A ventilation and dust suppression system for underground mine roadway excavation

Abstract

The application relates to a ventilation and dust suppression system for underground mine roadway tunneling, and relates to the technical field of ventilation and dust suppression, which comprises a tunneling trolley body, a wind cylinder assembly, an intelligent spraying module and a dust removal unit. The wind cylinder assembly is dynamically extended along with the tunneling face by the telescopic wind cylinder body and the connecting flange, the defects that the traditional wind cylinder cannot follow are solved, the dust concentration sensor and the humidity sensor in the intelligent spraying module monitor the environmental data in real time, the small PLC controller intelligently controls the micro water pump, the inclined low-pressure spray head accurately reduces dust, the servo motor drives the first linkage rod and the second linkage rod to swing the transition pipe to expand the coverage range, the dust reduction efficiency is improved without excessive humidification, the dust removal unit adopts a three-stage filtering structure, dust-containing air enters the filtering box through the dust suction corrugated pipe, is purified in stages through the first-stage rough filter plate, the second-stage medium filter plate and the third-stage fine filter plate, and the dust suction corrugated pipe is flexibly adjusted in position by the electric push rod.

Description

Technical Field

[0001] This application relates to the field of ventilation and dust suppression technology, and in particular to a ventilation and dust suppression system for underground mine tunnel excavation. Background Technology

[0002] During the excavation of underground mine tunnels, a large amount of dust is generated due to blasting, mechanical crushing, ore transportation and other operations, which seriously endangers the health of workers and reduces work efficiency.

[0003] Currently, dust concentration is mainly controlled both domestically and internationally through methods such as local ventilation fans combined with forced ventilation ducts, spray dust suppression, and wet drilling. In recent years, with the improvement of environmental protection standards, high-efficiency dust removal equipment such as dry filter dust collectors and electrostatic precipitators have been gradually applied underground. However, due to problems such as large size, high energy consumption, and complex maintenance, they have not yet been widely used in tunneling faces. In order to further improve dust removal efficiency, a ventilation and dust suppression system for underground mine roadway tunneling is proposed. Utility Model Content

[0004] The purpose of this application is to provide a ventilation and dust suppression system for underground mine roadway excavation, which effectively improves dust removal efficiency and solves the problems mentioned in the background art by cooperating with a dust removal unit, a ventilation duct assembly and an intelligent spray module.

[0005] This application provides a ventilation and dust suppression system for underground mine roadway excavation, which adopts the following technical solution: A ventilation and dust suppression system for underground mine roadway excavation includes a tunneling trolley body, a ventilation duct assembly, an intelligent spray module, and a dust removal unit. The intelligent spray module includes two dust concentration sensors and two humidity sensors installed on the outer surface of the tunneling trolley body. The top of the tunneling trolley body is fixedly connected to a liquid storage tank. A small PLC controller electrically connected to the dust concentration sensors and humidity sensors is installed on the outer surface of the liquid storage tank. A micro water pump is installed on one side of the liquid storage tank. The output end of the micro water pump is connected to a flexible hose. The output end of the flexible hose is connected to a transition pipe. One end of the transition pipe is hinged to the top of the tunneling trolley body, and the other end of the transition pipe is equipped with an angled low-pressure nozzle.

[0006] A servo motor is fixedly connected to the top of the tunneling trolley body. A first linkage rod is fixedly connected to the output end of the servo motor. A second linkage rod is installed at one end of the first linkage rod. The other end of the second linkage rod is installed at the top of the transition pipe. The dust removal unit includes a filter box fixedly connected to one side of the tunneling trolley body. The filter box contains a primary coarse filter plate, a secondary medium filter plate, and a tertiary fine filter plate. By adopting the above technical solution, the dust concentration sensor and humidity sensor can detect the dust concentration and ambient humidity at the tunnel face in real time and transmit the signals to the small PLC controller. The small PLC controller controls the start and stop of the micro water pump according to the detection data. When the dust concentration exceeds the standard and the humidity is suitable, the micro water pump delivers the liquid in the storage tank to the inclined low-pressure nozzle through the hose and transition pipe to achieve targeted dust suppression, avoiding the problem of excessive humidification of the rock mass in existing spray dust suppression. At the same time, it works in conjunction with the subsequent dust removal unit to further improve the dust control effect. In addition, when the servo motor starts, it can drive the transition pipe to swing back and forth through the first and second linkage rods, thereby expanding the spray range of the inclined low-pressure nozzle and further optimizing the dust suppression effect. Finally, the remaining dust-laden air can be sucked in by the dust removal unit, filtered, and then discharged as clean air to complete the cycle.

