An integrated intelligent circulating plugging system in a coal mine underground

Abstract

The application discloses a coal mine underground integrated intelligent circulating leak-stopping system, which comprises a single-bag pipeline cleaning and plugging device, a two-plugging-one-injection hole sealing device and an intelligent circulating leak-stopping pump truck, two pipeline fixing sleeves are symmetrically arranged at the left and right ends of the bag of the single-bag pipeline cleaning and plugging device, the right ends of a leak-stopping pipe and a water injection cleaning pipe are connected with a leak-stopping and cleaning conversion valve, the right end outlet of the leak-stopping and cleaning conversion valve is arranged in a fissure sealing section, and the left end of the leak-stopping pipe is connected with the intelligent circulating leak-stopping pump truck. The leak-stopping and cleaning conversion valve is used for realizing the circulating operation of leak-stopping and cleaning of the fissure sealing section, timely cleaning of the leak-stopping pipe can effectively prevent the leak-stopping pipe from being blocked, the grouting leak-stopping effect is greatly improved, meanwhile, the automatic control of the circulating grouting leak-stopping is realized through the intelligent controller, the working strength is reduced, the working failure in the leak-stopping grouting work is reduced, the normal grouting leak-stopping work is ensured, and the leak-stopping effect and the leak-stopping efficiency are further improved.

Description

Technical Field

[0001] This utility model belongs to the field of gas extraction sealing and intelligent leak plugging technology, specifically, it relates to an integrated intelligent circulation leak plugging system for underground coal mines. Background Technology

[0002] The sealing quality of gas drainage boreholes is a key factor affecting the gas drainage effect. Under the combined effect of ground stress and gas pressure, the surrounding rock fissures of the borehole continue to develop. Even if the initial sealing can seal the borehole with high quality, it is impossible to avoid the development of fissures in the later stage, which will lead to gas leakage during gas drainage. Therefore, dynamic plugging is particularly important throughout the service cycle of gas drainage boreholes.

[0003] Existing grouting methods for sealing leaks mostly employ secondary grouting and dynamic grouting, which involves grouting to seal the fissures in the surrounding rock after the initial borehole sealing, thereby further increasing the gas extraction concentration. However, these existing sealing methods still have the following problems:

[0004] (1) It is impossible to intelligently determine the migration state of grout in the crack during the grouting process, and it is difficult to determine the appropriate grouting rate and grouting pressure. On-site practical operation relies on experience judgment, which often leads to problems such as grout leakage and insufficient grouting.

[0005] (2) The service cycle of a gas drainage borehole is generally more than 6 months. It is difficult to meet the needs of high-quality drainage for a long time if only one rock fissure sealing grouting is performed on the gas drainage borehole. Therefore, dynamic grouting is required for the rock fissures of the borehole.

[0006] (3) In terms of dynamic grouting of the surrounding rock fissures in boreholes, the dynamic adjustment time is relatively long. If it does not rely on automation and intelligent technologies, it will be costly and have low adjustment accuracy if it relies solely on manual labor. At present, there is a lack of intelligent circulating plugging technology equipment.

[0007] Therefore, there is an urgent need to develop an integrated intelligent circulating leak sealing system for underground coal mines that is simple in structure, easy to operate, low in cost, high in precision, and has a good leak sealing and grouting effect, in order to meet the needs of actual use. Utility Model Content

[0008] The purpose of this invention is to provide an integrated intelligent circulating leak sealing system for underground coal mines that is simple in structure, easy to operate, low in cost, high in precision, and has a good leak sealing and grouting effect, so as to meet the needs of actual use.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An integrated intelligent circulation plugging system for underground coal mines includes a single-bag pipeline cleaning and plugging device, a two-plug-one-injection sealing device, and an intelligent circulation plugging pump truck. Both the single-bag pipeline cleaning and plugging device and the two-plug-one-injection sealing device are horizontally installed in the extraction hole. The single-bag pipeline cleaning and plugging device is installed on the side closest to the hole opening, and a crack plugging section is formed between the single-bag pipeline cleaning and plugging device and the two-plug-one-injection sealing device.

