A method for rapid coal seam tunnel uncovering in a coal seam geological area

Abstract

This invention discloses a rapid coal uncovering method for gas tunnels in coal seam geological areas. The method includes a drilling rig body, drill rods, and rotating components. Five sets of drill rods are rotatably mounted on the left side of the drilling rig body, and rotating components are rotatably mounted on the outer sides of the drill rods. A chute is formed inside a vertical plate, and an exhaust pipe is slidably installed at the upper end of the chute. An installation groove is formed inside the vertical plate, and a return spring is fixedly installed inside the installation groove. A locking block is fixedly installed at the upper end of the return spring. With this rapid coal uncovering method for gas tunnels in coal seam geological areas, the user can push the vertical plate towards the drilling hole. When the exhaust pipe and air inlet pipe are close to the rock strata, the drill rods separate from the borehole. A blower then fills the coal seam with air through the air inlet pipe, making the gas pressure inside the coal seam equal to that outside, shortening the time required for gas extraction and improving the working efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of gas drainage technology, specifically a method for rapid coal uncovering in gas tunnels in coal seam geological areas. Background Technology

[0002] my country has always been a major producer of coal, and coal seams generally contain methane gas, a gas that can cause asphyxiation and, under certain circumstances, explosion. Therefore, before coal mining, it is necessary to extract the methane gas from the coal seam. Since coal seams are generally located beneath rock strata, the methane gas can be extracted directly by drilling through the rock strata before mining can begin. However, the methane extraction process is usually lengthy, affecting the efficiency of coal mining operations. To expedite coal uncovering, it is necessary to rapidly extract the methane gas from the coal seam geological area. Methane extraction devices are used during the extraction process, but some of these devices have certain defects in their use, such as:

[0003] The utility model disclosure number CN205778989U discloses a gas extraction structure for tunnel construction through coal seams. The extraction boreholes inside the structure are distributed in a radiating pattern from the tunnel excavation face to the coal seam. Through the cooperation of pressure-applying boreholes, high-pressure gas pipes, gas pipe sealing devices and high-pressure gas pumps, rapid and effective gas extraction can be achieved. Furthermore, the extraction can be assisted by pressure-applying auxiliary components, which greatly improves the safety and efficiency of the entire construction.

[0004] In the aforementioned document, gas is extracted directly from the coal seam through extraction holes opened inside the extraction anchor bolts. After a period of extraction, the reduced gas content inside the coal seam can easily lead to a negative pressure state, making it difficult or impossible to continue extracting gas. This prolongs the time required for gas extraction and affects the efficiency of coal seam uncovering construction in gas tunnels.

[0005] To address the aforementioned issues, innovative design based on the existing device structure is urgently needed. Summary of the Invention

[0006] The purpose of this invention is to provide a rapid coal seam tunnel uncovering construction method in coal seam geological areas, in order to solve the problem mentioned in the background art that the reduction of gas content inside the coal seam easily leads to a negative pressure state inside the coal seam, which makes it difficult or impossible to continue to extract gas inside the coal seam, prolongs the time required for gas extraction, and affects the efficiency of coal seam uncovering construction.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for rapid coal uncovering construction of gas tunnels in coal seam geological areas, comprising a drilling rig body, drill rods, and rotating components. Five sets of drill rods are rotatably installed on the left side of the drilling rig body, and rotating components are rotatably installed on the outer side of the drill rods. The rotating components are located at the lower end of the inner side of a chute. The chute is opened inside a vertical plate, and an exhaust pipe is slidably installed at the upper end of the chute. An air inlet pipe is slidably installed at the upper end of the chute in the middle of the vertical plate. Limit blocks are fixedly installed at both ends of the air inlet pipe and the exhaust pipe. A metal hose is fixedly installed at the rear end of the exhaust pipe, and a fan is fixedly installed at the right end of the air inlet pipe. An installation groove is opened inside the vertical plate, and a return spring is fixedly installed inside the installation groove. A locking block is fixedly installed at the upper end of the return spring. The upper end of the locking block is located inside a locking groove, and the locking groove is opened at the lower end of the rotating component.