[0007] Preferably, the ventilation duct assembly includes a telescopic ventilation duct body installed on the other side of the tunneling trolley body, and a connecting flange is fixedly connected to one end of the telescopic ventilation duct body.

[0008] By adopting the above technical solution, the length of the telescopic ventilation duct body can be adjusted as the tunnel face advances, and the connecting flange facilitates the quick splicing of ventilation ducts. This solves the defects of existing ventilation ducts that cannot flexibly follow the tunneling progress and have a fixed ventilation range, ensuring that fresh air can be continuously and efficiently delivered to the tunnel face, and providing a stable airflow environment for dust removal operations.

[0009] Preferably, the two dust concentration sensors and humidity sensors are symmetrically distributed on both sides of the tunneling trolley body, and the input end of the micro water pump is located inside the liquid storage tank.

[0010] By adopting the above technical solution, the symmetrically distributed dust concentration sensor and humidity sensor can comprehensively detect the dust and humidity status on both sides of the tunnel face, avoiding the judgment deviation caused by the limited detection range of a single sensor; the micro water pump input end is located inside the liquid storage tank, which can stably extract liquid, ensure the continuity of spray dust suppression, and improve the reliability of system detection and operation.

[0011] Preferably, a water supply pipe and a drain pipe are installed on the other side of the liquid storage tank. The output end of the water supply pipe is connected to the inside of the liquid storage tank, and the input end of the drain pipe is connected to the inside of the liquid storage tank.

[0012] By adopting the above technical solution, the water supply pipe can conveniently replenish the dust-suppressing liquid to the storage tank, avoiding the tedious manual handling of the liquid replenishment; the drain pipe can promptly discharge residual liquid or impurities in the storage tank, facilitating cleaning and maintenance, solving the problems of difficult liquid replenishment and inconvenient cleaning of existing liquid storage devices, and improving the practicality of the system.

[0013] Preferably, the top of the filter box is equipped with a removable cover.

[0014] By adopting the above technical solution, the detachable cover makes it easy to quickly open the filter box, facilitating the inspection, replacement, or cleaning of the internal primary coarse filter plate, secondary medium filter plate, and tertiary fine filter plate. This overcomes the shortcomings of existing dust collector filter media maintenance being complex, time-consuming, and labor-intensive, and reduces maintenance costs.

[0015] Preferably, a centrifugal fan is installed at one end of the filter box, and a dust-collecting corrugated pipe is connected to the other end of the filter box.

[0016] By adopting the above technical solution, the centrifugal fan can create negative pressure in the filter box when it is working, and the dust collection corrugated pipe can be flexibly extended to the vicinity of the dust generation point, so as to efficiently draw dust-laden air into the filter box for treatment. This solves the problem of low dust collection efficiency caused by the fixed dust collection range and the distance from the dust generation point of the existing dust collector, and enhances the dust collection effect.

[0017] Preferably, the three-stage fine filter plate is located on the side closer to the centrifugal fan, the first-stage coarse filter plate is located on the side closer to the dust collection corrugated pipe, and the second-stage medium filter plate is located between the first-stage coarse filter plate and the three-stage fine filter plate.

[0018] By adopting the above technical solution, dust-laden air first passes through a primary coarse filter plate to intercept large dust particles, then through a secondary medium filter plate to filter medium-sized particles, and finally through a tertiary fine filter plate to purify fine dust, forming a graded filtration process. This avoids the problem of excessive burden and easy clogging of a single filter material, and significantly improves dust removal efficiency and filter material lifespan compared to existing non-graded filtration equipment.

[0019] Preferably, an electric push rod is fixedly connected to the outer surface of the filter box, and the output end of the electric push rod is fixedly connected to one end of the dust suction corrugated pipe.

