A dual-hole complementary construction ventilation system and control method

Abstract

The present invention discloses a dual-tunnel complementary construction ventilation system and a control method, wherein a first pressure-in type fan is arranged at the entrance of the first tunnel, the first pressure-in type fan is connected to a first pressure-in type air duct, and the air outlet of the first pressure-in type air duct faces the tunnel face of the first tunnel, a second pressure-in type fan is arranged at the entrance of the second tunnel, the second pressure-in type fan is connected to a second pressure-in type air duct, and the air outlet of the second pressure-in type air duct faces the tunnel face of the second tunnel, a first wet dust removal device and a second wet dust removal device are arranged on a vehicle cross passage connecting the first tunnel and the second tunnel, an air inlet end of the first wet dust removal device faces the tunnel face of the second tunnel, and an air outlet end of the first wet dust removal device is arranged towards the first tunnel, an air inlet end of the second wet dust removal device faces the tunnel face of the first tunnel, and an air outlet end of the second wet dust removal device faces the second tunnel, and the wet dust removal devices cooperate with the pressure-in type fan to work, so as to reduce equipment wear.

Description

Technical Field

[0001] The present invention relates to a double-tunnel complementary construction system, in particular to a double-tunnel complementary construction ventilation system and a control method, which are applied to the technical field of tunnel construction ventilation and energy saving. Background Art

[0002] To ensure the continued advancement of the Western Development Strategy, my country's western region urgently needs to develop and complete a network of highway tunnels. Considering the unique and complex geological conditions of the western region and the future operational safety of tunnels, an increasing number of twin-hole, single-track tunnels are emerging. During tunnel excavation, safe, economical, and appropriate ventilation technology plays a crucial role, impacting not only the effectiveness and cost of tunnel construction but, more importantly, the health of construction workers.

[0003] Currently, the theory and technology of dual-tunnel single-line operational ventilation have matured. Since Bener et al. proposed the concept of "dual-tunnel complementarity," numerous scholars, including Xia Fengyong and Wang Yaqiong, have continuously researched, supplemented, and improved the theoretical framework for dual-tunnel complementary operational ventilation. In operational ventilation, the differences in the slopes and traffic flow compositions of the left and right tunnels lead to different air volume requirements. Using the excess, high-quality fresh air in the downhill tunnel to dilute the poor-quality, polluted air in the uphill tunnel effectively reduces pollutant concentrations, while also lowering energy consumption and minimizing initial investment.

[0004] In comparison, tunnel construction ventilation theory and technology still have significant room for development, with most construction sites still utilizing traditional ventilation methods such as pressure-in and hybrid ventilation. While these methods have proven to be relatively mature ventilation methods based on past construction, they all require high-power ventilation equipment for both tunnels. Furthermore, during construction, the construction procedures for the two tunnels often differ, often resulting in high-powered ventilation equipment in one tunnel while idle or unventilated in the other, leading to significant energy loss. Furthermore, during face-mounted concrete spraying and post-blasting slag removal, significant dust generation occurs near the face. Traditional ventilation methods are difficult to quickly and effectively remove near-face dust, causing it to spread throughout the tunnel, creating a harsh construction environment and severely endangering the health of construction workers.

[0005] In order to reduce the energy consumption of high-power ventilation equipment, Chinese patent application number: CN200910062967.1 discloses a complementary network ventilation method for double-hole tunnels. By opening two additional cross channels and installing jet fans in the vehicle cross channel, the surplus air of better quality in the downhill tunnel is extracted into the uphill tunnel to dilute the polluted air; Chinese patent application number: CN201610793565.9 discloses a tunnel construction ventilation air volume guide distribution device and method. The push-in air ducts of the left and right tunnels are connected in parallel through a guide distribution box. When the wind demand on one side of the tunnel is large, the surplus air of the air duct on the opposite side is introduced into the air duct on that side through the distribution box to meet the ventilation demand.

