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

Abstract

The utility model relates to the technical field of civil air defense engineering, and discloses a civil air defense poison filtering and ventilating system built by using a wide roadway of a coal mine, which comprises one or more civil air defense poison filtering and ventilating system single bodies connected in series, and each civil air defense poison filtering and ventilating system single body comprises two cement bases fixed on 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 utility model relates to the technical field of civil air defense engineering, in particular to a civil air defense gas filtration ventilation system, specifically a civil air defense gas filtration ventilation system built by using a wide roadway in a coal mine. Background Technique

[0002] A civil air defense project refers to an underground protective building built to protect personnel and materials during wartime, civil air defense command, and medical rescue, as well as a basement that can be used for air defense during wartime in combination with a ground building. There is a very thick protective layer covering the civil air defense project, which can resist the fragments during the explosion of bombs and missiles, isolate nuclear radiation, biochemical 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 mostly built in combination with underground commercial spaces, such as subways, underground shopping malls, underground passages, etc. Such civil air defense projects combined with underground spaces generally have the following disadvantages:

[0003] 1. The resistance level is relatively low, generally a second-class personnel shelter and a material warehouse;

[0004] 2. The protection time is short. After failure, professional personnel 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 being poisoned;

[0005] 3. The air volume is small and cannot meet the ventilation requirement of more than 100,000 cubic meters per hour;

[0006] 4. A special installation site needs to be reserved, such as a gas filtration room and a dust filtration room, and the space utilization rate is low;

[0007] 5. Normal ventilation and wartime ventilation, wartime clean ventilation and wartime gas filtration ventilation;

[0008] 6. For wartime clean ventilation and gas filtration ventilation, the pipeline needs to be switched. Content of the Utility Model

[0009] In order to solve the above problems, the utility model provides a civil air defense gas filtration ventilation system built by using a wide roadway in a coal mine.

[0010] The utility model is realized by adopting the following technical scheme:

[0011] A civil air defense filter poison ventilation system built using a wide coal mine roadway, which includes one or more series-connected civil air defense filter poison ventilation system units. Each civil air defense filter poison ventilation system unit includes two cement bases hermetically fixed on the inner wall surface of the roadway. An installation rack is fixed between the two cement bases. Two groups of parallel filter poison ventilation devices are hermetically fixed on the installation rack. At the air inlet end and the air outlet end of each filter poison ventilation device, there are channels with the same direction as the roadway. The channels include a central channel and side channels. On the installation rack, a vertical sealing baffle is fixed on the side of the filter poison ventilation device through the installation rack. A protective airtight door and an oil mesh dust filter are hermetically embedded at the position on the vertical sealing baffle facing the channel entrance. A protective airtight door is hermetically embedded at the position on the sealing baffle facing the channel exit.

[0012] During implementation, it includes one civil air defense filter poison ventilation system unit. The civil air defense filter poison ventilation system unit includes two cement bases hermetically fixed on the inner wall surface of the roadway. The cement bases are built on the inner wall surface of the roadway as the installation matrix for construction. An installation rack is fixed between the two cement bases. The installation rack is arranged along the direction of the roadway and is used for the installation and fixation of the filter poison ventilation devices. The cement bases and the rack are the matrices for the installation and fixation of the civil air defense filter poison ventilation system, avoiding operations such as drilling, chiseling, and hoisting directly on the inner wall of the coal mine roadway to damage the geological structure of the roadway and increasing the risk of collapse; Two groups of parallel filter poison ventilation devices are hermetically fixed on the installation rack. Specifically, the gaps between the filter poison ventilation devices and the installation rack are filled with sealing baffles. The gaps between the pipes and cables between the filter poison ventilation devices and the installation rack are filled by the sealing baffles located in the upper part of the roadway. At the air inlet end and the air outlet end of each filter poison ventilation device, there are channels with the same direction as the roadway. The channels include a central channel and side channels. On the installation rack, a vertical sealing baffle is fixed on the side of the filter poison ventilation device through the installation rack. A protective airtight door and an oil mesh dust filter are hermetically embedded at the position on the vertical sealing baffle facing the channel entrance. Both the protective airtight door and the oil mesh dust filter adopt existing technologies. Among them, the oil mesh dust filter adopts a door structure and switches the ventilation mode by closing and opening. When closed, it filters large particle dust and impurities. When opened, the air passes directly through. A protective airtight door is hermetically embedded at the position on the sealing baffle facing the channel exit; An internal circulation purification device is provided in the external space at the channel outlet end in the roadway. Adopting existing technology, it circulates and purifies the air passing through the civil air defense filter poison ventilation system unit, and is used to purify a small amount of low-concentration pollutants leaked when the system switches modes.

