A high-efficiency gas extraction process and extraction recovery device based on non-solidifying sealing material

Abstract

This invention relates to the field of mine gas control equipment and technology, specifically to a high-efficiency gas extraction process and extraction and recovery device based on non-solidified sealing materials. The specific extraction process is as follows: a support device is placed in the sealing section; an extraction pipe is inserted through the central hole of the support device; two sealing water bags are placed before and after the support device; after water injection, the water bags expand to form a seal; non-solidified grout is injected into the sealing section through the grouting pipe via a grouting system; after extraction, the grout discharge system discharges and collects the grout from the sealing section, then drains the water from the sealing bags on both sides, removes the water injection pipe, the two sealing water bags, the grouting pipe, and the gas extraction pipe, and controls the hook rod to pass through the hook hole of the support rod in the middle of the support device to remove the support device for reuse. This invention is simple to operate, not only achieving dynamic sealing with non-solidified sealing materials, but also realizing borehole support and related equipment and resource recovery, improving the sealing and extraction effect, and effectively reducing costs.

Description

Technical Field

[0001] This invention relates to the field of mine gas control equipment and technology, specifically to a high-efficiency gas extraction process and extraction and recovery device based on non-solidified sealing materials. Background Technology

[0002] Gas drainage is a core strategy for preventing gas accidents in my country's coal mining sector, playing a crucial role in the comprehensive management and control of gas within the gas disaster prevention and control system. However, extensive practical data from gas drainage practices show that approximately 65% ​​of the boreholes in my country's longwall mining faces have a pre-drained gas concentration of less than 30%, making it difficult to meet the established standards for gas pre-drainage rates. During gas drainage, the sealing process is critical. Traditional solidifying materials are prone to cracking after sealing due to coal seam deformation, leading to gas leakage. Non-solidifying material sealing is a new and effective technology that can better adapt to the complex environment within the borehole. Because it is in a non-solidified or semi-fluid state, it can self-adjust with slight coal seam movements within the borehole, maintaining a relatively continuous sealing ability against surrounding cracks. This material can be injected into the borehole under pressure using equipment such as grouting pumps, ensuring it fills all possible fissures in the coal and rock. Even if the borehole deforms or is damaged to a certain extent, re-grouting can still ensure the tightness of the seal, effectively solving the problem of new fissures formed due to borehole deformation, leading to sealing failure and rapid decay of extraction concentration. Patent CN212130542U discloses a non-solidifying constant pressure grout bag sealing system for gas extraction boreholes, but the grouting auxiliary pipes for sealing the material are inserted through holes drilled on the top and bottom sides, which can easily cause borehole collapse; moreover, the material injected into the bags is all non-solidifying, which cannot provide support for the borehole; pressure sensors are used in both bags and the non-solidifying grouting pipes, and there is no recycling process, resulting in high costs. Patent CN10511103A discloses a non-solidifying constant pressure grout sealing method for gas extraction boreholes, but its use of polyurethane material for sealing results in high costs, easily generates harmful gases, and the extraction pipes cannot be recycled. Patent CN111561291B discloses a double-layer extrusion sealing device and method for gas drainage boreholes. However, both the front and rear sealing capsules use an expanding agent injected with water for expansion and sealing, making the drainage pipe unrecoverable and resulting in high costs. Therefore, there is an urgent need to develop a reliable, low-cost, and highly practical sealing device and method for non-solidifying material gas drainage boreholes in coal mines to promote the sustainable development of safe coal mine production. Summary of the Invention

[0003] This invention addresses the technical problems of poor reliability, low extraction efficiency, and high costs caused by the inability to recover extracted gas from boreholes in current gas extraction drilling and sealing devices and methods. It provides a high-efficiency gas extraction process and extraction and recovery device based on non-solidified sealing materials.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-efficiency gas extraction and recovery device based on non-solidified sealing materials, comprising:

[0005] A support device is located in the middle of the borehole plugging section. The support device includes an outer support cylinder and a central hole pipe is provided along the central axis of the outer support cylinder. Multiple support plates are fixed inside the outer support cylinder. Hook holes are provided on the support plates connecting the outer support cylinder and the outer wall of the central hole pipe.