[0011] The single-bag pipeline cleaning and plugging device includes a bag, a gas extraction pipe, a grouting pipe, a plugging pipe, a water injection cleaning pipe, and a plugging and cleaning conversion valve. Two pipeline fixing sleeves are symmetrically arranged at the left and right ends of the bag. The gas extraction pipe, grouting pipe, plugging pipe, and water injection cleaning pipe all pass through the two pipeline fixing sleeves. The right end of the gas extraction pipe is connected to the extraction pipe of the two-plug-one-injection sealing device through an adapter. The right end of the grouting pipe is connected to the grouting pipe of the two-plug-one-injection sealing device. The right ends of the plugging pipe and the water injection cleaning pipe are both connected to the plugging and cleaning conversion valve. The right outlet of the plugging and cleaning conversion valve is located in the crack plugging section. The left end of the plugging pipe is connected to the intelligent circulating plugging pump truck.

[0012] The leak-stopping and cleaning conversion valve includes a valve body, a slider, a spring, a water inlet, a slurry inlet, and a slurry outlet. The valve body is arranged horizontally to the left and right. The water inlet is located at the left end of the valve body, and the slurry outlet is located at the right end of the valve body. The slider is slidably mounted inside the valve body. The left end of the spring is connected to the right end of the slider, and the right end of the spring is located on the inner wall of the right side of the valve body. In the initial state, the slider is located at the left end of the valve body to block the water inlet, and the slurry inlet is located on the outer surface of the valve body, with the slurry inlet located to the right of the slider. The water inlet of the valve body is connected to the outlet end of the water injection cleaning pipe, and the slurry inlet of the valve body is connected to the outlet end of the leak-stopping pipe.

[0013] The pipeline fixing sleeve includes a horizontally arranged and closed cylinder. The left and right inner walls of the cylinder are respectively provided with extraction pipe holes, grouting pipe holes, leak plugging pipe holes and water injection cleaning pipe holes. The extraction pipe holes, grouting pipe holes, leak plugging pipe holes and water injection cleaning pipe holes are all eccentrically arranged.

[0014] The intelligent circulating plugging pump truck includes a mobile base, on which are mounted an intelligent controller, a pneumatic slurry mixing tank, and a slurry storage tank. The intelligent controller is located at the left end of the mobile base, the pneumatic slurry mixing tank at the right end, and the slurry storage tank between the intelligent controller and the pneumatic slurry mixing tank. The outlet of the pneumatic slurry mixing tank is connected to the inlet of the slurry storage tank, and an outlet valve is installed on the outlet of the pneumatic slurry mixing tank. A pneumatic plunger pump is installed on the slurry storage tank, and a solenoid valve is installed on the pneumatic plunger pump. The air inlet of the solenoid valve is connected to the first branch of the connecting air pipe. The left end of the connecting air pipe is connected to the downhole air supply system, and the two second branch air pipes of the connecting air pipe are connected to the pneumatic slurry mixing tank.

[0015] The pneumatic slurry mixing tank includes a tank body and a tank cover. The tank cover is equipped with a pneumatic motor, a water / material inlet, and a pressurized air inlet valve. The water / material inlet and the pressurized air inlet valve are respectively located on both sides of the pneumatic motor. The pneumatic motor is equipped with a motor air inlet valve. A stirring rod is located below the tank cover, and the top of the stirring rod is connected to the output shaft of the pneumatic motor. A liquid outlet is located on the lower side wall of the tank body, and a liquid outlet valve is located on the liquid outlet. A liquid level sensor is located at the bottom of the tank body, and at least three support legs are located at the bottom of the tank body. Several locking components are installed between the tank body and the tank cover.

[0016] The locking assembly includes a first ear plate and a second ear plate disposed opposite to each other on the outer wall of the barrel. A locking stud is disposed between the first ear plate and the second ear plate. The bottom end of the locking stud extends outward symmetrically with a first extension and a second extension. The first extension is inserted into the ear plate hole of the first ear plate, and the second extension is inserted into the ear plate hole of the second ear plate. The barrel lid is provided with a locking hole corresponding to the locking stud. The top end of the locking stud passes through the locking hole and is locked by an annular nut.