[0008] Preferably, a working frame is fixedly installed at the end of the metal hose away from the exhaust pipe, and the working frame is located inside the exhaust box. A sealing cover is fixedly installed at the front end of the exhaust box by bolts, and an installation plate is fixedly installed on the left side of the exhaust box by bolts. Two sets of fixing plates are fixedly installed inside the working frame, and a first magnetic strip is fixedly installed at the rear end of the fixing plate. A second magnetic strip is attracted to the rear end of the first magnetic strip and is located inside the dustproof net. The dustproof net is located inside the working frame, and an installation frame is fixedly installed at the lower end of the inside of the working frame. A dustproof plate is slidably installed inside the working frame, and a first sealing strip is fixedly installed on the outer side of the dustproof plate. By setting up the dustproof net and dustproof plate, dust and particles in the extracted gas can be effectively filtered. The dustproof net and dustproof plate can be disassembled and cleaned to maintain the filtration effect continuously. The installation frame can collect particles and dust to avoid clogging.

[0009] Preferably, a gas concentration detector is installed inside the right side of the working frame, and a second sealing strip is fixedly installed on the outer rear end of the gas concentration detector. A connecting pipe is fixedly installed on the front end of the gas concentration detector. A limiting plate is fixedly installed at the lower end of the exhaust box, and a sliding block is installed through the inside of the limiting plate. A fixing groove is opened on the outer side of the sliding block. Limiting rods are slidably installed at both ends of the limiting plate, and a support spring is sleeved on the outer side of the limiting rod. By inspecting the quality of the gas concentration detector, the accuracy of the gas concentration detector in detecting the gas content can be effectively improved.

[0010] Preferably, limit blocks are slidably provided at both the front and rear ends of the inner side of the slide groove, and the limit blocks are fixedly connected to the exhaust pipe and the intake pipe, allowing the exhaust pipe and the intake pipe to slide inside the slide groove via the limit blocks.

[0011] Preferably, the locking block forms a locking structure with the rotating component through the locking groove, and the locking block forms an elastic structure with the upright plate through the reset spring. The locking structure formed by the locking block and the rotating component through the locking groove can limit the rotation component by locking the locking block with the locking groove.

[0012] Preferably, the first magnetic strip and the second magnetic strip are opposite magnetic poles, and the first magnetic strip and the second magnetic strip are arranged symmetrically in two sets about the transverse central axis of the dustproof plate. The fact that the first magnetic strip and the second magnetic strip are opposite magnetic poles can generate a mutual attraction force when the first magnetic strip and the second magnetic strip are brought close together.

[0013] Preferably, the dustproof plate forms a sealing structure with the working frame through the first sealing strip, and the dustproof plate is slidably connected to the inner surface of the working frame. The dustproof plate forming a sealing structure with the working frame through the first sealing strip can seal the dustproof plate with the working frame.

[0014] Preferably, the second sealing strip is in close contact with the inner surface of the working frame, and the second sealing strip is adhered to the outer side of the gas concentration detector. The outer side of the gas concentration detector is in close contact with the limiting plate and the sliding block. The close contact between the second sealing strip and the inner surface of the working frame can seal the inner surface of the working frame and the gas concentration detector.

[0015] Preferably, the limiting rod forms an engaging structure with the sliding block through a fixing groove, and the limiting rod forms an elastic structure with the limiting plate through a supporting spring. The outer side of the sliding block is provided with fixing grooves at equal intervals, and the sliding block is slidably connected to the limiting plate. The engaging structure between the limiting rod and the sliding block through the fixing groove can limit the sliding block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The rapid coal uncovering construction method for gas tunnels in this coal seam geological area involves the following steps: After the drilling rig completes drilling into the rock and coal seams using drill rods, the user can push the vertical plate towards the drilling direction. The drill rods separate from the borehole at the point where the exhaust pipe and intake pipe are close to the rock strata. After separation, the exhaust pipe and intake pipe enter the borehole and seal it. At this point, gas can be extracted from the coal seam through the exhaust pipe, while the blower fills the coal seam with air through the intake pipe, ensuring the gas pressure inside the coal seam is consistent with the outside pressure. This facilitates the complete extraction of gas from the coal seam, shortens the time required for gas extraction, and improves the working efficiency of the device.

