A wind chamber type construction ventilation system for double-hole tunnels with multiple working faces

Abstract

The present invention relates to the technical field of tunnel construction, and specifically, discloses a wind silo type construction ventilation system for a double-hole tunnel with multiple working faces. The wind silo includes a wind silo located between two main tunnel sections for supplying air volume to each tunnel, and a fresh air inlet and an exhaust outlet are provided on the wind silo. The fresh air inlet is connected to an inclined shaft section air duct located in an inclined shaft section tunnel, and the exhaust outlet is connected to a main tunnel section air duct located in a main tunnel section tunnel. An inlet air supply fan for providing fresh air supply is provided at the air inlet of the inclined shaft section air duct, and an inlet wind speed sensor for detecting the air inlet of the inclined shaft section air duct is also provided at the air inlet of the inclined shaft section air duct, and an outlet wind speed sensor for detecting the air outlet of the main tunnel section air duct away from the wind silo is provided, and a relay fan for increasing the wind speed in the main tunnel section air duct is provided at the exhaust outlet in the wind silo, and the outlet of the main tunnel section air duct is for each working face. The system can meet the ventilation needs of multiple working faces and is suitable for complex tunnel construction environments.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a wind silo type construction ventilation system for a multi-working face double-hole tunnel. Background Art

[0002] During tunnel construction, pollutants such as dust, carbon monoxide, sulfide and toxic and harmful gases will inevitably be produced. In addition, tunnels are closed. If all kinds of pollutants and toxic and harmful gases are not discharged out of the tunnel as soon as possible, it will not only affect the normal progress of construction, but also endanger the physical health of relevant personnel.

[0003] At present, the commonly used tunnel construction ventilation method is mainly duct type. However, for multi-working face tunnels, duct ventilation will have large angle bends in the "T-shaped" or "B-shaped" structure, which will greatly increase the local pressure loss and significantly reduce the ventilation effect. Summary of the invention

[0004] The invention provides a wind bin type construction ventilation system for a multi-working face double-hole tunnel, which can overcome certain or some defects of the prior art.

[0005] According to the present invention, a multi-working face double-tunnel wind bin type construction ventilation system includes a wind bin arranged between two main tunnel sections for supplying air volume to each tunnel, the wind bin is provided with a fresh air inlet and an exhaust outlet, the fresh air inlet is connected to an inclined shaft section air duct arranged in the inclined shaft section tunnel, the exhaust outlet is connected to the main tunnel section air duct arranged in the main tunnel section tunnel, an inlet air supply fan for providing fresh air supply is provided at the air inlet of the inclined shaft section air duct, an inlet wind speed sensor for detecting the air inlet volume of the inclined shaft section air duct is also provided at the air inlet of the inclined shaft section air duct, an outlet wind speed sensor for detecting the air outlet volume of the main tunnel section air duct away from the wind bin is provided, a relay fan for increasing the wind speed in the main tunnel section air duct is provided at the exhaust outlet in the wind bin, and the outlet of the main tunnel section air duct is for each working face.

[0006] Through the present invention, the design of the wind bin can more efficiently provide air volume for the two main tunnel sections, ensure air circulation in the tunnel, effectively remove harmful gases and dust, and improve ventilation efficiency; the wind bin is provided with fresh air inlets and exhaust outlets, and the air volume can be adjusted according to actual needs, so as to realize independent control of the air volume of each tunnel and flexibly adjust the air volume; the relay fan arranged at the exhaust outlet in the wind bin can increase the wind speed in the air duct of the main tunnel section, further improve the ventilation conditions in the tunnel, and enhance the ventilation effect; the inlet air supply fan at the air inlet of the inclined shaft section air duct can ensure that sufficient fresh air is provided to the tunnel; by respectively arranging an inlet wind speed sensor and an outlet wind speed sensor at the air inlet of the inclined shaft section air duct and the exhaust outlet of the main tunnel section air duct, the wind speed in the air duct can be monitored in real time to ensure the stable operation of the ventilation system; the system can meet the ventilation needs of multiple working surfaces and is suitable for complex tunnel construction environments.