[0013] Furthermore, the gas filtration and ventilation device includes several groups of parallel gas filtration and ventilation units. The number of gas filtration and ventilation units in each group is the same. A hermetic valve is provided at the air inlet end of the gas filtration and ventilation unit, and an explosion-proof fan is provided at the air outlet end. The device provides the power for air circulation, avoiding increasing the burden on the total mine ventilation system during gas filtration and ventilation, and avoiding affecting the balance of the ventilation volume of each roadway in the mine due to the increase in the ventilation resistance of the roadway where the civil air defense gas filtration and ventilation system is installed. A purification module is connected between the hermetic valve and the explosion-proof fan; that is, the air inlet end and the air outlet end of the gas filtration and ventilation unit are communicated with the adjacent channels.

[0014] As a way, the air inlet end of the gas filtration and ventilation device faces the central channel, and the air outlet end of the gas filtration and ventilation device faces the side channel; both ends of the side channel are sealed by protective airtight doors, the inlet end of the central channel is sealed with an oil mesh filter, and the outlet end is sealed by a protective airtight door.

[0015] During natural ventilation, the oil mesh filter and the protective airtight doors are all opened for personnel access and ventilation. Personnel and ventilation are carried out in the side channel and the central channel without protection, that is, the hermetic valve of the gas filtration and ventilation device is closed and there is no air convection.

[0016] In the clean ventilation mode, that is, the protective airtight doors at both ends of the side channel are closed, the oil mesh filter at the inlet end of the central channel is closed for filtration, the protective airtight door at the outlet end is opened, and the oil mesh filter plays a filtering role for clean ventilation. After the air enters the roadway, it is filtered by the inlet oil mesh filter for large-particle dust and impurities, then enters the central channel, and is sent out through the protective airtight door at the outlet end.

[0017] In the gas filtration and protection mode, that is, the protective airtight door at the inlet end of the side channel is closed, the oil mesh filter at the inlet end of the central channel is closed for filtration, the protective airtight door at the outlet end of the central channel is closed, while the protective airtight door at the outlet end of the side channel is opened. The oil mesh filter first plays a filtering role to filter large-particle dust and impurities. The air containing pollutants enters the central channel, is purified by the gas filtration and ventilation device for pollutants, enters the side channel, and the clean air is sent out through the protective airtight door at the outlet end of the side channel.

[0018] As another way, the air inlet end of the gas filtration and ventilation device faces the side channel, and the air outlet end of the gas filtration and ventilation device faces the central channel; both ends of the central channel are sealed by protective airtight doors, the inlet end of the side channel is sealed with an oil mesh filter, and the outlet end is sealed by a protective airtight door.

[0019] During natural ventilation, the oil mesh filter and the protective airtight doors are all opened for personnel access and ventilation. Personnel and ventilation are carried out in the side channel and the central channel without protection, that is, the hermetic valve of the gas filtration and ventilation device is closed and there is no air convection.

[0020] Adopt the clean ventilation mode, that is, the airtight protection doors at both ends of the central passage are closed, the oil mesh dust filters at the inlet ends of the side passages are closed for filtration, the airtight protection doors at the outlet ends are opened, and the oil mesh dust filters play a filtering role for clean ventilation. After the air enters the roadway, it passes through the inlet oil mesh dust filter to filter large particles of dust and impurities, then enters the central passage, and is sent out through the airtight protection door at the outlet end.

[0021] Adopt the gas filtration and protection mode, that is, the airtight protection door at the inlet end of the central passage is closed, the oil mesh dust filters at the inlet ends of the side passages are closed for filtration, the airtight protection doors at the outlet ends of the side passages are closed, while the airtight protection door at the outlet end of the central passage is opened. The oil mesh dust filters first play a filtering role to filter large particles of dust and impurities. The air containing pollutants enters the central passage, is purified by the gas filtration and ventilation device, enters the side passage, and the clean air is sent out through the airtight protection door at the outlet end of the side passage.

[0022] As another way, during implementation, it includes multiple series-connected single units of civil air defense gas filtration and ventilation systems. The single units of civil air defense gas filtration and ventilation systems are the same as when used alone. The inlet and outlet ends of the gas filtration and ventilation devices of adjacent two single units of civil air defense gas filtration and ventilation systems are installed in opposite directions to improve the gas filtration efficiency, and there is a gap between two single units of civil air defense gas filtration and ventilation systems.

