Underground roadway ventilation system

Abstract

According to the underground roadway ventilation system, the natural pressure difference between a tunneling roadway and an air return roadway is ingeniously utilized, and dirty air is automatically discharged to the air return roadway. The system comprises key components such as a tunneling roadway, an air inlet roadway, an air return roadway, an air supply part and an air suction pipe. The air inlet roadway conveys fresh air to the tunneling roadway through the air supply part, and the air suction pipe is arranged near the tunneling face to introduce dirty air into the air return roadway. The air return roadway and the tunneling roadway are not located on the same plane, natural ventilation power is formed through pressure difference, and an extra exhaust fan is not needed. In addition, the system can be provided with a detection device to monitor environmental parameters in the roadway in real time and intelligently adjust the air supply state. The ventilation system is simple in structure, energy-saving and environment-friendly, and the energy consumption and the maintenance cost of the ventilation system are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment, and in particular to an underground roadway ventilation system. Background Technology

[0002] In underground engineering projects such as mining and tunneling, ventilation systems are crucial for ensuring a safe working environment and improving production efficiency. Traditional ventilation methods often rely on mechanical equipment such as exhaust fans to force-feed out polluted air (containing dust, harmful gases, etc.) from the tunneling roadway while simultaneously introducing fresh air to maintain air quality. However, as the core equipment of the ventilation system, exhaust fans consume a significant amount of electricity, increasing mining costs and exacerbating energy consumption. Furthermore, exhaust fans operate in harsh environments for extended periods, making them prone to damage and requiring regular maintenance, thus increasing maintenance costs and downtime. Utility Model Content

[0003] The purpose of this utility model is to provide an underground roadway ventilation system to solve the technical problem that the ventilation method used in traditional mining and tunnel excavation relies on exhaust fans as the core equipment of the ventilation system, which consumes a lot of electricity and increases mining costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an underground roadway ventilation system, the underground roadway ventilation system comprising:

[0005] A tunneling roadway, one end of which is a tunneling face;

[0006] An intake airway, one side of which is connected to the tunneling airway;

[0007] The return airway is connected to the tunneling tunnel via a return air shaft. The return airway and the tunneling tunnel are not on the same plane, and the air pressure in the tunneling tunnel is higher than the air pressure in the return airway.

[0008] The air supply unit includes a blower installed in the air intake tunnel and an air supply pipe connected to the output end of the blower, with the end outlet of the air supply pipe located in the tunneling tunnel.

[0009] The suction pipe has one end located near the excavation face and the other end located in the return airway.

[0010] In one embodiment, an open funnel structure is provided at one end of the air intake pipe near the tunnel face.

[0011] In one embodiment, a normally closed door is provided between the tunneling roadway and the return air shaft.

[0012] In one embodiment, a detection device is further included, which is disposed in the tunneling roadway near the tunneling face, and the detection device is electrically connected to the blower in the air supply section.

[0013] In one embodiment, the detection device includes a gas concentration sensor, a wind speed sensor, and a temperature sensor, used to monitor environmental parameters in the tunnel in real time and automatically adjust the operating status of the blower according to the monitoring results to achieve intelligent ventilation control.

[0014] In one embodiment, an air purification device is also installed in the return air tunnel to filter and purify dust and harmful gases in the return air, thereby improving the air quality underground.

[0015] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:

[0016] The underground roadway ventilation system provided in this embodiment utilizes the natural pressure difference between the excavation roadway and the return air roadway to achieve a novel ventilation system that eliminates the need for exhaust fans. This invention fully leverages the natural pressure difference between the roadways as a driving force, eliminating the need for additional mechanical equipment (such as exhaust fans) to drive airflow. This significantly reduces the energy consumption of the ventilation system and carbon emissions, aligning with current green and low-carbon sustainable development concepts. Furthermore, eliminating the need for exhaust fans not only reduces the initial cost of setting up the ventilation system but also lowers subsequent maintenance costs and downtime losses due to equipment failure. Through the design of structures such as suction pipes, the pressure difference can be used more effectively to guide polluted air automatically to the return air roadway, ensuring air quality within the roadway. Finally, by reducing the use of mechanical equipment, the overall reliability of the ventilation system is improved, reducing the risk of ventilation interruptions due to equipment failure and ensuring a safe and stable working environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 A schematic diagram of the structure of the underground roadway ventilation system provided in the embodiment of this utility model.

[0019] The labels for the various figures are as follows:

[0020] 1. Excavation roadway; 2. Intake airway; 3. Return airway; 4. Air supply unit; 5. Suction pipe; 6. Normally closed door; 7. Return air shaft; 8. Detection device; 11. Excavation face; 41. Blower; 42. Air supply pipe; 51. Funnel structure. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "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 simplifying the description, 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.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Please see Figure 1This application provides an underground roadway ventilation system, including a tunneling roadway 1, an intake airway 2, a return airway 3, an air supply unit 4, and an air suction pipe 5. One end of the tunneling roadway 1 is the tunneling face 11. One side of the intake airway 2 is connected to the tunneling roadway 1. The return airway 3 is connected to the tunneling roadway 1 via a return air shaft 7. The return airway 3 and the tunneling roadway 1 are not on the same plane, and the air pressure in the tunneling roadway 1 is higher than the air pressure in the return airway 3. The air supply unit 4 includes a blower 41 installed in the intake airway 2 and an air supply pipe 42 connected to the output end of the blower 41. The end outlet of the air supply pipe 42 is located in the tunneling roadway 1. One end of the air suction pipe 5 is located near the tunneling face 11, and the other end of the air suction pipe 5 is located in the return airway 3.