[0017] The pneumatic plunger pump includes a pump body, the lower end of which is inserted into a slurry storage tank. The air inlet end of the pump body is equipped with a plunger pump air inlet valve, and the air inlet of the plunger pump air inlet valve is equipped with a solenoid valve. The slurry outlet end of the pump body is equipped with a plunger pump slurry outlet valve. The outlet of the slurry outlet valve is connected to the left end of the plugging pipe, and a flow meter and a grouting pressure sensor are installed between the outlet of the slurry outlet valve and the left end of the plugging pipe.

[0018] The intelligent controller includes a battery, a PLC controller, and a display screen. The PLC controller has several wiring ports on its side, which are connected to a liquid level sensor, a solenoid valve, a flow meter, and a grouting pressure sensor via several connecting wires.

[0019] Steel rings are installed at both ends of the bag and the pipeline fixing sleeve for fixation.

[0020] The orifice of the extraction hole is equipped with a multi-parameter sensor, which is connected to the PLC controller via a sensor connection cable.

[0021] This application features a simple structure and convenient operation. It achieves cyclical operation of plugging and cleaning of the crack sealing section through a plugging and cleaning conversion valve. Timely cleaning of the plugging pipe can effectively prevent blockage and greatly improve the grouting and plugging effect. At the same time, the intelligent controller realizes automatic control of cyclic grouting and plugging, reduces workload, reduces work errors in plugging and grouting, ensures the normal progress of grouting and plugging work, and further improves the plugging effect and efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the single-bag pipeline cleaning and sealing device of this utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the pipeline fixing sleeve of this utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the leak-stopping and cleaning switching valve of this utility model.

[0026] Figure 5 This is a structural schematic diagram of the intelligent circulating leak-sealing pump truck of this utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the intelligent controller of this utility model.

[0028] Figure 7 This is a schematic diagram of the structure of the pneumatic plunger pump of this utility model.

[0029] Figure 8 This is a schematic diagram of the structure of the pneumatic slurry mixing tank of this utility model. Detailed Implementation

[0030] like Figures 1-8 As shown, an integrated intelligent circulation plugging system for underground coal mines includes a single-bag pipeline cleaning and plugging device 26, a two-plug-one-injection sealing device 27, and an intelligent circulation plugging pump truck 25. The single-bag pipeline cleaning and plugging device 26 and the two-plug-one-injection sealing device 27 are both horizontally arranged in the extraction hole. The single-bag pipeline cleaning and plugging device 26 is arranged on the side close to the hole opening, and a crack plugging section 21 is formed between the single-bag pipeline cleaning and plugging device 26 and the two-plug-one-injection sealing device 27.

[0031] The single-bag pipeline cleaning and plugging device 26 includes a bag 6, a gas extraction pipe 1, a grouting pipe 2, a plugging pipe 3, a water injection cleaning pipe 4, and a plugging and cleaning conversion valve 5. Two pipeline fixing sleeves 7 are symmetrically arranged at the left and right ends of the bag 6. The gas extraction pipe 1, the grouting pipe 2, the plugging pipe 3, and the water injection cleaning pipe 4 all pass through the two pipeline fixing sleeves 7. The right end of the gas extraction pipe 1 is connected to the extraction pipe of the two-plug-one-injection sealing device 27 through an adapter 9. The right end of the grouting pipe 2 is connected to the grouting pipe 2 of the two-plug-one-injection sealing device 27. The right ends of the plugging pipe 3 and the water injection cleaning pipe 4 are both connected to the plugging and cleaning conversion valve 5. The right end outlet of the plugging and cleaning conversion valve 5 is located in the crack sealing section 21. The left end of the plugging pipe 3 is connected to the intelligent circulating plugging pump truck 25. Steel rings 8 are installed between the left and right ends of the bag 6 and the pipe fixing sleeves 7 for fixing. The positions of the four pipes are fixed by the two pipe fixing sleeves 7. The left and right ends of the bag 6 are placed on the two pipe fixing sleeves 7 respectively, and the bag 6 is fixed by the steel rings 8.