[0023] Furthermore, the inlet end of the gas filtration and ventilation device in the single unit of civil air defense gas filtration and ventilation system at the front end of the roadway faces the central passage, and the outlet end faces the side passage; the inlet end of the gas filtration and ventilation device in the single unit of civil air defense gas filtration and ventilation system at the rear end of the roadway faces the side passage, and the outlet end of the gas filtration and ventilation device faces the central passage. Vice versa is also possible.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model provides a civil air defense gas filtration and ventilation system built by using a wide coal mine roadway. Utilizing the geological characteristics of the coal mine, it improves the resistance level, can resist stronger impact force. Multiple systems can be used in combination, and can quickly switch to the standby system function after one of the systems fails, extending the protection time; it realizes gas filtration and ventilation with a ventilation volume of more than 100,000 cubic meters per hour, improving the space utilization rate.

[0026] The gas filtration and ventilation devices are installed in parallel, which can install more gas filtration and ventilation devices in the same installation space, increase the air volume of gas filtration and ventilation, and improve the space utilization rate; the air volume of gas filtration and ventilation depends on the air volume of the gas filtration and ventilation device. The more the number of gas filtration and ventilation devices, the greater the amount of polluted air that can be processed.

[0027] This system is installed using the existing coal mine roadways. It is installed well usually, does not occupy extra space, does not affect the normal passage of personnel and ventilation, and uses the same set of ventilation pipelines both usually and during wartime. The ventilation mode is switched during the critical wartime, enabling a quick conversion between peacetime and wartime. It ventilates using the existing ventilation system of the coal mine without increasing the burden on the total ventilation system of the coal mine. Personnel in the coal mine can take shelter on the spot without the need to be transferred to a designated space. Description of the Drawings

[0028] Figure 1 It shows the schematic structural diagram of this system.

[0029] Figure 2 It shows the schematic structural diagram of the exit direction of this system.

[0030] Figure 3 It shows the schematic structural diagram of the inlet direction of this system.

[0031] Figure 4 It shows the schematic structural diagram of the single-filter ventilation unit.

[0032] Figure 5 It shows the usage state diagram of the single system in natural ventilation in Embodiment 1.

[0033] Figure 6 It shows the usage state diagram of the single system in the clean ventilation mode in Embodiment 1.

[0034] Figure 7 It shows the usage state diagram of the single system in the filtered ventilation mode in Embodiment 1.

[0035] Figure 8 It shows the schematic structural diagram of the inlet end of the single system in Embodiment 2.

[0036] Figure 9 It shows the usage state diagram of the single system in natural ventilation in Embodiment 2.

[0037] Figure 10 It shows the usage state diagram of the single system in the clean ventilation mode in Embodiment 2.

[0038] Figure 11 It shows the usage state diagram of the single system in the filtered ventilation mode in Embodiment 2.

[0039] Figure 12 It shows the usage state diagram of the double system in the clean ventilation mode in Embodiment 3.

[0040] Figure 13 It shows the usage state diagram of the double system in the mode of pre-filtered ventilation and then clean ventilation in Embodiment 3.

[0041] Figure 14 It shows the usage state diagram of the double system in the filtered ventilation mode in Embodiment 3.

[0042] In the figure: 1 - roadway, 2 - cement pedestal, 3 - airtight protection door, 4 - sealing baffle, 5 - installation rack, 6 - poison filtration ventilation device, 7 - internal circulation purification device, 8 - oil mesh air filter, 9 - airtight valve, 10 - purification module, 11 - explosion-proof fan. Specific implementation mode