[0018] 2. The rapid coal uncovering construction method for gas tunnels in this coal seam geological area involves the extraction of gas. During the gas extraction process, dust and particles in the gas enter the interior of the working frame. The dustproof net and dustproof plate filter the dust and particles, which then fall into the interior of the installation frame. After the user removes the installation plate, the dustproof net and dustproof plate can be removed for cleaning, and the dust and particles inside the installation frame can be cleaned at the same time. By cleaning the dustproof net and dustproof plate, the filtration effect of the device can be effectively guaranteed.

[0019] 3. The rapid coal uncovering construction method for gas tunnels in this coal seam geological area involves a gas concentration detector that can detect the gas content inside the extracted gas during the gas extraction process. To ensure the accuracy of the gas concentration detector, it needs to be tested regularly. After removing the sealing cover, the user moves the limit rods away from each other, and then pulls the sliding block to remove the gas concentration detector for testing. Regular quality testing of the gas concentration detector can effectively ensure its accuracy, thereby improving the ease of use of the device. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the left-side structure of the vertical plate of the present invention;

[0022] Figure 3 This is a schematic diagram of the front sectional view of the vertical plate of the present invention;

[0023] Figure 4 This is a front view schematic diagram of the vertical plate structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the left side of the exhaust box structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the left cross-sectional structure of the exhaust box of the present invention;

[0026] Figure 7 This is a schematic diagram of the left cross-sectional structure of the dustproof plate of the present invention;

[0027] Figure 8 This is a top sectional view of the sliding block structure of the present invention;

[0028] Figure 9 For the present invention Figure 8 A magnified structural diagram at point A in the diagram.

[0029] In the diagram: 1. Drill rig body; 2. Drill rod; 3. Rotating component; 4. Vertical plate; 5. Slide groove; 6. Exhaust pipe; 7. Limiting block; 8. Metal flexible hose; 9. Air inlet pipe; 10. Fan; 11. Mounting groove; 12. Return spring; 13. Locking block; 14. Locking groove; 15. Working frame; 16. Exhaust box; 17. Sealing cover; 18. Fixing plate; 19. First magnetic strip; 20. Second magnetic strip; 21. Dustproof net; 22. Dustproof plate; 23. First sealing strip; 24. Mounting frame; 25. Gas concentration detector; 26. Second sealing strip; 27. Limiting plate; 28. Sliding block; 29. ​​Fixing groove; 30. Limiting rod; 31. Support spring; 32. Connecting pipe; 33. Mounting plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9 This invention provides a technical solution: a method for rapid coal uncovering construction of gas tunnels in coal seam geological areas, comprising a drilling rig body 1, a drill rod 2, a rotating component 3, a vertical plate 4, a sliding groove 5, an exhaust pipe 6, a limiting block 7, a metal hose 8, an air inlet pipe 9, a fan 10, an installation groove 11, a return spring 12, a locking block 13, a locking groove 14, a working frame 15, an exhaust box 16, a sealing cover 17, a fixing plate 18, a first magnetic strip 19, a second magnetic strip 20, a dustproof net 21, a dustproof plate 22, a first sealing strip 23, an installation frame 24, a gas concentration detector 25, a second sealing strip 26, a limiting plate 27, a sliding block 28, a fixing groove 29, a limiting rod 30, a support spring 31, a connecting pipe 32, and an installation plate 33.

[0032] Five sets of drill rods 2 are rotatably mounted on the left side of the drill rig body 1, and rotating parts 3 are rotatably mounted on the outer side of the drill rods 2. The rotating parts 3 are located at the lower end of the inner side of the slide groove 5. The slide groove 5 is opened inside the vertical plate 4, and an exhaust pipe 6 is slidably mounted on the upper end of the inner side of the slide groove 5. An air inlet pipe 9 is slidably mounted on the upper end of the inner side of the slide groove 5 in the middle of the vertical plate 4. Limiting blocks 7 are fixedly installed at both ends of the air inlet pipe 9 and the exhaust pipe 6. A metal hose 8 is fixedly installed at the rear end of the exhaust pipe 6, and a fan 10 is fixedly installed at the right end of the air inlet pipe 9. The plate 4 has an installation groove 11 inside, and a return spring 12 is fixedly installed inside the installation groove 11. A locking block 13 is fixedly installed on the upper end of the return spring 12. The upper end of the locking block 13 is located inside the locking groove 14, and the locking groove 14 is located at the lower end of the rotating part 3. Limiting blocks 7 are slidably installed at both the front and rear ends inside the sliding groove 5. The limiting blocks 7 are fixedly connected to the exhaust pipe 6 and the intake pipe 9. The locking block 13 forms a locking structure with the rotating part 3 through the locking groove 14, and the locking block 13 forms an elastic structure with the upright plate 4 through the return spring 12.