[0032] The leak-stopping and cleaning conversion valve 5 includes a valve body 506, a slider 504, a spring 505, a water inlet 501, a slurry inlet 502, and a slurry outlet 503. The valve body 506 is arranged horizontally to the left and right. The water inlet 501 is located at the left end of the valve body 506, and the slurry outlet 503 is located at the right end of the valve body 506. The slurry outlet 503 can only discharge slurry in one direction. The slider 504 is slidably arranged inside the valve body 506. The left end of the spring 505 is connected to the right end of the slider 504, and the right end of the spring 505 is located on the right inner wall of the valve body 506. The slurry inlet 502 is located on the outer surface of the valve body 506, and the slurry inlet 502 is initially located to the right of the slider 504. The water inlet 501 of the valve body 506 is connected to the water outlet of the water injection cleaning pipe 4, and the slurry inlet 502 of the valve body 506 is connected to the slurry outlet of the leak-stopping pipe 3. During grouting to seal leaks, viscous liquid is injected into the sealing pipe 3. The viscous liquid flows through the grout inlet 502 into the inner cavity of the valve body 506, and then flows out from the outlet 503. In the initial state, the spring 505 presses the slider 504 to the left. The slider 504 is located at the left end of the valve body 506 to block the water inlet, ensuring that the viscous liquid does not flow out from the water inlet 501, thus sealing the crack. When the sealing is completed and the pipeline needs to be cleaned, water is injected into the water injection cleaning pipe 4. The water flows into the inner cavity of the valve body 506 through the water inlet 501. Under the action of water pressure, the slider 504 compresses the spring 505 and moves to the right. Due to the obstruction of the slider 504, the water can only flow out from the grout inlet 502 and into the sealing pipe 3, thereby achieving the effect of cleaning the pipeline. After a certain period of time, the water supply is stopped, and the slider 504 returns to the initial position under the action of the spring 505, so that the grouting cycle can continue.

[0033] The pipeline fixing sleeve 7 includes a horizontally arranged and left-right closed cylinder. The left and right inner walls of the cylinder are respectively provided with an extraction pipe hole 701, a grouting pipe hole 702, a leak-sealing pipe hole 703 and a water injection cleaning pipe hole 704. The extraction pipe hole 701, the grouting pipe hole 702, the leak-sealing pipe hole 703 and the water injection cleaning pipe hole 704 are all eccentrically arranged.

[0034] The intelligent circulating plugging pump truck 25 includes a mobile base 10, on which are mounted an intelligent controller 11, a pneumatic slurry mixing tank 14, and a slurry storage tank 12. The intelligent controller 11 is located at the left end of the mobile base 10, the pneumatic slurry mixing tank 14 is located at the right end of the mobile base 10, and the slurry storage tank 12 is located between the intelligent controller 11 and the pneumatic slurry mixing tank 14. The outlet of the pneumatic slurry mixing tank 14 is connected to the inlet of the slurry storage tank 12, and an outlet valve is provided on the outlet of the pneumatic slurry mixing tank 14. A pneumatic plunger pump 13 is mounted on the slurry storage tank 12, and a solenoid valve 18 is provided on the pneumatic plunger pump 13. The air inlet of the solenoid valve 18 is connected to the first branch of the connecting air pipe 15. The left end of the connecting air pipe 15 is connected to the downhole air supply system, and the two second branch air pipes of the connecting air pipe 15 are connected to the pneumatic slurry mixing tank 14.

[0035] The pneumatic slurry mixing tank 14 includes a tank body and a tank cover. The tank cover is equipped with a pneumatic motor 1401, a water / material inlet 1404, and a booster air inlet valve 1405. The water / material inlet 1404 and the booster air inlet valve 1405 are respectively located on both sides of the pneumatic motor 1401. The pneumatic motor 1401 is equipped with a motor air inlet valve 1402. A stirring rod 1406 is located below the tank cover. The top of the stirring rod 1406 is connected to the output shaft of the pneumatic motor 1401. A liquid outlet 1407 is located on the lower side wall of the tank body. A liquid outlet valve is located on the liquid outlet 1407. A liquid level sensor 1408 is located at the bottom of the tank body. At least three support legs 1409 are located at the bottom of the tank body. Several locking components are provided between the tank body and the tank cover.