[0007] As a preferred option, the air volume at the air inlet of the inclined shaft section air duct is , Inlet air supply fan power , which meets the following conditions: Q ≥ Q1 + Q2 + Q3 + Q4, where Q1, Q2, Q3, and Q4 are the theoretical real-time air volume requirements of each working surface, is the first proportionality constant including air density, D is the diameter of the air inlet, is the second proportional constant determined by the inlet supply fan, It is the wind speed detected by the inlet wind speed sensor.

[0008] Through the present invention, the air volume at the air inlet of the inclined shaft section air duct is obtained by calculation, and accurate air volume control can be achieved to ensure that the air volume meets actual needs; the condition Q ≥ Q1 + Q2 + Q3 + Q4 ensures that the total air volume Q provided by the inclined shaft section air duct is at least equal to the sum of the theoretical real-time air volume requirements of each working face, which ensures that each working face can obtain sufficient air volume to meet the ventilation needs.

[0009] As a preferred option, the air volume in the main tunnel section air duct , power of each relay fan It satisfies the following conditions: S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4. is the diameter of the exhaust port in the wind silo corresponding to each relay fan, S1, S2, S3, S4 are the actual air volume of each working surface, is the second proportionality constant, is the fourth proportional constant determined by the relay fan, It is the wind speed detected by the outlet wind speed sensor.

[0010] Through the present invention, the power of each relay fan can be adjusted to achieve personalized air volume supply at the exhaust port in the wind bin, and each relay fan can be adjusted by optimizing its corresponding parameters. and k 3 to improve work efficiency to cope with different construction situations.

[0011] As a preferred option, the theoretical real-time required air volume Q1, Q2, Q3, Q4 of each working face is determined according to the number of people in the tunnel and the equipment and machinery. , is the theoretical real-time air volume required for each working surface. is the number of people in each work surface, is the air volume required for each worker, is the number of equipment and machinery in each working surface, It is the air volume required by each equipment machinery.

[0012] Through the present invention, the formula is calculated based on actual parameters (number of people and number of equipment and machinery), so that the determination of the required air volume is more scientific and reasonable, and can ensure that the air quality of the working surface meets safety standards; the formula can be adjusted in real time according to changes in the actual working surface (increase or decrease in the number of people or equipment and machinery) to adapt to the needs of different working environments.

[0013] Preferably, when Q≤Q1+Q2+Q3+Q4, the inlet air supply fan power is increased until the air output Q increases to satisfy Q≥Q1+Q2+Q3+Q4.

[0014] According to the present invention, when the total air supply volume Q is less than the sum of the air volumes required by each working surface, and The ventilation demand can be met by increasing the power of the inlet air supply fan, ensuring that all working surfaces can obtain their theoretical real-time required air volume, and the inlet wind speed sensor can be used to monitor the inlet wind speed. , and because , the air supply volume Q is further obtained and compared with the demand volume, and the power of the inlet air supply fan can be dynamically adjusted to meet the real-time changing ventilation needs.

[0015] Preferably, a partition slot is provided at the air outlet in the wind bin, and a wind bin partition that can slide on the partition slot is provided on the partition slot.

[0016] Through the present invention, the sliding wind bin partition can flexibly adjust the size of the exhaust port, thereby controlling the air volume and wind speed in the wind bin to adapt to different ventilation needs and flexibly adjust the air volume; according to the needs of the actual working environment, the ventilation effect is optimized and the ventilation efficiency is improved by changing the position of the partition.

[0017] As a preference, the air bin partition is used to move in the partition slot to adjust the partition coverage ratio U. The partition coverage ratio U is the ratio of the exhaust port area covered by the air bin partition to the exhaust port area. When the partition coverage ratio U is 1, the exhaust port is completely closed, and the air volume in the positive tunnel section air duct after the change .