[0033] according to Figure 1-4 During the rapid coal uncovering construction of the gas tunnel in this coal seam geological area, the device is first placed at the required working position. After the drill body 1 drills the rock and coal seams to the required position using the drill rod 2, the drill body 1 stops working. Then, the vertical plate 4 can be pushed towards the outside of the rock seam. During this process, the locking block 13 is squeezed by the locking groove 14 and moves into the installation groove 11. After the locking block 13 separates from the locking groove 14, the vertical plate 4 can slide on the outside of the rotating part 3. During this process, the vertical plate 4 will drive the exhaust pipe 6 and the air inlet pipe 9 to move. When the exhaust pipe 6 and the air inlet pipe 9 come into contact with the rock seam, the user moves the drill body 1 away from the rock seam and pulls the drill rod 2 out of the borehole. During this process, drill rod 2 and rotating part 3 will slide inside the chute 5. When drill rod 2 separates from the borehole, the user pushes exhaust pipe 6 and air inlet pipe 9 into the borehole for sealing (borehole sealing is existing technology and has been disclosed, so it does not need to be explained again). At this time, the suction pipe and the connecting pipe 32 can be sealed and connected. Then, the gas inside the coal seam can be extracted through the borehole. During the process of extracting the gas through exhaust pipe 6, blower 10 will blow air into the coal seam through air inlet pipe 9, so that the gas pressure inside the coal seam is consistent with the outside, which facilitates the rapid extraction of gas inside the coal seam, shortens the time required for gas extraction, and improves the working efficiency of the device.

[0034] A working frame 15 is fixedly installed at the end of the metal flexible hose 8 away from the exhaust pipe 6, and the working frame 15 is located inside the exhaust box 16. A sealing cover 17 is fixedly installed at the front end of the exhaust box 16 by bolts. At the same time, an installation plate 33 is fixedly installed on the left side of the exhaust box 16 by bolts. Two sets of fixing plates 18 are fixedly installed inside the working frame 15, and a first magnetic strip 19 is fixedly installed at the rear end of the fixing plate 18. A second magnetic strip 20 is attracted to the rear end of the first magnetic strip 19. The second magnetic strip 20 is located inside the dustproof net 21. Located inside the working frame 15, and with the lower end of the working frame 15 fixedly installed, a dustproof plate 22 is slidably installed inside the working frame 15, and a first sealing strip 23 is fixedly installed on the outer side of the dustproof plate 22. The first magnetic strip 19 and the second magnetic strip 20 are opposite magnetic poles, and two sets of the first magnetic strip 19 and the second magnetic strip 20 are symmetrically arranged about the transverse central axis of the dustproof plate 22. The dustproof plate 22 and the working frame 15 form a sealing structure through the first sealing strip 23, and the dustproof plate 22 is slidably connected to the inner surface of the working frame 15.

[0035] according to Figure 1 and Figure 5-7 During the gas extraction process, the gas enters the working frame 15 through the exhaust pipe 6 and the metal hose 8. After entering the working frame 15, the dust screen 21 and dust plate 22 filter the dust and particles in the air. The dust and particles filtered out of the gas accumulate inside the mounting frame 24. After the device has been used for a period of time, the user needs to clean the dust screen 21, dust plate 22, and the dust inside the mounting frame 24. During this process, the user can remove the mounting plate 33 from the outside of the exhaust box 16 to remove the dust screen 21 and dust plate 22 for cleaning, and clean the dust particles inside the mounting frame 24. By cleaning the dust screen 21 and dust plate 22, the filtration effect of the dust screen 21 and dust plate 22 is effectively guaranteed, thereby effectively ensuring the filtration effect of the device.