[0043] The specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Embodiment 1

[0044] A civil air defense poison filtration ventilation system is built using a wide coal mine roadway, as Figures 1 - 7 shown: It includes a single unit of the civil air defense poison filtration ventilation system. The single unit of the civil air defense poison filtration ventilation system includes two cement pedestals 2 hermetically fixed on the inner wall surface of the roadway 1, serving as the installation matrix for construction. An installation rack 5 is fixed between the two cement pedestals 2. The installation rack 5 is arranged along the direction of the roadway 1 and is used for the installation and fixation of the poison filtration ventilation device 6, avoiding drilling holes in the roadway and changing the roadway structure. Two groups of parallel poison filtration ventilation devices 6 are hermetically fixed on the installation rack 5. Specifically, the gap between the poison filtration ventilation device 6 and the installation rack 5 is filled with a sealing baffle 4. The gap between the poison filtration ventilation device 6 and the installation rack 5 is filled by the sealing baffle 4 located at the upper part of the roadway 1. Pipes and cables pass through the gap. Each inlet end and outlet end of the poison filtration ventilation device 6 leave a passage in the same direction as the roadway 1. The passage includes a central passage and a side passage. A vertical sealing baffle 4 is fixed on the side of the installation rack 5 where the poison filtration ventilation device 6 is located through the installation rack 5. An airtight protection door 3 and an oil mesh air filter 8 are hermetically embedded at the position opposite to the passage entrance on the vertical sealing baffle 4. Both the airtight protection door 3 and the oil mesh air filter 8 adopt existing technologies. Among them, the oil mesh air filter 8 adopts a door structure and switches the ventilation mode by closing and opening. When closed, it filters large particle dust and impurities, and when opened, air directly passes through. An airtight protection door 3 is hermetically embedded at the position opposite to the passage exit on the sealing baffle 4. An internal circulation purification device 7 is provided in the external space at the outlet end of the passage in the roadway 1. It adopts existing technology to circulate and purify the air passing through the single unit of the civil air defense poison filtration ventilation system, and is used to purify a small amount of low-concentration pollutants leaked when the system switches modes.

[0045] Preferably, the gas filtration and ventilation device 6 includes 6 groups of juxtaposed gas filtration and ventilation units. A hermetic valve 9 is provided at the air inlet end of each gas filtration and ventilation unit, and an explosion-proof fan 11 is provided at the air outlet end; a purification module 10 is connected between the hermetic valve 9 and the explosion-proof fan 11; that is, the air inlet end and the air outlet end of the gas filtration and ventilation unit are communicated with the adjacent channels; in this embodiment, the air inlet end of the gas filtration and ventilation device 6 faces the central channel, that is, the air inlet end of the gas filtration and ventilation unit faces the central channel, and the air outlet end of the gas filtration and ventilation device 6 faces the side channel, that is, the air outlet end of the gas filtration and ventilation unit faces the side channel; both ends of the side channel are sealed by the protective airtight doors 3, the oil screen dust filter 8 is hermetically installed at the inlet end of the central channel, and the outlet end is sealed by the protective airtight door 3.

[0046] As Figure 5 shown: During natural ventilation, the oil screen dust filter 8 and the protective airtight doors 3 are all opened for personnel entry and exit and ventilation. Personnel and ventilation are carried out in the side channel and the central channel without protection, that is, the hermetic valve of the gas filtration and ventilation device is closed and there is no air convection.

[0047] As Figure 6 shown: In the clean ventilation mode, that is, the protective airtight doors 3 at both ends of the side channel are closed, the oil screen dust filter 8 at the inlet end of the central channel is closed for filtration, the protective airtight door 3 at the outlet end is opened, and the oil screen dust filter 8 plays a filtering role for clean ventilation. After the air enters the roadway 1, it is filtered by the large-particle dust and impurities by the oil screen dust filter 8 and then enters the central channel and is sent out through the protective airtight door 3 at the outlet end.

[0048] As Figure 7 shown: In the gas filtration and protection mode, that is, the protective airtight door 3 at the inlet end of the side channel is closed, the oil screen dust filter 8 at the inlet end of the central channel is closed for filtration, the protective airtight door 3 at the outlet end of the central channel is closed, while the protective airtight door 3 at the outlet end of the side channel is opened. The oil screen dust filter 8 first plays a filtering role to filter large-particle dust and impurities. The air containing pollutants enters the central channel, is purified by the gas filtration and ventilation device 6, enters the side channel, and the clean air is sent out through the protective airtight door 3 at the outlet end of the side channel. Embodiment 2

[0049] A civil air defense gas filtration and ventilation system built using a wide coal mine roadway, as Figures 8 - 11 shown: Except for the installation directions of the air inlet end and the air outlet end of the gas filtration and ventilation device 6, the rest are the same as in Embodiment 1. The air inlet end of the gas filtration and ventilation device 6 faces the side channel, and the air outlet end of the gas filtration and ventilation device 6 faces the central channel; both ends of the central channel are sealed by the protective airtight doors 3, the oil screen dust filter 8 is hermetically installed at the inlet end of the side channel, and the outlet end is sealed by the protective airtight door 3.

[0050] As Figure 9As shown in the figure: During natural ventilation, the oil screen dust filter 8 and the airtight blast door 3 are all opened for personnel access and ventilation. Personnel and ventilation are carried out in the side passage and the central passage without protection, that is, the airtight valve of the gas filtration ventilation device is closed and there is no air convection.