[0018] By adjusting the partition coverage ratio U, the air volume in the air duct can be accurately controlled. , to meet the ventilation needs under different working conditions; the setting of the wind bin partition can be used as the switch of the current exhaust vent. When the partition coverage U is the ratio of the exhaust vent area covered by the wind bin partition to the exhaust vent area, which is 1, the exhaust vent is completely closed to achieve the closure of the current exhaust vent; when the air volume needs to be reduced, by increasing the partition coverage U, the fan power consumption can be reduced more, thereby saving energy.

[0019] Preferably, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partitions are adjusted to reduce the coverage rate U until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

[0020] Through the present invention, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, that is, the duct ventilation will have a large angle bend at the "T-shaped" or "B-shaped" structure, resulting in increased local pressure loss and significantly reduced ventilation effect. If the loss is small, in this case, the wind bin partition is adjusted to reduce the impact of the "T-shaped" or "B-shaped" structure, so that S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 can be achieved.

[0021] As a preferred method, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, adjust the wind silo partition to reduce the coverage rate U to 0. If S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are not satisfied, increase the power of the relay fan synchronously. , until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

[0022] Through the present invention, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partition is adjusted to reduce the coverage rate U to 0, and S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are not satisfied, it means that the duct ventilation will have a large angle bending at the "T-shaped" or "B-shaped" structure, resulting in increased local pressure loss, significantly reduced ventilation effect, and a large loss. The adjustment range of Q brought by adjusting the wind bin partition does not satisfy S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4. At this time, the power of the relay fan is increased to meet S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4, which can reduce the increase in the power of the relay fan and save costs.

[0023] Preferably, the wind bin is a semi-sealed rectangular parallelepiped made of Q690D steel.

[0024] Through the present invention, the wind bin made of Q690D steel provides higher structural strength and stability, and can withstand internal wind pressure and external environmental pressure; the semi-sealed rectangular shape is conducive to achieving a good sealing effect, reducing air leakage, and ensuring ventilation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the wind chamber type construction ventilation system for a double-hole tunnel with multiple working faces; Figure 2 This is a schematic diagram of the wind bin partition. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0027] Example 1 like Figure 1-2As shown, this embodiment provides a multi-working face double-tunnel wind silo type construction ventilation system, which includes a wind silo 110 arranged between two main tunnel sections 100 for supplying air volume to each tunnel, and the wind silo 110 is provided with a fresh air inlet 120 and an exhaust air outlet 130, the fresh air inlet 120 is connected to an inclined shaft section air duct 141 arranged in an inclined shaft section tunnel 140, and the exhaust air outlet 130 is connected to the main shaft section air duct 101 arranged in the main tunnel section tunnel 100, and an air inlet 152 of the inclined shaft section air duct 141 is provided with a fresh air supply port 152 for supplying fresh air. An inlet air supply fan 150 is provided, and an inlet wind speed sensor 151 for detecting the air intake volume of the inclined shaft section air duct 141 is also provided at the air inlet 152 of the inclined shaft section air duct 141, and an outlet wind speed sensor 121 for detecting the air outlet volume of the main tunnel section air duct 101 is provided at the exhaust port 130 away from the wind bin 110, and a relay fan 160 for increasing the wind speed in the main tunnel section air duct 101 is provided at the exhaust port 130 in the wind bin 110, and the outlet of the main tunnel section air duct 101 is each working surface 170.