[0006] The gas extraction pipe, which passes through the central hole of the support device, is located at the center of the borehole.

[0007] A gas extraction system, which is connected to one end of a gas extraction pipe;

[0008] Two water-filled bags are provided and are respectively located at the front and rear ends of the support device, namely water-filled bag I and water-filled bag II;

[0009] The system includes a water injection pipe connected to a water-sealing bladder bag at one end, and a valve a connected to the water injection pipe.

[0010] The grouting system is connected to a grouting pipe that extends into the sealing section, and a pressure valve is installed on the grouting pipe;

[0011] A slurry discharge system, which is connected to a slurry discharge pipe extending into the sealing section, and a valve b is installed on the slurry discharge pipe;

[0012] The central control platform is used to control the operation of various systems and valves. The injection and drainage system, gas extraction system, grouting system, grout discharge system, valve a, pressure valve, and valve b are all electrically connected to the central control platform.

[0013] As a further limitation of the technical solution of the present invention, the gas extraction pipe is further fitted with an extraction pipe fixing device at its extraction end, the extraction pipe fixing device comprising:

[0014] Square casing;

[0015] A cylindrical inner tube is fixed inside a square outer shell, and multiple connecting columns are fixed between the outer wall of the cylindrical inner tube and the inner wall of the square outer shell.

[0016] The fixing claws are provided in multiples, and the multiple fixing claws are evenly distributed on the inner circumference of the cylindrical inner tube.

[0017] The drive unit includes four drive motors. The drive motors are installed inside the square housing and electrically connected to the main control platform. The output shaft of each drive motor is equipped with a vertical gear, which meshes with a horizontal gear. The output shafts of two drive motors face the left side wall of the square housing, and the output shafts of the other two drive motors face the right side wall of the square housing.

[0018] There are four transverse screws, which are installed in pairs on the left and right side walls of the square shell. One end of the transverse screw extends out of the side wall of the square shell and is fixed with a support claw at the end. One end of the transverse screw located on the square shell meshes with a transverse gear.

[0019] There are four vertical screws, which are installed in pairs on the upper and lower side walls of the square shell. One end of the vertical screw extends out of the side wall of the square shell and is fixed with a support claw at the end. One end of the vertical screw located on the square shell meshes with a vertical gear.

[0020] A high-efficiency gas extraction process based on non-solidified sealing materials, using the aforementioned gas extraction and recovery device, includes the following steps:

[0021] Step 1: Pass the gas extraction pipe through the central hole pipe of the support device and then insert it into the borehole. Pass the sealing water bag connected to the water injection pipe through the gap of the support device and place it at both ends of the support device. Place the end of the grouting pipe in the gap between the sealing water bag and the support device at the borehole opening.

[0022] Step 2: Open the water injection and drainage system to inject water into the sealing water bladder until the set pressure value is reached, causing it to expand and achieve a sealing effect. Then close valve a on the water injection pipe and shut off the water injection and drainage system.

[0023] Step 3: Open the pressure valve on the grouting pipe, open the grouting system, and inject non-solidified sealing grout into the sealing section. When the set pressure value is reached, close the pressure valve and the grouting system.

[0024] Step 3: Turn on the gas extraction system to extract gas. The gas extraction system has a built-in gas concentration monitoring module. If a decrease in gas concentration is detected, and at the same time, the pressure valve on the grouting pipe detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system to perform grouting again. After the set pressure value is reached and the extraction concentration reaches % of the initial extraction concentration, close the pressure valve and the grouting system to achieve dynamic sealing.

[0025] Step 4: After extraction is completed, open valve b on the slurry discharge pipe to open the slurry discharge system to discharge the non-solidified sealing slurry in the sealing section, and then open valve a on the water injection pipe to open the water injection and drainage system to discharge the water inside the sealing water bag.

[0026] Step 5: Remove the sealing water bag, water injection pipe, grouting pipe, and grout discharge pipe. Use a hook rod to connect to the hook hole of the support device, remove the support device, and then remove the extraction pipe. Clean each device to achieve the recovery of each device.

