Underground ultra-long-distance tunneling ventilation device

Abstract

The utility model discloses an underground extra-long-distance tunneling ventilation device which comprises a roadway and further comprises a first-stage machine station draught fan installed at the starting end of the roadway, a plurality of avoiding chambers are formed in the roadway and sequentially arranged on the side wall of the roadway, the first-stage machine station draught fan is located at the upstream position, and sealing walls are fixedly connected into the avoiding chambers. A relay fan and a first hard air pipe are installed on the airtight wall, the air outlet end of the first hard air pipe extends into the evasion chamber, a second hard air pipe is installed on an air outlet of the relay fan, the air inlet end of the first hard air pipe is communicated with a soft air pipe, the soft air pipe is located outside the evasion chamber, the first-stage machine station fan is communicated with the adjacent soft air pipe, and the second-stage machine station fan is communicated with the adjacent soft air pipe. And the other soft air pipes are communicated with the adjacent upstream hard air pipes II. By adopting a segmentation method and a semi-closed-loop multi-stage machine station relay mode, the ventilation resistance in the ultra-long-distance tunneling process is reduced, the working efficiency of a fan is improved, the air leakage of an air duct is reduced, and the environmental quality of a tunneling working face and an air return section is improved.

Description

Technical Field

[0001] This utility model relates to the field of mine ventilation technology, and in particular to a ventilation device for ultra-long-distance underground tunneling. Background Technology

[0002] Currently, long-distance tunneling ventilation is commonly achieved using high-pressure fans in conjunction with large ventilation ducts. Due to size limitations, high-pressure fans typically employ counter-rotating fans, or even multiple counter-rotating fans connected in series, to achieve high pressure. This method results in high airflow pressure within the ventilation duct, significant air leakage, and a relatively small volume of air reaching the tunneling face. This leads to problems such as prolonged blasting smoke exhaust time, high temperatures at the tunneling face, high local fan energy consumption, and low fan efficiency. It is difficult to meet the actual airflow requirements during ultra-long-distance tunneling, and the environmental parameters at the tunneling face also fail to meet regulatory requirements. Utility Model Content

[0003] The purpose of this invention is to provide a ventilation device for ultra-long-distance underground tunneling, in order to solve the problems of long exhaust time for blasting fumes, high working face temperature, and low fan efficiency caused by ultra-high resistance in ventilation during ultra-long-distance tunneling.

[0004] To achieve the above objectives, this utility model provides the following solution: This utility model provides a ventilation device for ultra-long-distance underground tunneling, including a roadway, and further comprising:

[0005] A first-stage pumping station fan is installed at the starting end of the tunnel. Several refuge chambers are provided within the tunnel, and these chambers are sequentially arranged on the sidewalls of the tunnel. The first-stage pumping station fan is located upstream. A sealed wall is fixedly connected to each refuge chamber. A relay fan and a rigid air duct are installed on the sealed wall. The outlet end of the rigid air duct extends into the refuge chamber. A second rigid air duct is installed at the outlet of the relay fan. The inlet end of the rigid air duct is connected to a flexible air duct located outside the refuge chamber. The first-stage pumping station fan is connected to the adjacent flexible air duct, and the remaining flexible air ducts are connected to the adjacent upstream rigid air duct.

[0006] Preferably, the diameters of the rigid duct one and the rigid duct two are 900mm, and the diameter of the flexible duct is 000mm.

[0007] Preferably, the rigid duct is L-shaped.

[0008] Preferably, the sealed wall has an entrance / exit.

[0009] Preferably, the sealed wall has an air duct opening and a fan opening, the rigid air duct is fixedly connected to the air duct opening, and the relay fan is installed in the fan opening.

[0010] This invention discloses the following technical effects: In this device, fresh air flows through the first-stage station fan into the connected flexible duct, then through a rigid duct into the refuge chamber. A relay fan then delivers the fresh air through a rigid duct to the downstream flexible duct. Once the fresh air reaches the downstream refuge chamber, it is further transported downstream by the relay fan, thus circulating the fresh air and achieving ultra-long-distance air supply. This invention employs a segmented method and a semi-closed-loop multi-stage station relay mode, reducing ventilation resistance during ultra-long-distance tunneling, improving fan efficiency, reducing air leakage in the ventilation duct, and improving the environmental quality of the tunneling face and return air section. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the underground ultra-long-distance tunneling ventilation device of this utility model;

[0013] Figure 2 This is a schematic diagram of the shelter chamber structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the sealed wall structure of this utility model;

[0015] Among them, 1. tunnel; 2. primary station fan; 3. refuge chamber; 4. sealed wall; 5. relay fan; 6. rigid air duct one; 7. rigid air duct two; 8. flexible air duct; 9. entrance and exit; 10. air duct outlet; 11. fan outlet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Reference Figure 1-3This utility model provides a ventilation device for ultra-long-distance underground tunneling, including a tunnel 1, and further comprising:

[0019] A primary station fan 2 is installed at the starting end of tunnel 1. Several refuge chambers 3 are set up in tunnel 1, and the refuge chambers 3 are arranged sequentially on the side wall of tunnel 1. The primary station fan 2 is located upstream. A sealed wall 4 is fixedly connected inside the refuge chamber 3. A relay fan 5 and a rigid air duct 6 are installed on the sealed wall 4. The air outlet of the rigid air duct 6 extends into the refuge chamber 3. A rigid air duct 7 is installed on the air outlet of the relay fan 5. The air inlet of the rigid air duct 6 is connected to a flexible air duct 8. The flexible air duct 8 is located outside the refuge chamber 3. The primary station fan 2 is connected to the adjacent flexible air duct 8, and the remaining flexible air ducts 8 are connected to the adjacent upstream rigid air duct 7.

[0020] In this device, fresh air flows through the first-stage station fan 2 into the connected flexible duct 8, then through the rigid duct 6 into the refuge chamber 3. The relay fan 5 sends the fresh air through the rigid duct 7 to the downstream flexible duct 8. When the fresh air reaches the downstream refuge chamber 3, it is continued to be transported downstream by the relay fan 5. This cycle of supplying fresh air achieves ultra-long-distance air supply. The air volume of the relay fan 5 decreases by 5-10% in each subsequent cycle.

[0021] Further optimization of the scheme: rigid duct 1 (6) and rigid duct 2 (7) have a diameter of 900mm, and flexible duct 8 has a diameter of 1000mm.

[0022] Further optimization of the design resulted in the rigid air duct No. 6 being L-shaped.

[0023] The design was further optimized by adding an entrance / exit 9 to the sealed wall 4.

[0024] The scheme is further optimized by opening a duct outlet 10 and a fan outlet 11 on the sealed wall 4. A rigid air duct 6 is fixedly connected inside the duct outlet 10, and a relay fan 5 is installed inside the fan outlet 11.

[0025] A rigid air duct 6 with a diameter of 900mm is arranged close to the roadway wall. The center elevation of the air duct opening 10 on the sealed wall is 2000mm away from the bottom plate of the refuge chamber 3. The relay fan 5 is installed inside the fan opening 11. The fan opening 11 and the air duct opening 10 are installed at the same elevation, and the horizontal distance between their centers is 2500mm. The entrance 9 is 1000mm wide and 1500mm high, which is for people to pass through and is used for ventilation inspection, personnel avoidance and excess fresh air outlet.

[0026] In this device, the refuge chambers 3 at appropriate intervals serve as airflow transfer points, realizing a semi-closed-loop multi-stage relay mode. Each station overcomes the ventilation resistance within its own station, thereby decomposing the high resistance during ultra-long-distance tunneling. To ensure fresh airflow at the air intakes of the relay stations, the airflow matching relationship between each station is designed to ensure that the airflow of the previous station is 5%-10% higher than that of the next station. Excess airflow is discharged from the refuge chambers and returned to the tunneling roadway. This increases the return air velocity of the tunneling roadway, and the addition of fresh airflow also improves the environmental quality of the return air section of the tunneling roadway.

[0027] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A ventilation device for ultra-long-distance underground tunneling, comprising a roadway (1), characterized in that, Also includes: A first-stage station fan (2) is installed at the starting end of the tunnel (1). Several refuge chambers (3) are provided inside the tunnel (1). The refuge chambers (3) are arranged sequentially on the side wall of the tunnel (1). The first-stage station fan (2) is located upstream. A sealed wall (4) is fixedly connected inside each refuge chamber (3). A relay fan (5) and a rigid air duct (6) are installed on the sealed wall (4). The air outlet of the 6) extends into the refuge chamber (3). A rigid air duct (7) is installed on the air outlet of the relay fan (5). The air inlet of the rigid air duct (6) is connected to a flexible air duct (8). The flexible air duct (8) is located outside the refuge chamber (3). The first-stage station fan (2) is connected to the adjacent flexible air duct (8). The remaining flexible air ducts (8) are connected to the adjacent upstream rigid air duct (7).

2. The ventilation device for ultra-long-distance underground tunneling according to claim 1, characterized in that: The diameter of the rigid air duct one (6) and the rigid air duct two (7) is 900mm, and the diameter of the flexible air duct (8) is 1000mm.

3. The ventilation device for ultra-long-distance underground tunneling according to claim 1, characterized in that: The rigid duct (6) is L-shaped.

4. The ventilation device for ultra-long-distance underground tunneling according to claim 1, characterized in that: An entrance (9) is provided on the sealed wall (4).

5. The ventilation device for ultra-long-distance underground tunneling according to claim 1, characterized in that: The sealed wall (4) is provided with a duct opening (10) and a fan opening (11). The rigid air duct (6) is fixedly connected inside the duct opening (10), and the relay fan (5) is installed inside the fan opening (11).

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