[0028] Through this embodiment, the design of the wind bin 110 can more efficiently provide air volume for the two main tunnel sections 100, ensure air circulation in the tunnel, effectively remove harmful gases and dust, and improve ventilation efficiency; the wind bin 110 is provided with a fresh air inlet 120 and an exhaust outlet 130, and the air volume can be adjusted according to actual needs, so as to realize independent control of the air volume of each tunnel and flexibly adjust the air volume; the relay fan 160 arranged at the exhaust outlet 130 in the wind bin 110 can increase the wind speed in the main tunnel section air duct 101, further improving the ventilation in the tunnel. Wind conditions can enhance ventilation effect; the inlet air supply fan 150 at the air inlet 152 of the inclined shaft section air duct 141 can ensure that sufficient fresh air is provided to the tunnel; by respectively arranging the inlet wind speed sensor 151 and the outlet wind speed sensor 121 at the air inlet 152 of the inclined shaft section air duct 141 and the air outlet 130 of the main tunnel section air duct 101, the wind speed in the air duct can be monitored in real time to ensure the stable operation of the ventilation system; the system can meet the ventilation needs of multiple working faces 170 and is suitable for complex tunnel construction environments.

[0029] In this embodiment, the air volume at the air inlet 152 of the inclined shaft section air duct 141 is , inlet air supply fan 150 power , which satisfies the following conditions: Q ≥ Q1 + Q2 + Q3 + Q4, where Q1, Q2, Q3, and Q4 are the theoretical real-time required air volumes of each working surface 170, is a first proportionality constant including air density, D is the diameter of the air inlet 152, is a second proportional constant determined by the inlet air supply fan 150, It is the wind speed detected by the inlet wind speed sensor 151.

[0030] Through this embodiment, the air volume at the air inlet 152 of the inclined shaft section air duct 141 is obtained by calculation, which can achieve precise air volume control and ensure that the air volume meets actual needs; the condition Q ≥ Q1 + Q2 + Q3 + Q4 ensures that the total air volume Q provided by the inclined shaft section air duct 141 is at least equal to the sum of the theoretical real-time air volume requirements of each working face 170, which ensures that each working face 170 can obtain sufficient air volume to meet ventilation needs.

[0031] In this embodiment, the air volume in the main tunnel section air duct 101 is , each relay fan 160 power It satisfies the following conditions: S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4. is the diameter of the exhaust port 130 in the wind bin 110 corresponding to each relay fan 160, S1, S2, S3, S4 are the actual air volume of each working surface 170, is the second proportionality constant, is a fourth proportional constant determined by the relay fan 160, It is the wind speed detected by the outlet wind speed sensor 121.

[0032] Through this embodiment, the power of each relay fan 160 can be adjusted to achieve personalized air volume supply at the exhaust port 130 in the wind bin 110. Each relay fan 160 can be adjusted by optimizing its corresponding parameters. and k 3 to improve work efficiency to cope with different construction situations.

[0033] In this embodiment, the theoretical real-time required air volume Q1, Q2, Q3, Q4 of each working face 170 is determined according to the number of people in the tunnel and the equipment and machinery. , is the theoretical real-time required air volume of each working surface 170, is the number of people within 170 of each working face, is the air volume required for each worker, is the number of equipment and machinery in each working surface 170, It is the air volume required by each equipment machinery.

[0034] Through this embodiment, the formula is calculated based on actual parameters (number of people and equipment and machinery), so that the determination of the required air volume is more scientific and reasonable, and can ensure that the air quality of the working surface 170 meets the safety standards; the formula can be adjusted in real time according to the actual changes in the working surface 170 (increase or decrease in the number of people or equipment and machinery) to adapt to the needs of different working environments.

[0035] In this embodiment, when Q≤Q1+Q2+Q3+Q4, the power of the inlet air supply fan 150 is increased until the air output Q increases to satisfy Q≥Q1+Q2+Q3+Q4.

[0036] According to this embodiment, when the total air supply volume Q is less than the sum of the air volumes required by each working surface 170, and The ventilation demand can be met by increasing the power of the inlet air supply fan 150, ensuring that all working surfaces 170 can obtain their theoretical real-time required air volume, and the inlet wind speed sensor 151 can be used to monitor the ventilation demand. , and because , the air supply volume Q is further obtained and compared with the demand volume, and the power of the inlet air supply fan 150 can be dynamically adjusted to meet the real-time changing ventilation demand.