[0036] A gas concentration detector 25 is installed inside the right side of the working frame 15, and a second sealing strip 26 is fixedly installed on the outer rear end of the gas concentration detector 25. A connecting pipe 32 is fixedly installed on the front end of the gas concentration detector 25. A limiting plate 27 is fixedly installed at the lower end of the exhaust box 16, and a sliding block 28 is installed through the inside of the limiting plate 27. A fixing groove 29 is opened on the outer side of the sliding block 28. Limiting rods 30 are slidably installed on both the left and right ends of the limiting plate 27, and a support is sleeved on the outer side of the limiting rods 30. Spring 31 and second sealing strip 26 are in close contact with the inner surface of working frame 15, and second sealing strip 26 is adhered to the outer side of gas concentration detector 25. The outer side of gas concentration detector 25 is in close contact with limiting plate 27 and sliding block 28. Limiting rod 30 forms a locking structure with sliding block 28 through fixing groove 29. Limiting rod 30 forms an elastic structure with limiting plate 27 through supporting spring 31. Fixing groove 29 is provided at equal intervals on the outer side of sliding block 28. At the same time, sliding block 28 is slidably connected to limiting plate 27.

[0037] according to Figure 1 and Figure 8-9 During the process of the gas passing through the working frame 15 and the gas concentration detector 25 into the connecting pipe 32, the gas concentration detector 25 can detect the gas content in the gas. The gas concentration detector 25 needs to be regularly inspected for safety. During this process, after the user removes the sealing cover 17 from the front end of the exhaust box 16, the user separates the two sets of limiting rods 30 from the fixing groove 29. At this time, the two sets of support springs 31 will be in a stretched state. After the limiting rods 30 are separated from the fixing groove 29, the user moves the sliding block 28 from the limiting plate 27. The gas concentration detector 25 can be removed from the surface for testing after sliding out from the inside. Once the gas concentration detector 25 has completed its testing, it is reinstalled in its initial position. Testing the gas concentration detector 25 effectively ensures the accuracy of its gas content detection. This completes the process of detecting the gas content inside the coal seam using the gas concentration detector 25. Regular quality testing of the gas concentration detector 25 effectively guarantees its accuracy, thereby improving the ease of use and overall practicality of the device.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for rapid coal uncovering construction in a gas tunnel in a coal seam geological area, comprising a drilling rig body (1), a drill rod (2), and a rotating component (3), characterized in that: Five sets of drill rods (2) are rotatably installed on the left side of the main body (1) of the drilling rig, and a rotating part (3) is rotatably installed on the outside of the drill rods (2). The rotating part (3) is located at the lower end of the inner side of the slide groove (5). The slide groove (5) is opened inside the vertical plate (4), and an exhaust pipe (6) is slidably installed at the upper end of the inner side of the slide groove (5). An air inlet pipe (9) is slidably installed at the upper end of the inner side of the slide groove (5) in the middle position of the vertical plate (4). The front and rear ends of the air inlet pipe (9) and the exhaust pipe (6) are fixedly installed. There is a limit block (7), and a metal hose (8) is fixedly installed at the rear end of the exhaust pipe (6), and a fan (10) is fixedly installed at the right end of the air intake pipe (9). The interior of the upright plate (4) is provided with an installation groove (11), and a return spring (12) is fixedly installed inside the installation groove (11). A locking block (13) is fixedly installed at the upper end of the return spring (12). The upper end of the locking block (13) is located inside the locking groove (14), and the locking groove (14) is opened at the lower end of the rotating part (3).

2. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 1, characterized in that: The metal hose (8) is fixedly installed with a working frame (15) at the end away from the exhaust pipe (6), and the working frame (15) is located inside the exhaust box (16). The front end of the exhaust box (16) is fixedly installed with a sealing cover (17) by bolts. At the same time, the left side of the exhaust box (16) is fixedly installed with a mounting plate (33) by bolts. Two sets of fixing plates (18) are fixedly installed inside the working frame (15). The rear end of the fixing plate (18) is fixedly installed with a first magnetic strip (19). The rear end of the first magnetic strip (19) is attracted to a second magnetic strip (20). The second magnetic strip (20) is located inside the dustproof net (21). The dustproof net (21) is located inside the working frame (15). The lower end of the working frame (15) is fixedly installed with a mounting frame (24). The working frame (15) is slidably installed with a dustproof plate (22). The outer side of the dustproof plate (22) is fixedly installed with a first sealing strip (23).