[0027] As a further limitation of the technical solution of the present invention, a high-efficiency gas extraction process based on non-solidified sealing materials includes the following steps:

[0028] Step 1: Pass the gas extraction pipe through the central hole of the support device and then insert it into the borehole. Connect the extraction pipe fixing device to the extraction end of the gas extraction pipe. Start the drive motor so that the horizontal screw and vertical screw extend out of the square shell, so that multiple support claws support the inner wall of the borehole to fix the gas extraction pipe. Pass the sealing water bag connected to the water injection pipe through the gap of the support device and place it at both ends of the support device. Place the end of the grouting pipe in the gap between the sealing water bag and the support device at the borehole opening.

[0029] Step 2: Open the water injection and drainage system to inject water into the sealing water bladder until the set pressure value is reached, causing it to expand and achieve a sealing effect. Then close valve a on the water injection pipe and shut off the water injection and drainage system.

[0030] Step 3: Open the pressure valve on the grouting pipe, open the grouting system, and inject non-solidified sealing grout into the sealing section. When the set pressure value is reached, close the pressure valve and the grouting system.

[0031] Step 3: Turn on the gas extraction system to extract gas. The gas extraction system has a built-in gas concentration monitoring module. If a decrease in gas concentration is detected, and at the same time, the pressure valve on the grouting pipe detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system to perform grouting again. After the set pressure value is reached and the extraction concentration reaches % of the initial extraction concentration, close the pressure valve and the grouting system to achieve dynamic sealing.

[0032] Step 4: After extraction is completed, open valve b on the slurry discharge pipe to open the slurry discharge system to discharge the non-solidified sealing slurry in the sealing section, and then open valve a on the water injection pipe to open the water injection and drainage system to discharge the water inside the sealing water bag.

[0033] Step 5: Remove the sealing water bag, water injection pipe, grouting pipe, and grout discharge pipe. Use a hook rod to connect the hook hole of the support device, remove the support device, start the drive motor to retract the horizontal and vertical screws, then remove the gas extraction pipe and extraction pipe fixing device, clean each device, and realize the recovery of each device.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This invention can significantly improve the sealing efficiency of gas drainage boreholes, effectively enhance borehole utilization efficiency, and achieve excellent sealing results. The main innovations of this invention are: (1) using a specially designed support device and water bag for sealing, and utilizing a central control platform to control the grouting system and gas drainage system to achieve dynamic sealing throughout the gas drainage process. (2) utilizing a central control platform to control the injection and drainage system, slurry discharge system, and robotic arm hook rod to achieve device recovery. (3) utilizing a specially designed extraction pipe fixing device to avoid problems such as low extraction efficiency and increased wear of the extraction pipe caused by shaking during the extraction process. This method is simple, easy to operate, highly reliable, and low in cost, making it suitable for widespread use in mine gas drainage boreholes. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall device structure of the present invention.

[0037] Figure 2 This is a schematic diagram of the support device of the present invention.

[0038] Figure 3 This is a schematic diagram of the hook rod of the present invention.

[0039] Figure 4 This is a schematic diagram of the extraction tube fixing device of the present invention.

[0040] The markings in the image are as follows:

[0041] 1-Gas extraction pipe, 2-Water injection pipe, 3-Water bladder II, 4-Valve a, 5-Injection and drainage system, 6-Gas extraction system, 7-Main control platform, 8-Grouting system, 9-Pressure valve, 10-Slurry discharge system, 11-Valve b, 12-Slurry discharge pipe, 13-Grouting pipe, 14-Support device, 15-Outer support cylinder, 16-Intermediate hole pipe, 17-Support plate, 18-Hook hole, 19-Hook rod, 20-Water bladder I, 21-Extraction pipe fixing device, 22-Connecting column, 23-Cylindrical inner pipe, 24-Fixing claw, 25-Drive motor, 26-Vertical gear, 27-Horizontal gear, 28-Horizontal screw, 29-Vertical screw, 30-Support claw, 31-Square outer shell. Detailed Implementation

[0042] The present invention will be further described below with reference to specific embodiments. Example 1

[0043] like Figure 1 As shown, a high-efficiency gas extraction and recovery device based on non-solidified sealing materials includes:

[0044] Support device 14, located in the middle of the borehole plugging section, is used to support the drill bit, such as... Figure 2As shown, the support device 14 includes an outer support cylinder 15, with a central bore tube 16 located along the central axis of the outer support cylinder 15. Multiple support plates 17 are fixedly connected inside the outer support cylinder 15, and hook holes 18 are provided on the support plates 17 connecting the outer support cylinder 15 and the outer wall of the central bore tube 16. The support device 14 is equipped with hook rods 19, such as... Figure 3 As shown, the hook 19 is used by the robotic arm controlled by the central control platform 7 to retrieve the support device.