[0051] As Figure 10 shown in the figure: The clean ventilation mode is adopted, that is, the airtight blast doors 3 at both ends of the central passage are closed, the oil screen dust filter 8 at the inlet end of the side passage is closed for filtration, the airtight blast door 3 at the outlet end is opened, and the oil screen dust filter 8 plays a filtering role for clean ventilation. After the air enters the roadway 1, it is filtered by the large-particle dust and impurities by the inlet oil screen dust filter 8 and then enters the central passage, and is sent out through the airtight blast door 3 at the outlet end.

[0052] As Figure 11 shown in the figure: The gas filtration and protection mode is adopted, that is, the airtight blast door 3 at the inlet end of the central passage is closed, the oil screen dust filter 8 at the inlet end of the side passage is closed for filtration, the airtight blast door 3 at the outlet end of the side passage is closed, while the airtight blast door 3 at the outlet end of the central passage is opened. The oil screen dust filter 8 first plays a filtering role to filter large-particle dust and impurities. The air containing pollutants enters the central passage, is purified by the gas filtration ventilation device 6, enters the side passage, and the clean air is sent out through the airtight blast door 3 at the outlet end of the side passage. Embodiment 3

[0053] A civil air defense gas filtration ventilation system built by using a wide coal mine roadway adopts a combined use method of inlet air from both sides and outlet air in the middle and inlet air in the middle and outlet air from both sides. As Figures 12 - 14 shown in the figure: It includes two series-connected civil air defense gas filtration ventilation system units, which can meet the long-term shelter needs of personnel. The installation directions of the gas filtration ventilation devices 6 of the civil air defense gas filtration ventilation system units are opposite, and there is a gap between the two civil air defense gas filtration ventilation system units. Further, the inlet end of the gas filtration ventilation device 6 in the civil air defense gas filtration ventilation system unit at the front end of the roadway 1 faces the central passage, and the outlet end faces the side passage; the inlet end of the gas filtration ventilation device 6 in the civil air defense gas filtration ventilation system unit at the rear end of the roadway 1 faces the side passage, and the outlet end of the gas filtration ventilation device 6 faces the central passage.

[0054] As Figure 12 shown in the figure: The dual-system adopts the clean ventilation mode. The civil air defense gas filtration ventilation system unit at the front end of the roadway 1 conducts clean ventilation on the air from the central passage, and the civil air defense gas filtration ventilation system unit at the rear end of the roadway conducts clean ventilation on the air from the side passage, that is, the two layers of oil screen dust filters 8 are filtered successively to improve the clean filtration effect.

[0055] As Figure 13As shown in the figure: In the double-system pre-filtering ventilation and post-cleaning ventilation mode, the individual civil air defense filtering ventilation system at the front end of roadway 1 is first converted to the filtering ventilation mode, while the individual civil air defense filtering ventilation system at the rear end of roadway 1 remains in the cleaning ventilation mode. That is, filtering ventilation is carried out first, and then filtration is carried out.

[0056] As Figure 14 As shown in the figure: In the double-system filtering ventilation mode, when the filtering ventilation device 6 in the individual civil air defense filtering ventilation system at the front end fails, the individual civil air defense filtering ventilation system at the rear end of roadway 1 is enabled to switch to the filtering ventilation mode, which can effectively extend the protection filtering time. Embodiment 4

[0057] A civil air defense filtering ventilation system built using a wide coal mine roadway, applicable when the roadway width is relatively wide and there are fewer pipelines or lines on both sides, includes more than two individual civil air defense filtering ventilation systems. The individual civil air defense filtering ventilation systems are connected in series, and the installation directions of the filtering ventilation devices 6 of adjacent individual civil air defense filtering ventilation systems are opposite; that is, a civil air defense filtering ventilation system built using a wide coal mine roadway in Embodiment 1 or Embodiment 2 is alternately arranged in series. After a certain individual civil air defense filtering ventilation system fails, filtering ventilation can also be achieved using other individual civil air defense filtering ventilation systems, which can effectively extend the protection time.

[0058] The scope of protection claimed by the present utility model is not limited to the above specific embodiments. Moreover, for those skilled in the art, the present utility model can have various deformations and modifications. Any modification, improvement, and equivalent replacement made within the concept and principle of the present utility model should be included within the protection scope of the present utility model.

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), the air inlet end and the air outlet end of each gas-filtering ventilation device (6) leaving a channel in the same direction as the tunnel (1), 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.

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