3. The method for rapid coal uncovering in a gas tunnel in a coal seam geological area according to claim 2, characterized in that: A gas concentration detector (25) is installed inside the right side of the working frame (15), and a second sealing strip (26) is fixedly installed on the outer rear end of the gas concentration detector (25). A connecting pipe (32) is fixedly installed on the front end of the gas concentration detector (25). A limiting plate (27) is fixedly installed at the lower end of the exhaust box (16), and a sliding block (28) is installed through the inside of the limiting plate (27). A fixing groove (29) is opened on the outer side of the sliding block (28). Limiting rods (30) are slidably installed on both the left and right ends of the limiting plate (27), and a support spring (31) is sleeved on the outer side of the limiting rod (30).

4. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 1, characterized in that: Limiting blocks (7) are slidably provided at both the front and rear ends of the inner side of the slide groove (5), and the limiting blocks (7) are fixedly connected to the exhaust pipe (6) and the intake pipe (9).

5. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 1, characterized in that: The locking block (13) forms a locking structure with the rotating part (3) through the locking groove (14), and the locking block (13) forms an elastic structure with the upright plate (4) through the return spring (12).

6. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 2, characterized in that: The first magnetic strip (19) and the second magnetic strip (20) are opposite magnetic poles, and the first magnetic strip (19) and the second magnetic strip (20) are arranged symmetrically about the transverse central axis of the dustproof plate (22).

7. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 2, characterized in that: The dustproof plate (22) forms a sealed structure with the working frame (15) through the first sealing strip (23), and the dustproof plate (22) and the inner surface of the working frame (15) are slidably connected.

8. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 3, characterized in that: The second sealing strip (26) is in close contact with the inner surface of the working frame (15), and the second sealing strip (26) is bonded to the outside of the gas concentration detector (25), and the outside of the gas concentration detector (25) is in close contact with the limiting plate (27) and the sliding block (28).

9. The method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 3, characterized in that: The limiting rod (30) forms a locking structure with the sliding block (28) through the fixing groove (29), and the limiting rod (30) forms an elastic structure with the limiting plate (27) through the support spring (31). The outer side of the sliding block (28) is provided with fixing grooves (29) at equal intervals, and the sliding block (28) and the limiting plate (27) are slidably connected.

10. A method for rapid coal seam tunnel uncovering in a gas-bearing geological area according to claim 3, characterized in that: Includes the following steps: S1: During the process of sealing the borehole drilled by the drill rod (2) with the air inlet pipe (9) and the exhaust pipe (6), the user pushes the upright plate (4) to move towards the position of the borehole. The upright plate (4) will drive the air inlet pipe (9) and the exhaust pipe (6) to move towards the position of the borehole. After the upright plate (4) moves to the side of the rock layer, the drill rod (2) is separated from the borehole. The air inlet pipe (9) and the exhaust pipe (6) enter the interior of the borehole through the upright plate (4). Then, the gas can be sucked through the pipe connected to the connecting pipe (32), and the blower (10) will blow the gas into the interior of the rock layer through the air inlet pipe (9). S2: During the process of filtering gas through the dustproof net (21) and dustproof plate (22), the user can remove the dustproof net (21) and dustproof plate (22) after removing the mounting plate (33). At the same time, the dust and particles inside the mounting frame (24) can be cleaned. By cleaning the dustproof net (21) and dustproof plate (22), the dustproof net (21) and dustproof plate (22) can always maintain the filtering effect. S3: During the process of gas extraction, the gas concentration detector (25) can detect the gas content in the gas. In order to maintain the detection accuracy of the gas concentration detector (25), it is necessary to perform safety tests on it regularly. During this process, the user removes the sealing cover (17) to separate the two sets of limiting rods (30) from the fixing groove (29). Then, by pushing the sliding block (28) to slide inside the limiting plate (27), the gas concentration detector (25) can be removed for quality and safety testing.

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