[0006] Clearly, these methods all exploit the differences in air volume requirements caused by varying tunnel construction procedures, transferring excess air from the tunnel with lower air volume requirements to the tunnel on the opposite side with higher air volume requirements, thereby diluting the polluted air. However, when implementing these methods, the positioning of the devices is difficult to determine due to the influence of terrain and tunnel structure. Furthermore, the air supplied to the opposite tunnel is not fresh air but often contains some dust. After mixing with the polluted return air from the opposite tunnel, the dust concentration ultimately discharged into the tunnel still exceeds the emission standard. Summary of the Invention

[0007] In response to the above-mentioned problems in the ventilation methods of the existing technology in tunnel construction, such as high energy consumption, restricted device installation locations, and substandard pollutant emissions, the present invention provides a dual-tunnel complementary construction ventilation system and control method. By adopting two wet dust removal equipment, they are installed in the tunnel's vehicle cross channel and work in conjunction with a push-in fan, effectively reducing the waste of air volume and equipment power, reducing equipment wear, and saving energy. At the same time, the wet dust removal equipment will supplement the purified recycled air to the tunnel on the other side, diluting the return polluted air of the tunnel, so that the concentration of the polluted air discharged out of the tunnel meets the emission standards.

[0008] The technical solution adopted by the present invention to solve the technical problem is: a double-hole complementary construction ventilation system,

[0009] It includes a first pressure-in fan, a second pressure-in fan, a first wet dust removal device and a second wet dust removal device. The first pressure-in fan is arranged at the entrance of the first tunnel. The first pressure-in fan is connected to a first pressure-in air duct. The air outlet of the first pressure-in air duct faces the heading of the first tunnel. The second pressure-in fan is arranged at the entrance of the second tunnel. The second pressure-in fan is connected to a second pressure-in air duct. The air outlet of the second pressure-in air duct faces the heading of the second tunnel. The first wet dust removal device and the second wet dust removal device are arranged on a vehicle cross passage connecting the first tunnel and the second tunnel. The air inlet end of the first wet dust removal device faces the heading of the second tunnel, and the air outlet end of the first wet dust removal device faces the first tunnel. The air inlet end of the second wet dust removal device faces the heading of the first tunnel, and the air outlet end of the second wet dust removal device faces the second tunnel.

[0010] Furthermore, the distance from the air outlet of the first pressure-type air duct to the tunnel face of the first tunnel is the same as the distance from the air outlet of the second pressure-type air duct to the tunnel face of the second tunnel.

[0011] Furthermore, the air inlet end of the first wet dust removal equipment is closer to the working face of the second tunnel than the air outlet of the second pressure-type air duct; the air inlet end of the second wet dust removal equipment is closer to the working face of the first tunnel than the air outlet of the first pressure-type air duct.

[0012] Furthermore, the first wet dust removal equipment and the second wet dust removal equipment both include a frame, a wet dust collector, an exhaust fan and a water tank. The wet dust collector, the exhaust fan and the water tank are respectively installed on the frame. The air inlet of the exhaust fan is connected to the wet dust collector. An exhaust air duct is provided on the air inlet end of the wet dust collector. A sewage pipe is provided on the wet dust collector. The sewage pipe is connected to the water tank. A water supply pipe is provided on the water tank. The water supply pipe is connected to the wet dust collector. A water supply pump is connected in series on the water supply pipe.

[0013] Furthermore, the exhaust air duct of the first wet dust removal equipment and the exhaust air duct of the second wet dust removal equipment are arranged in a staggered manner in the vehicle transverse passage.

[0014] Furthermore, a baffle is provided in the water tank to separate the water tank into a sewage chamber and a clean water chamber. The baffle is arranged along the vertical direction of the water, and the bottom and both sides of the baffle are sealed with the box body of the water tank.

[0015] Furthermore, a sedimentation chamber is provided in the water tank, the sedimentation chamber is arranged corresponding to the bottom of the sewage chamber, and filter plates are provided between the sewage chamber and the sedimentation chamber.