[0036] The connecting air pipe 15 is connected to the air inlet of the solenoid valve 18 through the first branch air pipe 1501, and the connecting air pipe 15 is connected to the motor air inlet valve 1402 and the booster air inlet valve 1405 through two second branch air pipes 1502.

[0037] The locking assembly includes a first ear plate 1411 and a second ear plate 1412 disposed opposite to each other on the outer wall of the barrel. A locking stud 1410 is disposed between the first ear plate 1411 and the second ear plate 1412. The bottom end of the locking stud 1410 extends outward symmetrically with a first extension and a second extension. The first extension is inserted into the ear plate hole of the first ear plate 1411, and the second extension is inserted into the ear plate hole of the second ear plate 1412. The barrel lid is provided with a locking hole corresponding to the locking stud 1410. The top end of the locking stud 1410 passes through the locking hole and is locked by an annular nut 1413.

[0038] The pneumatic plunger pump 13 includes a pump body 1301, the lower end of which is inserted into the slurry storage tank 12. A plunger pump inlet valve 1302 is provided at the air inlet end of the pump body 1301, and a solenoid valve 18 is provided at the air inlet of the plunger pump inlet valve 1302. A plunger pump outlet valve 1303 is provided at the slurry outlet end of the pump body 1301. The outlet of the outlet valve is connected to the left end of the plugging pipe 3, and a flow meter and a grouting pressure sensor are installed between the outlet of the outlet valve and the left end of the plugging pipe. The pneumatic plunger pump 13 is mounted on the slurry storage tank 12 by a fixing nut 17.

[0039] The intelligent controller 11 includes a battery 1101, a PLC controller 1102, and a display screen 1104. The PLC controller 1102 has several wiring ports 1103 on its side. These ports 1103 are connected to a liquid level sensor 1408, a solenoid valve 18, a flow meter 19, and a grouting pressure sensor 20 via several connecting cables 16, or they can be connected via signal lines. All monitoring data is displayed on the display screen 1104.

[0040] The orifice of the extraction hole is equipped with an orifice multi-parameter sensor 24. The orifice multi-parameter sensor 24 measures parameters including gas concentration, flow rate and orifice negative pressure. The orifice multi-parameter sensor 24 is connected to the PLC controller 1102 via sensor connection cable 23, or it can be connected via signal.

[0041] In this application, when sealing and plugging gas drainage boreholes downhole, the grouting pipes and drainage pipes of the single-bag pipeline cleaning and plugging device 26 and the two-plug-one-injection sealing device 27 are first connected through corresponding joints and inserted into the designated position in the borehole. Grout is injected into the grouting pipe 2, causing the three bags of the single-bag pipeline cleaning and plugging device 26 and the two-plug-one-injection sealing device 27 assembly to inflate, and the area between the two bags of the two-plug-one-injection sealing device 27 is fully grouted. The orifice multi-parameter sensor 24 is installed on the orifice extraction pipe, and the left end of the plugging pipe 3 is connected to the slurry outlet valve 1303 of the pneumatic plunger pump 13 on the intelligent circulating plugging pump truck 25. The left end of the connecting air pipe 15 on the pump truck is connected to the downhole air supply system. Then, the plugging material and water are injected into the pneumatic slurry mixing tank 14 through the feed port. The motor air inlet valve 1402 is opened, and the gas enters the pneumatic motor 1401. The pneumatic motor 1401 drives the stirring rod 1. 406 Rotate; after the sealing material and water are mixed evenly, open the liquid outlet valve 1407 and the booster air inlet valve 1405. Under air pressure, the viscous liquid flows into the slurry storage tank 12; then open the plunger pump air inlet valve 1302, and the pneumatic plunger pump 13 starts to run. The viscous liquid flows from the pump body 1301 through the plunger pump slurry outlet valve 1303 into the plugging pipe 3, and then flows through the grouting and cleaning conversion valve 5 to reach the crack sealing section 21, where the crack is sealed and the sealing is completed. When the pipeline needs cleaning, water is injected into the water injection cleaning pipe 4. The water flows into the inner cavity of the valve body 506 through the water inlet 501. Under the action of water pressure, the slider 504 compresses the spring 505 and moves to the right. Due to the obstruction of the slider 504, the water flows out from the grout inlet 502 and into the leak-sealing pipe 3, thereby achieving the function of cleaning the leak-sealing pipe 3. After a certain period of time, the water supply is stopped, and the slider 504 returns to the initial position under the action of the spring 505, so that the grouting can continue to circulate.