[0020] By adopting the above technical solution, the electric push rod can drive the vacuum bellows to extend and retract, so that the vacuum port can always be close to the dust-generating point, further improving the targeting and efficiency of vacuuming, and ensuring that more dust can be sucked into the filter box for processing in a timely manner.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This ventilation and dust suppression system for underground mine tunnel excavation dynamically extends the duct assembly along the excavation face via a telescopic duct body and connecting flange, overcoming the limitation of traditional ducts that cannot keep up. The intelligent spray module uses dust concentration and humidity sensors to monitor environmental data in real time. A small PLC controller intelligently regulates a micro water pump, precisely reducing dust through oblique low-pressure nozzles. A servo motor drives the first and second linkage rods, causing the transition pipe to swing and expand the coverage area, avoiding over-humidification and improving dust suppression efficiency. The dust removal unit employs a three-stage filtration structure. Dust-laden air enters the filter box through a suction corrugated pipe, undergoing graded purification through a primary coarse filter plate, a secondary medium filter plate, and a tertiary fine filter plate. An electric push rod drives the suction corrugated pipe to flexibly adjust its position. A removable cover facilitates quick filter material replacement. A centrifugal fan ensures efficient airflow circulation. The three modules work together, significantly improving dust removal efficiency compared to traditional systems. The system is more compact, easier to maintain, and particularly suitable for space-constrained underground tunneling operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first overall structure of this application; Figure 2 This is a schematic diagram of the second overall structure of this application; Figure 3 This is a schematic diagram of the first partial side view structure of this application; Figure 4 This is a partial top view of the structure of this application; Figure 5 This is a schematic diagram of the second partial side view structure of this application.

[0023] In the picture: 1. Tunneling trolley body; 2. Ventilation duct assembly; 201. Telescopic ventilation duct body; 202. Connecting flange; 3. Intelligent spray module; 301. Dust concentration sensor; 302. Humidity sensor; 303. Liquid storage tank; 304. Small PLC controller; 305. Micro water pump; 306. Hoses; 307. Transition pipe; 308. Angled low-pressure nozzle; 309. Servo motor; 310. First linkage rod; 311. Second linkage rod; 312. Water supply pipe; 313. Drain pipe; 4. Dust removal unit; 401. Filter box; 402. Box cover; 403. Centrifugal fan; 404. Primary coarse filter plate; 405. Secondary medium filter plate; 406. Tertiary fine filter plate; 407. Dust suction corrugated pipe; 408. Electric push rod. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0025] Example 1: A ventilation and dust suppression system for underground mine roadway excavation, referring to... Figure 1 , Figure 2 and Figure 4 The system includes a tunneling trolley body 1, a ventilation duct assembly 2, an intelligent spray module 3, and a dust removal unit 4. The intelligent spray module 3 includes two dust concentration sensors 301 and two humidity sensors 302 installed on the outer surface of the tunneling trolley body 1. The top of the tunneling trolley body 1 is fixedly connected to a liquid storage tank 303. A small PLC controller 304 electrically connected to the dust concentration sensors 301 and humidity sensors 302 is installed on the outer surface of the liquid storage tank 303. The two dust concentration sensors 301 and humidity sensors 302 are symmetrically distributed on both sides of the tunneling trolley body 1. The symmetrically distributed dust concentration sensors 301 and humidity sensors 302 can comprehensively detect dust concentrations. The dust and humidity conditions on both sides of the tunnel face are monitored to avoid judgment errors caused by the limited detection range of a single sensor. A miniature water pump 305 is installed on one side of the liquid storage tank 303. The output end of the miniature water pump 305 is connected to a hose 306. The input end of the miniature water pump 305 is located inside the liquid storage tank 303. The input end of the miniature water pump 305 is located inside the liquid storage tank 303, which can stably extract liquid, ensure the continuity of spray dust suppression, and improve the reliability of system detection and operation. The output end of the hose 306 is connected to a transition pipe 307. One end of the transition pipe 307 is hinged to the top of the tunneling trolley body 1, and the other end of the transition pipe 307 is equipped with an angled low-pressure nozzle 308.

[0026] Reference Figure 3 , Figure 4 and Figure 5 A servo motor 309 is fixedly connected to the top of the tunneling trolley body 1. A first linkage rod 310 is fixedly connected to the output end of the servo motor 309. A second linkage rod 311 is installed at one end of the first linkage rod 310. The other end of the second linkage rod 311 is installed at the top of the transition pipe 307. A water supply pipe 312 and a drain pipe 313 are installed on the other side of the liquid storage tank 303. The output end of the water supply pipe 312 is connected to the inside of the liquid storage tank 303, and the input end of the drain pipe 313 is connected to the inside of the liquid storage tank 303. The water supply pipe 312 can conveniently replenish the dust-suppressing liquid to the liquid storage tank 303, avoiding the tedious manual handling of liquid replenishment. The drain pipe 313 can timely discharge the residual liquid or impurities in the liquid storage tank 303, which is convenient for cleaning and maintenance. This solves the problems of difficult liquid replenishment and inconvenient cleaning of existing liquid storage devices and improves the practicality of the system.