[0045] The size of the support device 14 is configured according to the specific borehole diameter. The support device can be arranged not only in the sealing section, but also in each section of the borehole to play a support role.

[0046] The gas extraction pipe 1, which passes through the central hole pipe 16 of the support device 14, is located at the center of the borehole and is used for gas extraction.

[0047] The gas extraction system 6 is connected to one end of the gas extraction pipe 1 and has a built-in gas concentration monitoring module for gas extraction and gas concentration monitoring.

[0048] Two water-filled bags are provided and are respectively located at the front and rear ends of the support device 14, namely water-filled bag I20 and water-filled bag II3; they are used to seal both ends after water is injected.

[0049] The water injection and drainage system 5 is connected to a water injection pipe 2, the end of which is connected to a sealing water bladder bag, and a valve a4 is connected to the water injection pipe 2; it is used for water injection and drainage of the two sealing water bladder bags.

[0050] The grouting system 8 is connected to a grouting pipe 13 that extends into the sealing section. A pressure valve 9 is installed on the grouting pipe 13. The grouting pipe 13 is used to inject non-solidified grout at a set pressure into the sealing section. The grouting pipe passes through the sealing section. The pressure valve 9 is used to monitor the pressure value of the sealing section. It automatically opens when the pressure value drops or the gas extraction concentration drops. The grouting system injects grout into the sealing section until the set pressure value is reached. Then the sealing is completed and the pressure valve closes.

[0051] The slurry discharge system 10 is connected to a slurry discharge pipe 12 that extends into the sealing section, and a valve b11 is installed on the slurry discharge pipe 12; used to discharge and recycle the used non-solidified slurry after the sealing is completed.

[0052] The central control platform 7 is used to control the operation of various systems and valves. The injection and drainage system 5, gas extraction system 6, grouting system 8, grout discharge system 10, valve a4, pressure valve 9, and valve b11 are all electrically connected to the central control platform 7. All valves and systems are controlled and used in conjunction with the central control platform 7. Example 2

[0053] As a further limitation of the technical solution of the present invention, based on Embodiment 1, the gas extraction pipe 1 is further fitted with an extraction pipe fixing device 21 at its extraction end, such as... Figure 4 As shown, the extraction tube fixing device 21 includes:

[0054] Square casing 31;

[0055] A cylindrical inner tube 23 is fixed inside a square outer shell 31, and multiple connecting columns 22 are fixed between the outer wall of the cylindrical inner tube 23 and the inner wall of the square outer shell 31.

[0056] The fixing claws 24 are provided in multiples, and the multiple fixing claws 24 are evenly distributed on the inner circumference of the cylindrical inner tube 23.

[0057] The drive unit includes four drive motors 25. The drive motors 25 are installed inside the square housing 31 and electrically connected to the main control platform 7. The output shaft of the drive motor 25 is equipped with a vertical gear 26, which meshes with a horizontal gear 27. The output shafts of two drive motors 25 face the left side wall of the square housing 31, and the output shafts of the other two drive motors 25 face the right side wall of the square housing 31.

[0058] There are four transverse screws 28, which are installed in pairs on the left and right side walls of the square housing 31. One end of the transverse screw 28 extends out of the side wall of the square housing 31 and is fixed with a support claw 30 at the end. One end of the transverse screw 28 located in the square housing 31 meshes with the transverse gear 27.

[0059] There are four vertical screws 29, which are installed in pairs on the upper and lower side walls of the square housing 31. One end of the vertical screw 29 extends out of the side wall of the square housing 31 and is fixed with a support claw 30. One end of the vertical screw 29 located in the square housing 31 meshes with the vertical gear 26.