[0042] This application features a simple structure and convenient operation. The leak-sealing and cleaning conversion valve 5 enables the cyclical operation of leak sealing in the crack sealing section 21 and pipeline cleaning. Timely cleaning of the leak-sealing pipe 3 can effectively prevent blockage of the leak-sealing pipe 3, greatly improving the grouting and leak-sealing effect. At the same time, the intelligent controller 11 realizes automatic control of cyclic grouting and leak sealing, reducing workload, minimizing work errors in the leak sealing and grouting process, ensuring the normal progress of the grouting and leak sealing work, and further improving the leak sealing effect and efficiency.

[0043] It should be noted that the liquid level sensor 1408, solenoid valve 18, flow meter 19, grouting pressure sensor 20, battery 1101, PLC controller 1102, display screen 1104, and orifice multi-parameter sensor 24 mentioned in this application are all commercially available products. This application seeks protection for the structure of the single-bag pipeline cleaning and sealing device 26, the structure of the leak-sealing and cleaning conversion valve 5, and the positional and connection relationships between the various components of the leak-sealing system. The automatic control involved in this application can achieve its complete function using conventional computer programs and does not involve new computer programs (improvements to conventional computer programs).

[0044] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated intelligent circulation plugging system for underground coal mines, characterized in that: It includes a single-bag pipeline cleaning and plugging device, a two-plug-one-injection sealing device, and an intelligent circulating leak plugging pump truck. Both the single-bag pipeline cleaning and plugging device and the two-plug-one-injection sealing device are horizontally installed in the extraction hole. The single-bag pipeline cleaning and plugging device is installed on the side closest to the hole opening, and a crack plugging section is formed between the single-bag pipeline cleaning and plugging device and the two-plug-one-injection sealing device. The single-bag pipeline cleaning and plugging device includes a bag, a gas extraction pipe, a grouting pipe, a plugging pipe, a water injection cleaning pipe, and a plugging and cleaning conversion valve. Two pipeline fixing sleeves are symmetrically arranged at the left and right ends of the bag. The gas extraction pipe, grouting pipe, plugging pipe, and water injection cleaning pipe all pass through the two pipeline fixing sleeves. The right end of the gas extraction pipe is connected to the extraction pipe of the two-plug-one-injection sealing device through an adapter. The right end of the grouting pipe is connected to the grouting pipe of the two-plug-one-injection sealing device. The right ends of the plugging pipe and the water injection cleaning pipe are both connected to the plugging and cleaning conversion valve. The right outlet of the plugging and cleaning conversion valve is located in the crack plugging section. The left end of the plugging pipe is connected to the intelligent circulating plugging pump truck.

2. The integrated intelligent circulation plugging system for underground coal mines according to claim 1, characterized in that: The leak-stopping and cleaning conversion valve includes a valve body, a slider, a spring, a water inlet, a slurry inlet, and a slurry outlet. The valve body is arranged horizontally to the left and right. The water inlet is located at the left end of the valve body, and the slurry outlet is located at the right end of the valve body. The slider is slidably mounted inside the valve body. The left end of the spring is connected to the right end of the slider, and the right end of the spring is located on the inner wall of the right side of the valve body. In the initial state, the slider is located at the left end of the valve body to block the water inlet, and the slurry inlet is located on the outer surface of the valve body, with the slurry inlet located to the right of the slider. The water inlet of the valve body is connected to the outlet end of the water injection cleaning pipe, and the slurry inlet of the valve body is connected to the outlet end of the leak-stopping pipe.