[0027] Example 2: A ventilation and dust suppression system for underground mine roadway excavation, referring to... Figure 1 , Figure 3 and Figure 5Based on the same concept as Embodiment 1 above, this embodiment proposes a ventilation duct assembly 2 including a telescopic ventilation duct body 201 installed on the other side of the tunneling trolley body 1. One end of the telescopic ventilation duct body 201 is fixedly connected to a connecting flange 202. The length of the telescopic ventilation duct body 201 can be adjusted as the tunneling face advances. The connecting flange 202 facilitates the quick splicing of ventilation ducts, solving the defects of existing ventilation ducts that cannot flexibly follow the tunneling progress and have a fixed ventilation range. This ensures that fresh air can be continuously and efficiently delivered to the tunneling face, providing a stable airflow environment for dust removal operations.

[0028] Reference Figure 2 , Figure 3 and Figure 4 The dust removal unit 4 includes a filter box 401 fixedly connected to one side of the tunneling trolley body 1. The filter box 401 contains a primary coarse filter plate 404, a secondary medium filter plate 405, and a tertiary fine filter plate 406. A detachable cover 402 is installed on the top of the filter box 401, allowing for quick opening of the filter box 401 and facilitating inspection, replacement, or cleaning of the primary coarse filter plate 404, secondary medium filter plate 405, and tertiary fine filter plate 406. This overcomes the limitations of existing dust collectors. The filter media maintenance is complex, time-consuming, and labor-intensive, thus reducing maintenance costs. A centrifugal fan 403 is installed at one end of the filter box 401, and a suction bellows 407 is connected to the other end. When the centrifugal fan 403 is working, it can create negative pressure inside the filter box 401. The suction bellows 407 can flexibly extend to the vicinity of the dust-generating point, efficiently drawing dust-laden air into the filter box 401 for treatment. This solves the problem of low dust collection efficiency caused by the fixed dust collection range and distance from the dust-generating point in existing dust collectors, increasing efficiency. To enhance dust collection, the three-stage fine filter plate 406 is located near the centrifugal fan 403, the first-stage coarse filter plate 404 is located near the suction bellows 407, and the second-stage medium filter plate 405 is located between the first-stage coarse filter plate 404 and the three-stage fine filter plate 406. Dust-laden air first passes through the first-stage coarse filter plate 404 to intercept large dust particles, then the second-stage medium filter plate 405 filters medium-sized particles, and finally the three-stage fine filter plate 406 purifies fine dust, forming a graded filtration process that avoids the burden on a single filter material. Compared to existing non-graded filtration equipment, this device significantly improves dust removal efficiency and filter media lifespan, overcoming the problems of excessive weight and easy clogging. An electric push rod 408 is fixedly connected to the outer surface of the filter box 401. The output end of the electric push rod 408 is fixedly connected to one end of the suction bellows 407. The electric push rod 408 can drive the suction bellows 407 to extend and retract, ensuring that the suction port is always close to the dust-generating point, further enhancing the targeting and efficiency of dust collection, and ensuring that more dust can be sucked into the filter box 401 for processing in a timely manner.

[0029] The implementation principle of this application embodiment is as follows: the tunneling trolley body 1 drives the entire system to advance synchronously with the tunneling face. In the ventilation duct assembly 2, the telescopic ventilation duct body 201 is quickly spliced ​​and extended through the connecting flange 202, continuously and directionally delivering fresh air from outside the tunnel to the tunneling face, forming a stable airflow environment, and providing a foundation for subsequent dust control. At the same time, the intelligent spray module 3 starts to work. The dust concentration sensor 301 and humidity sensor 302 installed on both sides of the tunneling trolley body 1 monitor the dust concentration and ambient humidity of the tunneling face in real time, and transmit the monitoring data. The data is sent to the small PLC controller 304. When the dust concentration exceeds the standard and the ambient humidity is within a suitable range, the small PLC controller 304 starts the micro water pump 305. The micro water pump 305 draws dust-suppressing liquid from the storage tank 303 and delivers it to the transition pipe 307 through the hose 306. Finally, the water mist is sprayed by the inclined low-pressure nozzle 308. At the same time, the servo motor 309 starts and drives the transition pipe 307 to swing back and forth through the first linkage 310 and the second linkage 311, expanding the spraying range of the inclined low-pressure nozzle 308 and achieving the effect of spraying large particles. The initial and efficient capture of dust is achieved, while the water supply pipe 312 on the liquid storage tank 303 can replenish the liquid in a timely manner, and the drain pipe 313 facilitates the discharge of residual liquid or impurities, ensuring the continuous and stable operation of the spray system. Simultaneously with the dust suppression spray, the dust removal unit 4 starts up, and the centrifugal fan 403 creates negative pressure inside the filter box 401. The electric push rod 408 drives the suction bellows 407 to extend and retract, ensuring that the suction port is always close to the dust area not completely captured by the spray, drawing dust-laden air into the filter box 401. After entering the filter box 401, the dust-laden air first passes through the area close to the suction... Large dust particles are intercepted by the primary coarse filter plate 404 on one side of the corrugated dust pipe 407. Medium-sized dust particles are then filtered by the secondary medium filter plate 405 located in the middle. Finally, fine dust is purified by the tertiary fine filter plate 406 located near the centrifugal fan 403. The purified clean air is then discharged by the centrifugal fan 403, completing the entire dust control cycle. The removable cover 402 on the top of the filter box 401 allows for periodic opening to inspect, clean, or replace the primary coarse filter plate 404, the secondary medium filter plate 405, and the tertiary fine filter plate 406, ensuring stable filtration efficiency. Through the coordinated operation of all components, the system achieves a complete process from ventilation and pre-dust suppression via spraying to deep filtration and dust removal, effectively controlling dust in the tunneling face.