[0016] Furthermore, a filter is connected in series on the water supply pipe, and the filter is arranged on the water supply pipe between the water supply pump and the water tank.

[0017] Furthermore, a sewage pump is provided at the bottom of the frame, and the sewage pump is connected to the sedimentation chamber through a sewage pipe.

[0018] Furthermore, a running system assembly is provided at the bottom of the frame.

[0019] The present invention also adopts a technical solution to solve the technical problem: a control method based on the above-mentioned double-hole complementary construction ventilation system, the control method comprising the following steps:

[0020] S1. Determine the construction status of the first tunnel and the second tunnel;

[0021] S2. Regulating the power of the first pressure-type fan according to the construction status of the first tunnel and the second tunnel; regulating the power of the second pressure-type fan;

[0022] S3. Turning on or off the first wet dust removal equipment according to the construction status of the first tunnel and the second tunnel;

[0023] Turn the second wet dust removal equipment on or off.

[0024] Beneficial effects of the present invention: The present invention provides a dual-tunnel complementary construction ventilation system and control method. By adopting two wet dust removal equipment, installing them in the tunnel's vehicle cross channel, and working in conjunction with a push-in fan, the air volume and equipment power waste are effectively reduced, equipment wear is reduced, and energy is saved. At the same time, the wet dust removal equipment supplements the purified recycled air to the tunnel on the other side, diluting the return polluted air of the tunnel, so that the concentration of the polluted air discharged out of the tunnel meets the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of the installation of the dual-hole complementary construction ventilation system of the present invention in a dual-hole tunnel;

[0026] FIG2 is a schematic structural diagram of the wet dust removal equipment of the present invention in a front view;

[0027] FIG3 is a schematic structural diagram of the wet dust removal equipment of the present invention when viewed from above.

[0028] Figure numerals: 1 - first tunnel; 2 - second tunnel; 3 - vehicle cross passage; 4 - first forced-in fan; 5 - second forced-in fan; 6 - first wet dust removal device; 7 - second wet dust removal device; 85 - first forced-in air duct; 9 - second forced-in air duct; 101 - vehicle frame; 102 - wet dust collector; 103 - exhaust fan; 104 - water tank; 1041 - sewage chamber; 1042 - clean water chamber; 1043 - baffle; 1044 - sedimentation chamber; 1045 - filter plate; 105 - exhaust air duct; 106 - sewage pipe; 107 - water supply pipe; 108 - water supply pump; 109 - filter; 1010 - sewage pump; 1011 - sewage pipe; 1012 - running system assembly. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Please refer to Figures 1-3. A double-tunnel complementary construction ventilation system provided by the present invention includes a first pressure-in fan 4, a second pressure-in fan 5, a first wet dust removal device 6 and a second wet dust removal device 7. The first 15 pressure-in fan 4 is arranged at the entrance of the first tunnel 1, and the first pressure-in fan 4 is connected to a first pressure-in air duct 8. The air outlet of the first pressure-in air duct 8 faces the tunnel face of the first tunnel 1. The second pressure-in fan 5 is arranged at the entrance of the second tunnel 2. The second pressure-in fan 5 is connected to a second pressure-in air duct 9. The air outlet of the second pressure-in air duct 9 faces the tunnel face of the second tunnel 2. The first wet dust removal device 6 and the second wet dust removal device 7 are arranged on a vehicle cross passage 3 connecting the first tunnel 1 and the second tunnel 2. The air inlet end of the first wet dust removal device 6 faces the tunnel face of the second tunnel 2, and the air outlet end of the first wet dust removal device 6 faces the tunnel face of the first tunnel 1. The air inlet of the second wet dust removal device 7 is directed toward the tunnel face of the first tunnel 1, and the air outlet of the second wet dust removal device 7 is directed toward the second tunnel 2. Installed in the tunnel's traffic crossway and working in conjunction with a forced-in blower, this effectively reduces air volume and equipment power waste, reduces equipment wear, and saves energy. Simultaneously, the wet dust removal device replenishes purified recycled air to the tunnel on the other side, diluting the return polluted air in that tunnel so that the polluted air concentration discharged from the tunnel meets emission standards. The forced-in blower uses an axial flow fan.