3. The integrated intelligent circulation plugging system for underground coal mines according to claim 2, characterized in that: The pipeline fixing sleeve includes a horizontally arranged and closed cylinder. The left and right inner walls of the cylinder are respectively provided with extraction pipe holes, grouting pipe holes, leak plugging pipe holes and water injection cleaning pipe holes. The extraction pipe holes, grouting pipe holes, leak plugging pipe holes and water injection cleaning pipe holes are all eccentrically arranged.

4. The integrated intelligent circulation plugging system for underground coal mines according to claim 3, characterized in that: The intelligent circulating plugging pump truck includes a mobile base, on which are mounted an intelligent controller, a pneumatic slurry mixing tank, and a slurry storage tank. The intelligent controller is located at the left end of the mobile base, the pneumatic slurry mixing tank at the right end, and the slurry storage tank between the intelligent controller and the pneumatic slurry mixing tank. The outlet of the pneumatic slurry mixing tank is connected to the inlet of the slurry storage tank, and an outlet valve is installed on the outlet of the pneumatic slurry mixing tank. A pneumatic plunger pump is installed on the slurry storage tank, and a solenoid valve is installed on the pneumatic plunger pump. The air inlet of the solenoid valve is connected to the first branch of the connecting air pipe. The left end of the connecting air pipe is connected to the downhole air supply system, and the two second branch air pipes of the connecting air pipe are connected to the pneumatic slurry mixing tank.

5. The integrated intelligent circulation plugging system for underground coal mines according to claim 4, characterized in that: The pneumatic slurry mixing tank includes a tank body and a tank cover. The tank cover is equipped with a pneumatic motor, a water / material inlet, and a pressurized air inlet valve. The water / material inlet and the pressurized air inlet valve are respectively located on both sides of the pneumatic motor. The pneumatic motor is equipped with a motor air inlet valve. A stirring rod is located below the tank cover, and the top of the stirring rod is connected to the output shaft of the pneumatic motor. A liquid outlet is located on the lower side wall of the tank body, and a liquid outlet valve is located on the liquid outlet. A liquid level sensor is located at the bottom of the tank body, and at least three support legs are located at the bottom of the tank body. Several locking components are installed between the tank body and the tank cover.

6. The integrated intelligent circulation plugging system for underground coal mines according to claim 5, characterized in that: The locking assembly includes a first ear plate and a second ear plate disposed opposite to each other on the outer wall of the barrel. A locking stud is disposed between the first ear plate and the second ear plate. The bottom end of the locking stud extends outward symmetrically with a first extension and a second extension. The first extension is inserted into the ear plate hole of the first ear plate, and the second extension is inserted into the ear plate hole of the second ear plate. The barrel lid is provided with a locking hole corresponding to the locking stud. The top end of the locking stud passes through the locking hole and is locked by an annular nut.

7. The integrated intelligent circulation plugging system for underground coal mines according to claim 6, characterized in that: The pneumatic plunger pump includes a pump body, the lower end of which is inserted into a slurry storage tank. The air inlet end of the pump body is equipped with a plunger pump air inlet valve, and the air inlet of the plunger pump air inlet valve is equipped with a solenoid valve. The slurry outlet end of the pump body is equipped with a plunger pump slurry outlet valve. The outlet of the slurry outlet valve is connected to the left end of the plugging pipe, and a flow meter and a grouting pressure sensor are installed between the outlet of the slurry outlet valve and the left end of the plugging pipe.

8. The integrated intelligent circulation plugging system for underground coal mines according to claim 7, characterized in that: The intelligent controller includes a battery, a PLC controller, and a display screen. The PLC controller has several wiring ports on its side, which are connected to a liquid level sensor, a solenoid valve, a flow meter, and a grouting pressure sensor via several connecting wires.

9. The integrated intelligent circulation plugging system for underground coal mines according to claim 8, characterized in that: Steel rings are installed at both ends of the bag and the pipeline fixing sleeve for fixation.

10. The integrated intelligent circulation plugging system for underground coal mines according to claim 9, characterized in that: The orifice of the extraction hole is equipped with a multi-parameter sensor, which is connected to the PLC controller via a sensor connection cable.

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