human air defense and gas filtering ventilation system is constructed using one of Embodiments 1 and 2 using a wide coal mine tunnel, which are arranged alternately in series. When a certain human air defense and gas filtering ventilation system monomer fails, other human air defense and gas filtering ventilation system monomers can also be used to achieve gas filtering and ventilation, thereby effectively extending the protection time.

[0050] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of using wide tunnels in coal mines to build a human air defense and gas filtering ventilation system, characterized in that: The invention comprises one or more series-connected human air-defense gas-filtering ventilation system monomers, wherein the human air-defense gas-filtering ventilation system monomers comprise two cement bases (2) sealed and fixed on the inner wall surface of a tunnel (1), a mounting rack (5) being fixed between the two cement bases (2), two sets of parallel gas-filtering ventilation devices (6) being sealed and fixed on the mounting rack (5), a channel having the same direction as the tunnel (1) being reserved at the air inlet and air outlet ends of each gas-filtering ventilation device (6), the channel comprising a central channel and a side channel, a vertical sealing baffle (4) being fixed on the side of the gas-filtering ventilation device (6) through the mounting rack (5), a protective sealed door (3) and an oil screen dust filter (8) being sealed and embedded on the vertical sealing baffle (4) facing the entrance of the channel, and a protective sealed door (3) being sealed and embedded on the sealing baffle (4) facing the exit of the channel.

2. According to claim 1, a method for building a human air defense and gas filtering ventilation system using a wide coal mine tunnel is characterized by: The gas filtering and ventilation device (6) comprises a plurality of groups of parallel gas filtering and ventilation units, the air inlet end of each gas filtering and ventilation unit being provided with a sealed valve (9), the air outlet end being provided with an explosion-proof fan (11), and a purification module (10) being connected between the sealed valve (9) and the explosion-proof fan (11).

3. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 1, characterized in that: The gap between the gas filtering and ventilation device (6) and the mounting rack (5) is filled with a sealing baffle (4).

4. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 1 is characterized by: An internal circulation purification device (7) is provided in the external space located at the channel outlet end in the lane (1).

5. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 1 is characterized in that: The air inlet end of the gas filtering ventilation device (6) faces the central channel, and the air outlet end of the gas filtering ventilation device (6) faces the side channel; Both ends of the side channel are sealed by protective sealed doors (3); an oil screen dust filter (8) is sealed at the inlet end of the central channel, and the outlet end is sealed by a protective sealed door (3).

6. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 1, characterized in that: The air inlet end of the gas filtering ventilation device (6) faces the side channel, and the air outlet end of the gas filtering ventilation device (6) faces the central channel; Both ends of the central channel are sealed by protective sealed doors (3); an oil screen dust filter (8) is sealed at the inlet end of the side channel, and the outlet end is sealed by a protective sealed door (3).

7. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 1, characterized in that: It comprises a plurality of serially connected human air-defense gas-filtering ventilation system units, wherein the air inlet and air outlet ends of the gas-filtering ventilation devices (6) of two adjacent human air-defense gas-filtering ventilation system units are installed in opposite directions.

8. The method of using wide coal mine tunnels to build a human air defense and gas filtering ventilation system according to claim 7, characterized in that: The air inlet end of the gas filter ventilation device (6) in the human air defense gas filter ventilation system unit located at the front end of the alley (1) faces the central channel, and the air outlet end faces the side channel; the air inlet end of the gas filter ventilation device (6) in the human air defense gas filter ventilation system unit located at the rear end of the alley (1) faces the side channel, and the air outlet end of the gas filter ventilation device (6) faces the central channel.

9. The method of using a wide coal mine tunnel to build a human air defense and gas filtering ventilation system according to claim 7, characterized in that: There is a gap between the two anti-gas filtering ventilation system units.

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