[0031] In order to facilitate the management of the ventilation system for the complementary construction of two tunnels and ensure the best use effect, the distance from the outlet of the first pressure-type air duct 8 to the tunnel face of the first tunnel 1 is the same as the distance from the outlet of the second pressure-type air duct 9 to the tunnel face of the second tunnel 2.

[0032] In this embodiment, in order to increase the dilution effect of the tunnel's polluted air, the air inlet end of the first wet dust removal equipment 6 is closer to the tunnel face of the second tunnel 2 than the air outlet of the second pressure-type air duct 9; the air inlet end of the second wet dust removal equipment 7 is closer to the tunnel face of the first tunnel 1 than the air outlet of the first pressure-type air duct 8.

[0033] In this embodiment, the first wet dust removal device 6 and the second wet dust removal device 7 both include a frame 101, a wet dust collector 102, an exhaust fan 103 and a water tank 104. The wet dust collector 102, the exhaust fan 103 and the water tank 104 are respectively installed on the frame 101. The air inlet of the exhaust fan 103 is connected to the wet dust collector 102. An exhaust air duct 105 is provided on the air inlet end of the wet dust collector 102. A sewage pipe 106 is provided on the wet dust collector 102, and the sewage pipe 106 is connected to the water tank 104. A water supply pipe 107 is provided on the water tank 104, and the water supply pipe 107 is connected to the wet dust collector 102. A water supply pump 108 is connected in series to the water supply pipe 107. In specific implementation, the wet dust collector preferably adopts a two-stage dust collector consisting of a spray and a wet chord-grid water film. The water purified by the water tank is supplied to the wet dust collector by the water supply pump for recycling. In order to further filter the water, a filter is installed on the water supply pipe. The filter 109 is set on the water supply pipe 107 between the water supply pump 108 and the water tank 104, which can solve the problem of water shortage in the tunnel. The end of the exhaust air duct on the wet dust removal equipment extends to the vicinity of the tunnel face.

[0034] It can shorten the time for removing blasting smoke, dust, etc. near the face. The wet dust removal equipment determines its horizontal installation angle β according to the specific geological conditions and structure of the tunnel and the cross passage. The β value is between 15 and 30 degrees. The preferred β value when the air volume monitoring section value is the largest is 20 degrees, so that the air outlet end of the wet dust removal equipment can smoothly supplement the purified recycled air to the tunnel on the side where the air volume is larger, further dilute the returned polluted air, and make the concentration of the polluted air discharged out of the tunnel meet the emission standards. In this embodiment, the exhaust air duct of the first wet dust removal equipment 6 and the exhaust air duct of the second wet dust removal equipment 7 are arranged in a high and low staggered manner in the vehicle cross passage 3 to ensure that the purified recycled air flow can be smoothly discharged from the air outlet end of the wet dust removal equipment.

[0035] In this embodiment, a baffle 1043 is provided in the water tank 104 to separate the water tank 104 into a sewage chamber 1041 and a clean water chamber 1042. The baffle 1043 is arranged in the vertical direction of the water, and the bottom and both sides of the baffle 1043 are sealed with the box body of the water tank 104. The sewage generated by the wet dust collector 102 flows into the sewage chamber 1041 of the water tank 104, and the upper circulating water flows over the baffle 1043 and enters the clean water chamber 1042; a sedimentation chamber 1044 is provided in the water tank 104, and the sedimentation chamber 1044 is arranged corresponding to the bottom of the sewage chamber 1041. Filter plates 1045 are provided in the sewage chamber 1041 and the sedimentation chamber 1044. The dust, mud and water slurry in the lower layer passes through the filter plate 1045 and enters the sedimentation chamber 1044. In this embodiment, a sewage pump 1010 is provided at the bottom of the frame 101, and the sewage pump 1010 passes through the sewage pipe 1011 It is connected to the sedimentation chamber 1044 to discharge the dust, mud and water slurry. In specific implementation, a discharge port can also be directly provided at the bottom of the sedimentation chamber 1044. The filter plate 1045 is provided with a plurality of through holes for the dust, mud and water slurry to pass through.