[0026] When the ventilation system is working, the blower 41 delivers fresh air from the intake airway 2 to the tunneling airway 1 through the air supply pipe 42. At the same time, the polluted air (mixed with inhalable particulate dust and harmful gases such as methane) in the tunneling airway 1 is discharged to the return airway 3 through the suction pipe 5 under the action of pressure difference, ensuring that the workers in the tunneling airway 1 work in a fresh airflow and protecting the workers.

[0027] This embodiment fully utilizes the natural pressure difference between the tunnels as a driving force, eliminating the need for additional mechanical equipment (such as exhaust fans) to drive airflow. This significantly reduces the energy consumption of the ventilation system and carbon emissions, aligning with current green and low-carbon sustainable development principles. Furthermore, by eliminating the exhaust fan, it not only reduces the initial cost of setting up the ventilation system but also lowers subsequent maintenance costs and downtime losses due to equipment failure. Through the design of structures such as the suction duct 5, the pressure difference can be used more effectively to guide polluted air automatically to the return air tunnel 3, ensuring air quality within the tunnels. Finally, by reducing the use of mechanical equipment, the overall reliability of the ventilation system is improved, reducing the risk of ventilation interruptions due to equipment failure and ensuring a safe and stable working environment.

[0028] Specifically, the distance between the suction pipe 5 and the tunneling face 11 is ≤2.4m. The pressure difference between the tunneling roadway 1 and the return airway 3 can be formed using natural wind pressure. The principle of natural wind pressure is due to the difference in temperature and density between the air inside and outside the mine. In the mine, due to geothermal activity, heat dissipation from mechanical equipment, and personnel activities, the temperature of the air underground is usually higher than that of the air at the surface. At the same time, because the underground air contains more water vapor and dust, its density is correspondingly lower. This difference in temperature and density leads to the natural flow of air, forming natural wind pressure.

[0029] In one embodiment, an open funnel structure 51 is provided at one end of the suction pipe 5 near the tunnel face 11. The funnel structure 51 can more effectively capture and gather the polluted air generated at the tunnel face 11, thereby improving suction efficiency.

[0030] In one embodiment, a normally closed door 6 is provided between the excavation roadway 1 and the return air shaft 7. The normally closed door 6 can prevent harmful gases or smoke in the excavation roadway 1 from spreading to the return air roadway 3, thereby improving the safety of the ventilation system.

[0031] In one embodiment, a detection device 8 is also included. The detection device 8 is located in the tunnel 1 near the tunnel face 11 and is electrically connected to the blower 41 in the air supply unit 4. Specifically, the detection device 8 includes a gas concentration sensor, a wind speed sensor, and a temperature sensor. The detection device 8 can monitor environmental parameters in the tunnel 1 in real time, such as gas concentration and wind speed, and automatically adjust the operating status of the blower 41 based on the monitoring results to achieve intelligent ventilation control.

[0032] In one embodiment, an air purification device is also installed in the return air tunnel 3 to filter and purify dust and harmful gases in the return air, thereby improving the underground air quality. Specifically, the air purification device can be a water spray device, a filter device, or other structures.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilation system for underground roadways, characterized in that, The underground tunnel ventilation system includes: A tunneling roadway, one end of which is a tunneling face; An intake airway, one side of which is connected to the tunneling airway; The return airway is connected to the tunneling tunnel via a return air shaft. The return airway and the tunneling tunnel are not on the same plane, and the air pressure in the tunneling tunnel is higher than the air pressure in the return airway. The air supply unit includes a blower installed in the air intake tunnel and an air supply pipe connected to the output end of the blower, with the end outlet of the air supply pipe located in the tunneling tunnel. The suction pipe has one end located near the excavation face and the other end located in the return airway.

2. The underground roadway ventilation system according to claim 1, characterized in that: An open funnel structure is provided at one end of the air intake pipe near the tunnel face.

3. The underground roadway ventilation system according to claim 1, characterized in that: A normally closed door is installed between the tunneling roadway and the return air shaft.

4. The underground roadway ventilation system according to claim 1, characterized in that: It also includes a detection device, which is located in the tunneling roadway near the tunneling face and is electrically connected to the blower in the air supply unit.

5. A ventilation system for underground roadways according to claim 4, characterized in that: The detection device includes a gas concentration sensor, a wind speed sensor, and a temperature sensor, which are used to monitor environmental parameters in the tunnel in real time and automatically adjust the operation of the blower according to the monitoring results to achieve intelligent ventilation control.

6. The underground roadway ventilation system according to claim 1, characterized in that: The return air tunnel is also equipped with an air purification device to filter and purify dust and harmful gases in the return air, thereby improving the air quality underground.

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