[0030] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A ventilation and dust suppression system for underground mine roadway excavation, comprising a tunneling trolley body (1), a ventilation duct assembly (2), an intelligent spray module (3), and a dust removal unit (4), characterized in that: The intelligent spray module (3) includes two dust concentration sensors (301) and two humidity sensors (302) installed on the outer surface of the tunneling trolley body (1). The top of the tunneling trolley body (1) is fixedly connected to the liquid storage tank (303). A small PLC controller (304) electrically connected to the dust concentration sensors (301) and humidity sensors (302) is installed on the outer surface of the liquid storage tank (303). A micro water pump (305) is installed on one side of the liquid storage tank (303). The output end of the micro water pump (305) is connected to a hose (306). The output end of the hose (306) is connected to a transition pipe (307). One end of the transition pipe (307) is hinged to the top of the tunneling trolley body (1). The other end of the transition pipe (307) is equipped with an oblique low-pressure nozzle (308). A servo motor (309) is fixedly connected to the top of the tunneling trolley body (1). A first linkage rod (310) is fixedly connected to the output end of the servo motor (309). A second linkage rod (311) is installed at one end of the first linkage rod (310). The other end of the second linkage rod (311) is installed at the top of the transition pipe (307). The dust removal unit (4) includes a filter box (401) fixedly connected to one side of the tunneling trolley body (1). A primary coarse filter plate (404), a secondary medium filter plate (405), and a tertiary fine filter plate (406) are installed inside the filter box (401).

2. The ventilation and dust suppression system for underground mine roadway excavation according to claim 1, characterized in that: The ventilation duct assembly (2) includes a telescopic ventilation duct body (201) installed on the other side of the tunneling trolley body (1), and a connecting flange (202) is fixedly connected to one end of the telescopic ventilation duct body (201).

3. The ventilation and dust suppression system for underground mine roadway excavation according to claim 1, characterized in that: The two dust concentration sensors (301) and humidity sensors (302) are symmetrically distributed on both sides of the tunneling trolley body (1), and the input end of the micro water pump (305) is located inside the liquid storage tank (303).

4. The ventilation and dust suppression system for underground mine roadway excavation according to claim 1, characterized in that: A water supply pipe (312) and a drain pipe (313) are installed on the other side of the liquid storage tank (303). The output end of the water supply pipe (312) is connected to the inside of the liquid storage tank (303), and the input end of the drain pipe (313) is connected to the inside of the liquid storage tank (303).

5. A ventilation and dust suppression system for underground mine roadway excavation according to claim 1, characterized in that: The filter box (401) is equipped with a removable cover (402) on top.

6. A ventilation and dust suppression system for underground mine roadway excavation according to claim 1, characterized in that: A centrifugal fan (403) is installed at one end of the filter box (401), and a dust suction corrugated pipe (407) is connected to the other end of the filter box (401).

7. A ventilation and dust suppression system for underground mine roadway excavation according to claim 6, characterized in that: The three-stage fine filter plate (406) is located on the side closer to the centrifugal fan (403), the first-stage coarse filter plate (404) is located on the side closer to the dust collection corrugated pipe (407), and the second-stage medium filter plate (405) is located between the first-stage coarse filter plate (404) and the three-stage fine filter plate (406).

8. A ventilation and dust suppression system for underground mine roadway excavation according to claim 6, characterized in that: An electric push rod (408) is fixedly connected to the outer surface of the filter box (401), and the output end of the electric push rod (408) is fixedly connected to one end of the dust suction corrugated pipe (407).

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