[0036] In this embodiment, in order to facilitate the movement of the wet dust removal equipment, a running system assembly 1012 is provided at the bottom of the frame 101. The running system assembly 1012 includes wheels and suspension, etc., and is driven by a tractor to move the wet dust removal equipment.

[0037] The present invention also provides: a control method based on the above-mentioned dual-tunnel complementary construction ventilation system, the control method comprising the following steps: S1, judging the construction status of the first tunnel 1 and the second tunnel 2;

[0038] S2. According to the construction status of the first tunnel 1 and the second tunnel 2, the power of the first pressure-type fan 4 is adjusted; the power of the second pressure-type fan 5 is adjusted;

[0039] S3. According to the construction status of the first tunnel 1 and the second tunnel 2, the first wet dust removal equipment 6 is turned on or off; and the second wet dust removal equipment 7 is turned on or off.

[0040] Specifically, the dual-tunnel complementary construction ventilation system was installed: two wet dust collectors were installed in the vehicle-carrying transverse tunnel. The specific horizontal mounting angle β of the two wet dust collectors was determined based on the structural characteristics of the two tunnels and the transverse tunnel. The exhaust ducts of the two wet dust collectors were arranged at a height difference within the transverse tunnel, with the ends of the two exhaust ducts extending to the near-face of each tunnel. The exhaust ducts of the two wet dust collectors, along with the pressure-type fans and pressure-type ducts of the two tunnels, together formed the ventilation system.

[0041] Distribution of ventilation and recycled air volume: A dual-tunnel complementary construction ventilation system is used to distribute ventilation and recycled air volume based on the excavation status of the two tunnels (i.e., the ongoing construction process). When one tunnel is in the post-blasting and slag-discharging state and the other tunnel is in the drilling state, the power of the pressure-type fan on the post-blasting and slag-discharging tunnel side is increased, while the power of the pressure-type fan on the drilling-drilling tunnel side is decreased. The exhaust fan on the wet dust removal equipment near the post-blasting and slag-discharging tunnel in the vehicle-carrying cross passage is activated to purify the polluted air on the drilling-drilling tunnel side. The purified recycled airflow can further dilute the return polluted air in the post-blasting and slag-discharging tunnel. At this time, only one of the two wet dust removal equipment in the cross passage is in operation.

[0042] When the construction conditions of the two tunnels change, the power and air volume of the pressure fans at the tunnel entrances and the start and stop of the two wet dust removal equipment in the vehicle cross channel are adjusted accordingly: for example, when the excavation construction status of the two tunnels is the slag discharge state after excavation, the power of the pressure fans at the two tunnel entrances is increased to increase the air supply volume. At this time, the two wet dust removal equipment in the cross channel are both in operation.