[0060] A gas extraction pipe fixing device 21 is used to fix the gas extraction pipe and prevent it from shaking. The gas extraction pipe fixing device 21 is connected to the end of the gas extraction pipe 1 and is connected to the control wire by the main control platform 7 to control the rotation of the drive motor 25, thereby controlling the rotation of the vertical gear 26. The vertical gear 26 meshes with the horizontal gear 27 and the vertical screw 29 to rotate, and the horizontal gear meshes with the horizontal screw 28 to rotate. The horizontal screw 28 and the vertical screw 29 achieve extension and retraction functions through rotation. The support claw 30 fits against the borehole wall to ensure that the square outer shell 31 is fixed. The square outer shell 31 is connected to the cylindrical inner tube 23 through the connecting column. The cylindrical inner tube 23 is provided with a fixing claw 24 for connecting the end of the gas extraction pipe 1 to achieve the fixation of the gas extraction pipe 1. Example 3

[0061] A high-efficiency gas extraction process based on non-solidified sealing materials, using the gas extraction and recovery device of Example 1 above, includes the following steps:

[0062] Step 1: Pass the gas extraction pipe 1 through the central hole pipe 16 of the support device 14 and then insert it into the borehole. Pass the sealing water bag connected to the water injection pipe 2 through the gap of the support device 1 and place it at both ends of the support device 14. Place the end of the grouting pipe 13 in the gap between the sealing water bag and the support device 14 at the borehole opening.

[0063] Step 2: Open the water injection and drainage system 5 to inject water into the sealing water bladder until the set pressure value is reached, causing it to expand and achieve a sealing effect. Then close valve a4 on the water injection pipe and shut off the water injection and drainage system 5.

[0064] Step 3: Open the pressure valve 9 on the grouting pipe 13, open the grouting system 8, inject non-solidified sealing grout into the sealing section, and close the pressure valve 9 and the grouting system 8 when the set pressure value is reached.

[0065] Step 3: Open the gas extraction system 6 to extract gas. The gas extraction system 6 has a built-in gas concentration monitoring module. If the gas concentration decreases and the pressure valve 9 on the grouting pipe 13 detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system 8 to perform grouting again. After the set pressure value is reached and the extraction concentration reaches 80% of the initial extraction concentration, close the pressure valve 9 and the grouting system 8 to achieve dynamic sealing.

[0066] Step 4: After extraction is completed, open valve b11 on the slurry discharge pipe and open slurry discharge system 10 to discharge the non-solidified sealing slurry in the sealing section. Then open valve a4 on the water injection pipe and open water injection and drainage system 5 to discharge the water inside the sealing water bag.

[0067] Step 5: Remove the sealing water bag, water injection pipe 2, grouting pipe 13, and grout discharge pipe 12. Use a hook rod to connect the hook hole 18 of the support device 14, remove the support device 14, and then remove the extraction pipe. Clean each device to achieve the recovery of each device. Example 4

[0068] A high-efficiency gas extraction process based on non-solidified sealing materials, using the gas extraction and recovery device of Example 2 above, includes the following steps:

[0069] Step 1: Pass the gas extraction pipe 1 through the central hole pipe 16 of the support device 14 and then insert it into the borehole. Connect the extraction pipe fixing device 21 to the extraction end of the gas extraction pipe 1. Start the drive motor 25 so that the horizontal screw 28 and the vertical screw 29 extend outward from the square shell 31, so that multiple support claws 30 support the inner wall of the borehole to fix the gas extraction pipe 1. Pass the sealing water bag connected to the water injection pipe 2 through the gap of the support device 1 and place it at both ends of the support device 14. Place the end of the grouting pipe 13 in the gap between the sealing water bag and the support device 14 at the borehole opening.

[0070] Step 2: Open the water injection and drainage system 5 to inject water into the sealing water bladder until the set pressure value is reached, causing it to expand and achieve a sealing effect. Then close valve a4 on the water injection pipe and shut off the water injection and drainage system 5.

[0071] Step 3: Open the pressure valve 9 on the grouting pipe 13, open the grouting system 8, inject non-solidified sealing grout into the sealing section, and close the pressure valve 9 and the grouting system 8 when the set pressure value is reached.

[0072] Step 3: Open the gas extraction system 6 to extract gas. The gas extraction system 6 has a built-in gas concentration monitoring module. If the gas concentration decreases and the pressure valve 9 on the grouting pipe 13 detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system 8 to perform grouting again. After the set pressure value is reached and the extraction concentration reaches 80% of the initial extraction concentration, close the pressure valve 9 and the grouting system 8 to achieve dynamic sealing.