[0037] In this embodiment, a partition slot 210 is provided at the air outlet 130 in the air bin 110 , and an air bin partition 220 that can slide on the partition slot 210 is provided on the partition slot 210 .

[0038] Through this embodiment, the sliding wind bin partition 220 can flexibly adjust the size of the exhaust port 130, thereby controlling the air volume and wind speed in the wind bin 110 to adapt to different ventilation needs and flexibly adjust the air volume; according to the needs of the actual working environment, the ventilation effect is optimized and the ventilation efficiency is improved by changing the position of the partition.

[0039] In this embodiment, the air bin partition 220 is used to move in the partition slot 210 to adjust the partition coverage ratio U. The partition coverage ratio U is the ratio of the area of ​​the exhaust port 130 covered by the air bin partition 220 to the area of ​​the exhaust port 130. When the partition coverage ratio U is 1, the exhaust port 130 is completely closed, and the air volume in the positive tunnel section air duct 101 after the change is .

[0040] Through this embodiment, the air volume in the air duct can be accurately controlled by adjusting the partition coverage ratio U , meeting the ventilation needs under different working conditions; the setting of the wind bin partition 220 can be used as the switch of the current exhaust outlet 130. When the partition coverage rate U is the ratio of the area of ​​the exhaust outlet 130 covered by the wind bin partition 220 to the area of ​​the exhaust outlet 130 is 1, the exhaust outlet 130 is completely closed, realizing the closure of the current exhaust outlet 130; when the air volume needs to be reduced, by increasing the partition coverage rate U, the fan power consumption can be reduced more, thereby saving energy.

[0041] In this embodiment, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partition 220 is adjusted to reduce the coverage rate U until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

[0042] Through this embodiment, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, that is, the duct ventilation will have a large angle bend at the "T-shaped" or "B-shaped" structure, resulting in an increase in local pressure loss and a significant reduction in the ventilation effect. If the loss is small, in this case, the wind bin partition 220 is adjusted to reduce the impact of the "T-shaped" or "B-shaped" structure, so as to achieve S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4.

[0043] In this embodiment, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partition 220 is adjusted to reduce the coverage rate U to 0. If S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are not satisfied, the power of the relay fan 160 is increased synchronously. , until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

[0044] Through this embodiment, when Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partition 220 is adjusted to reduce the coverage rate U to 0. If S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are not satisfied, it means that the duct ventilation will have a large angle bend at the "T-shaped" or "B-shaped" structure, resulting in increased local pressure loss, significantly reduced ventilation effect, and a large loss. The adjustment range of Q brought by adjusting the wind bin partition 220 does not satisfy S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4. At this time, the power of the relay fan 160 is increased to meet S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4, which can reduce the increase in power of the relay fan 160 and save costs.

[0045] In this embodiment, the air bin 110 is a semi-sealed rectangular parallelepiped made of Q690D steel.

[0046] Through this embodiment, the wind bin 110 made of Q690D steel provides high structural strength and stability, and can withstand internal wind pressure and external environmental pressure; the semi-sealed rectangular shape is conducive to achieving a good sealing effect, reducing air leakage, and ensuring ventilation efficiency.

[0047] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0048] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A wind silo type construction ventilation system for a multi-working face double-hole tunnel, characterized in that: The invention comprises an air bin (110) disposed between two main tunnel sections (100) for supplying air volume to each tunnel, the air bin (110) being provided with a fresh air inlet (120) and an air exhaust outlet (130), the fresh air inlet (120) being connected to an inclined shaft section air duct (141) disposed in an inclined shaft section tunnel (140), the air exhaust outlet (130) being connected to a main shaft section air duct (101) disposed in a main tunnel section tunnel (100), an inlet air supply fan (150) for providing fresh air supply being provided at an air inlet (152) of the inclined shaft section air duct (141), An inlet wind speed sensor (151) for detecting the air intake volume of the inclined shaft section air duct (141) is also provided at the air inlet (152) of the air duct (141); an outlet wind speed sensor (121) for detecting the air outlet volume of the main tunnel section air duct (101) is provided at the air outlet (130) away from the wind bin (110); a relay fan (160) for increasing the wind speed in the main tunnel section air duct (101) is provided at the air outlet (130) in the wind bin (110); and the outlet of the main tunnel section air duct (101) is each working surface (170).