[0043] The control method of the dual-tunnel complementary construction ventilation system adopted is flexible in use, so that the pressure fans installed at the two tunnel entrances have two gears, high and low. The two pressure fans of the same power will be divided into three gears: low-low (that is, both pressure fans are running at low power), high-low (that is, one pressure fan is running at high power and the other pressure fan is running at low power) and high-high (that is, both pressure fans are running at high power); the two wet dust removal equipment are installed with two gears, open and closed. The two wet dust removal equipment with the same structure will be divided into three gears: single open (that is, only one of the two wet dust removal equipment is in operation), double open (that is, both wet dust removal equipment are in operation) and double closed (that is, both wet dust removal equipment are not in operation). The gear ratio can be adjusted to meet ventilation needs based on the actual air volume required during on-site construction. For example, after double-hole blasting and slag discharge, the pressure-in fans at the two tunnel entrances use a high-high gear ratio, and the two wet dust removal equipment in the vehicle cross passage adopt a double-gear ratio. When blasting and slag discharge are completed in one tunnel and drilling and loading explosives in the other tunnel, the wet dust removal equipment uses a high-low gear ratio, and the two wet dust removal equipment in the vehicle cross passage adopt a single gear ratio. While ensuring ventilation effectiveness, compared to the original ventilation solution, the power configuration of the tunnel's overall ventilation system can be appropriately reduced, reducing air volume and equipment power waste, reducing equipment wear, and saving energy. It also has a reasonable structural design and good performance. Both wet dust removal equipment can be installed in the existing vehicle cross passage, without occupying the construction passage.

[0044] In the specific implementation, taking a tunnel as an example, the best working condition is selected by comparing the dust removal effect of the double-hole complementary construction ventilation system under different working conditions, as well as the size and smoothness of the recycled air discharged from the outlet of the wet dust removal equipment to the tunnel, for use in the tunnel excavation construction site.

[0045] The tunnel is a twin-hole, single-track tunnel, 3,349 meters long, 14.8 meters wide, and 7.49 meters high, making it an extra-long highway tunnel. The vehicular corridor connecting the two tunnels is approximately 20 meters long, 7.25 meters wide, and 6.98 meters high. The existing ventilation method is forced-in ventilation, with forced-in ducts located at the arch waist, approximately 3.5 meters above ground level and 1.4 meters in diameter. The single forced-in fans at both tunnel entrances have a power of 2 × 54 kW and a high-efficiency air volume of 1,550 m³ / min.

[0046] Based on the above description, a preliminary 70-meter-long tunnel model was established. The tunnel face was set as the dust source, with dust moving toward the tunnel entrance at a constant speed. The tunnel cross-sections 40 meters from the tunnel face were set as dust concentration monitoring surfaces. The wet dust removal equipment was 4-5 meters long, 1.5-2.5 meters wide, and 3-4 meters high.

[0047] Due to the unique placement of the two wet dust collection units within the transverse aisle, the exhaust air ducts on the wet dust collection vehicles must be staggered during installation. This results in a height difference ∆h between the exhaust air duct ends located near the tunnel faces of the two tunnels. By adopting an exhaust air duct diameter of 0.7m, the height difference ∆h between the two exhaust air duct axes is at least 0.7m. When the exhaust air duct in one tunnel is 25m from the tunnel face, with its axis at 0.7m above the upper step, and the exhaust air duct in the other tunnel is 25m from the tunnel face, with its axis at 1.5m above the upper step (satisfying ∆h > 0.7m), and a pressure-extraction ratio of 1:0.5, the sum of the concentration values at the monitoring sections in the two tunnels is minimized. In addition, the section where the vehicle cross passage connects with the tunnel is set as the air volume monitoring section. While ensuring that the purified recycled air flow can be smoothly discharged from the air outlet, and that one side of the vehicle cross passage can be used for vehicle passage in the event of an emergency in the tunnel, the horizontal installation angle β of the wet dust removal equipment is changed, and the optimal air duct layout method with the best dust removal effect is combined with the horizontal installation angle of the wet dust removal equipment for use in the tunnel construction site.

[0048] It should be understood that the application of the present invention is not limited to the above examples. Those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the present invention.