[0073] Step 4: After extraction is completed, open valve b11 on the slurry discharge pipe and open slurry discharge system 10 to discharge the non-solidified sealing slurry in the sealing section. Then open valve a4 on the water injection pipe and open water injection and drainage system 5 to discharge the water inside the sealing water bag.

[0074] Step 5: Remove the sealing water bag, water injection pipe 2, grouting pipe 13, and grout discharge pipe 12. Use a hook rod to connect the hook hole 18 of the support device 14 and remove the support device 14. Start the drive motor 25 to retract the horizontal screw 28 and the vertical screw 29. Then remove the gas extraction pipe 1 and the extraction pipe fixing device 21, clean each device, and realize the recovery of each device.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art can make various changes to the form and details of the present invention without creative effort. In short, all changes to the form and details of the present invention made by those skilled in the art should be within the scope of protection defined by the claims.

Claims

1. A high-efficiency gas extraction and recovery device based on non-solidifying sealing materials, characterized in that, include: The support device (14) is located in the middle of the borehole sealing section. The support device (14) includes an outer support cylinder (15) and a central hole pipe (16) is provided along the central axis of the outer support cylinder (15). Multiple support plates (17) are fixed inside the outer support cylinder (15). Hook holes (18) are provided on the support plates (17) that connect the outer support cylinder (15) and the outer wall of the central hole pipe (16). The gas extraction pipe (1) passes through the central hole pipe (16) of the support device (14) and is located at the center of the borehole; A gas extraction system (6) is connected to one end of a gas extraction pipe (1); Two water-filled bags are provided and are respectively located at the front and rear ends of the support device (14), namely water-filled bag I (20) and water-filled bag II (3). The water injection and drainage system (5) is connected to a water injection pipe (2), the end of which is connected to a water-sealing bag, and a valve a (4) is connected to the water injection pipe (2). The grouting system (8) is connected to a grouting pipe (13) that extends into the sealing section, and a pressure valve (9) is installed on the grouting pipe (13). A slurry discharge system (10) is connected to a slurry discharge pipe (12) extending into the sealing section, and a valve b (11) is installed on the slurry discharge pipe (12). The central control platform (7) is used to control the operation of each system and valve. The injection and drainage system (5), gas extraction system (6), grouting system (8), grout discharge system (10), valve a (4), pressure valve (9), and valve b (11) are all electrically connected to the central control platform (7).

2. The high-efficiency gas extraction and recovery device based on non-solidified sealing materials according to claim 1, characterized in that, The gas extraction pipe (1) is also fitted with an extraction pipe fixing device (21) at its extraction end. The extraction pipe fixing device (21) includes: Square outer shell (32); A cylindrical inner tube (23) is fixed inside a square outer shell (32), and multiple connecting columns (22) are fixed between the outer wall of the cylindrical inner tube (23) and the inner wall of the square outer shell (32). The fixing claws (24) are provided in multiples, and the multiple fixing claws (24) are evenly distributed on the inner circumference of the cylindrical inner tube (23); The drive unit includes four drive motors (26). The drive motors (26) are installed inside the square housing (32) and electrically connected to the main control platform (7). The output shaft of the drive motor (26) is equipped with a vertical gear (27), which meshes with a horizontal gear (28). The output shafts of two drive motors (26) face the left side wall of the square housing (32), and the output shafts of the other two drive motors (26) face the right side wall of the square housing (32). There are four transverse screws (29), which are installed in pairs on the left and right side walls of the square shell (32). One end of the transverse screw (29) extends out of the side wall of the square shell (32) and is fixed with a support claw (31) at the end. One end of the transverse screw (29) located in the square shell (32) meshes with the transverse gear (28). There are four vertical screws (30), which are installed in pairs on the upper and lower side walls of the square shell (32). One end of the vertical screw (30) extends out of the side wall of the square shell (32) and is fixed with a support claw (31) at the end. One end of the vertical screw (30) located in the square shell (32) meshes with the vertical gear (27).