2. The multi-working face double-hole tunnel wind silo type construction ventilation system according to claim 1 is characterized by: Air volume at the air inlet (152) of the inclined shaft section air duct (141) , inlet air supply fan (150) power , which satisfies the following conditions: Q ≥ Q1 + Q2 + Q3 + Q4, where Q1, Q2, Q3, Q4 are the theoretical real-time required air volumes of each working surface (170), is a first proportionality constant including air density, D is the diameter of the air inlet (152), is a second proportional constant determined by the inlet air supply fan 150, It is the wind speed detected by the inlet wind speed sensor 151.

3. The multi-working face double-hole tunnel wind silo type construction ventilation system according to claim 1 is characterized by: Air volume in the main tunnel section air duct 101 , each relay fan 160 power It satisfies the following conditions: S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4; in is the diameter of the exhaust port (130) in the wind bin (110) corresponding to each relay fan (160), S1, S2, S3, S4 are the actual air volume of each working surface (170), is the second proportionality constant, is a fourth proportional constant determined by the relay fan (160), It is the wind speed detected by the outlet wind speed sensor (121).

4. A multi-working face double-hole tunnel wind silo type construction ventilation system according to claims 2 and 3, characterized in that: The theoretical real-time required air volume Q1, Q2, Q3, Q4 of each working face (170) is determined according to the number of people in the tunnel and the equipment and machinery. , is the theoretical real-time air volume required for each working surface (170), is the number of people in each work surface (170), is the air volume required for each worker, is the number of equipment and machinery in each working surface (170), It is the air volume required for each machine.

5. The multi-working face double-hole tunnel wind silo type construction ventilation system according to claim 2 is characterized by: When Q≤Q1+Q2+Q3+Q4, increase the power of the inlet air supply fan 150 until the air volume Q increases to satisfy Q≥Q1+Q2+Q3+Q4.

6. The multi-working face double-hole tunnel wind silo type construction ventilation system according to claim 1 is characterized by: A partition slot (210) is provided at the air outlet (130) in the air bin (110), and a wind bin partition (220) that can slide on the partition slot (210) is provided on the partition slot (210).

7. The wind silo type construction ventilation system for a multi-working face double-hole tunnel according to claim 6 is characterized by: The air bin partition (220) is used to move in the partition slot (210) to adjust the partition coverage ratio U. The partition coverage ratio U is the ratio of the area of ​​the exhaust port (130) covered by the air bin partition (220) to the area of ​​the exhaust port (130). When the partition coverage ratio U is 1, the exhaust port (130) is completely closed, and the air volume in the positive tunnel section air duct (101) is changed. .

8. A multi-working face double-hole tunnel wind silo type construction ventilation system according to claims 2 and 7, characterized in that: When Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, the wind bin partition (220) is adjusted to reduce the coverage rate U until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

9. The wind silo type construction ventilation system for a multi-working face double-hole tunnel according to claim 8 is characterized in that: When Q≥Q1+Q2+Q3+Q4 and S1≤Q1, S2≤Q2, S3≤Q3, S4≤Q4, adjust the wind bin partition (220) to reduce the coverage rate U to 0. If S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are not satisfied, increase the power of the relay fan (160) simultaneously. , until S1≥Q1, S2≥Q2, S3≥Q3, S4≥Q4 are satisfied.

10. The wind silo type construction ventilation system for a multi-working face double-hole tunnel according to claim 1 is characterized by: The wind chamber (110) is a semi-sealed rectangular parallelepiped made of Q690D steel.

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