Claims

1. A double-hole complementary construction ventilation system, characterized in that: The invention comprises a first pressure-in blower (4), a second pressure-in blower (5), a first wet dust removal device (6) and a second wet dust removal device (7), wherein the first pressure-in blower (4) is arranged at the opening of the first tunnel (1), the first pressure-in blower (4) is connected to a first pressure-in blower duct (8), the air outlet of the first pressure-in blower duct (8) faces the tunnel face of the first tunnel (1), the second pressure-in blower (5) is arranged at the opening of the second tunnel (2), the second pressure-in blower ( 5) is connected to a second pressurized air duct (9), the air outlet of the second pressurized air duct (9) is directed toward the tunnel face of the second tunnel (2), the first wet dust removal device (6) and the second wet dust removal device (7) are arranged on a vehicle cross passage (3) for connecting the first tunnel (1) and the second tunnel (2), the air inlet end of the first wet dust removal device (6) is directed toward the tunnel face of the second tunnel (2), the air outlet end of the first wet dust removal device (6) is directed toward the first tunnel (1), the air inlet end of the second wet dust removal device (7) is directed toward the tunnel face of the first tunnel (1), and the air outlet end of the second wet dust removal device (7) is directed toward the second tunnel (2); The distance from the air outlet of the first pressure-type air duct (8) to the tunnel face of the first tunnel (1) is the same as the distance from the air outlet of the second pressure-type air duct (9) to the tunnel face of the second tunnel (2); The air inlet end of the first wet dust removal device (6) is closer to the tunnel face of the second tunnel (2) than the air outlet of the second pressure-type air duct (9); the air inlet end of the second wet dust removal device (7) is closer to the tunnel face of the first tunnel (1) than the air outlet of the first pressure-type air duct (8); The first wet dust removal device (6) and the second wet dust removal device (7) both comprise a vehicle frame (101), a wet dust collector (102), an exhaust fan (103) and a water tank (104). The wet dust collector (102), the exhaust fan (103) and the water tank (104) are respectively mounted on the vehicle frame (101). The air inlet of the exhaust fan (103) is connected to the wet dust collector (102). An exhaust air duct (105) is provided on the air inlet end of the wet dust collector (102). A sewage pipe (106) is provided on the wet dust collector (102). The sewage pipe (106) is connected to the water tank (104). A water supply pipe (107) is provided on the water tank (104). The water supply pipe (107) is connected to the wet dust collector (102). A water supply pump (108) is connected in series to the water supply pipe (107).

2. A double-hole complementary construction ventilation system according to claim 1, characterized in that: The exhaust air duct of the first wet dust removal device (6) and the exhaust air duct of the second wet dust removal device (7) are arranged in a staggered manner in height in the vehicle transverse passage (3).

3. A double-hole complementary construction ventilation system according to claim 1, characterized in that: A baffle (1043) is provided in the water tank (104) for dividing the water tank (104) into a sewage chamber (1041) and a clean water chamber (1042). The baffle (1043) is arranged along the vertical direction of the water, and the bottom and both sides of the baffle (1043) are sealedly connected to the body of the water tank (104).

4. A double-hole complementary construction ventilation system according to claim 3, characterized in that: A sedimentation chamber (1044) is provided in the water tank (104), and the sedimentation chamber (1044) is arranged corresponding to the bottom of the sewage chamber (1041). A filter plate (1045) is provided between the sewage chamber (1041) and the sedimentation chamber (1044).

5. The double-hole complementary construction ventilation system according to claim 1 is characterized in that: A filter (109) is also connected in series to the water supply pipe (107). The filter (109) is arranged on the water supply pipe (107) between the water supply pump (108) and the water tank (104).

6. A double-hole complementary construction ventilation system according to claim 4, characterized in that: A sewage pump (1010) is provided at the bottom of the vehicle frame (101), and the sewage pump (1010) is connected to the sedimentation chamber (1044) through a sewage pipe (1011).

7. A control method for a double-hole complementary construction ventilation system according to any one of claims 1 to 6, characterized in that: The control method comprises the following steps: S1, determining the construction status of the first tunnel (1) and the second tunnel (2); S2, regulating the power of the first pressure-type fan (4) according to the construction status of the first tunnel (1) and the second tunnel (2); regulating the power of the second pressure-type fan (5); S3. According to the construction status of the first tunnel (1) and the second tunnel (2), the first wet dust removal equipment (6) is turned on or off; and the second wet dust removal equipment (7) is turned on or off.

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