3. A high-efficiency gas extraction process based on non-solidified sealing materials, using the gas extraction and recovery device as described in claim 1, characterized in that... Includes the following steps: Step 1: Pass the gas extraction pipe (1) through the central hole pipe (16) of the support device (14) and then place it into the borehole. Pass the sealing water bag connected to the water injection pipe (2) through the gap of the support device (14) and place it at both ends of the support device (14). Place the end of the grouting pipe (13) in the gap between the sealing water bag and the support device (14) at the borehole opening. Step 2: Open the water injection and drainage system (5) and inject water into the sealing water bag to the set pressure value to make it expand and play a sealing role. Then close valve a (4) on the water injection pipe and close the water injection and drainage system (5). Step 3: Open the pressure valve (9) on the grouting pipe (13), open the grouting system (8), inject non-solidified sealing grout into the sealing section, and close the pressure valve (9) and the grouting system (8) when the set pressure value is reached. Step 3: Open the gas extraction system (6) to extract gas. The gas extraction system (6) has a built-in gas concentration monitoring module. If the gas concentration decreases, and the pressure valve (9) on the grouting pipe (13) detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system (8) to perform grouting again. After the set pressure value is reached and the extraction concentration reaches (80)% of the initial extraction concentration, close the pressure valve (9) and the grouting system (8) to achieve dynamic sealing. Step 4: After extraction is completed, open valve b (11) on the slurry discharge pipe, open the slurry discharge system (10) to discharge the non-solidified sealing slurry of the sealing section, and then open valve a (4) on the water injection pipe to open the water injection and drainage system (5) to discharge the water inside the sealing water bag; Step 5: Remove the sealing water bag, water injection pipe (2), grouting pipe (13), and grout discharge pipe (12). Use a hook rod to connect the hook hole (18) of the support device (14), remove the support device (14), and then remove the extraction pipe. Clean each device to achieve the recovery of each device.

4. A high-efficiency gas extraction process based on non-solidified sealing materials, using the gas extraction and recovery device as described in claim 2, characterized in that... Includes the following steps: Step 1: Pass the gas extraction pipe (1) through the central hole pipe (16) of the support device (14) and then place it into the borehole. Connect the extraction pipe fixing device (21) to the extraction end of the gas extraction pipe (1). Start the drive motor (26) so that the horizontal screw (29) and the vertical screw (30) extend out of the square shell (32) so that multiple support claws (31) support the inner wall of the borehole to fix the gas extraction pipe (1). Pass the sealing water bag connected to the water injection pipe (2) through the gap of the support device (14) and place it at both ends of the support device (14). Place the end of the grouting pipe (13) in the gap between the sealing water bag and the support device (14) at the borehole opening. Step 2: Open the water injection and drainage system (5) and inject water into the sealing water bag to the set pressure value to make it expand and play a sealing role. Then close valve a (4) on the water injection pipe and close the water injection and drainage system (5). Step 3: Open the pressure valve (9) on the grouting pipe (13), open the grouting system (8), inject non-solidified sealing grout into the sealing section, and close the pressure valve (9) and the grouting system (8) when the set pressure value is reached. Step 3: Open the gas extraction system (6) to extract gas. The gas extraction system (6) has a built-in gas concentration monitoring module. If the gas concentration decreases, and the pressure valve (9) on the grouting pipe (13) detects a decrease in the grout concentration in the sealing section, open the pressure valve and the grouting system (8) to perform grouting again. After the set pressure value is reached and the extraction concentration reaches (80)% of the initial extraction concentration, close the pressure valve (9) and the grouting system (8) to achieve dynamic sealing. Step 4: After extraction is completed, open valve b (11) on the slurry discharge pipe, open the slurry discharge system (10) to discharge the non-solidified sealing slurry of the sealing section, and then open valve a (4) on the water injection pipe to open the water injection and drainage system (5) to discharge the water inside the sealing water bag; Step 5: Remove the sealing water bag, water injection pipe (2), grouting pipe (13), and grout discharge pipe (12). Use a hook rod to connect the hook hole (18) of the support device (14), remove the support device (14), start the drive motor (26) to retract the horizontal screw (29) and vertical screw (30), then remove the gas extraction pipe (1) and extraction pipe fixing device (21), clean each device, and realize the recovery of each device.

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