Paste filling, repairing and reinforcing equipment for filling treatment of coal mine goaf

Abstract

The invention discloses paste filling, repairing and reinforcing equipment for filling treatment of a coal mine goaf, and the equipment comprises a mounting support which is detachably mounted on a rack, and a transmission frame is horizontally fixed on the mounting support; the adjusting part is mounted on the conveying frame in a sliding manner; the pneumatic pressing rod assembly is horizontally arranged on one side of the adjusting part, and the pneumatic pressing rod assembly is used for providing stable and continuous pressure output for a filling area where paste filling is preliminarily completed in the mine recovery area and forming an expanding hole with a reinforcing function in the filling area so that follow-up supplementary feeding of newly-filled paste can be facilitated; and the turning assembly is installed on the adjusting part, and one end of the pneumatic pressing rod assembly is connected with the turning assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of mine production, and particularly relates to a paste filling repair and reinforcement device for the filling treatment of a coal mine goaf. Background Art

[0002] The filling mining method belongs to an advanced artificial support mining technology, and is particularly suitable for occasions where strict control of surface subsidence, maintaining the stability of surrounding rock layers and improving operation safety are required during underground mining. Its core lies in precisely controlling and managing the paste injection into the mining goaf to support the surrounding rock layers and prevent collapse and surface subsidence. The implementation of the filling mining method not only improves the mining efficiency, but also greatly reduces the environmental and ground structure impacts, which is an important technological progress in modern mining engineering; currently, after the construction of the mine goaf is completed, manual evaluation and construction methods are mostly used for the paste filling of the goaf, and it is directly put into use after the paste filling construction in the goaf is completed. Since its stability and pressure-bearing capacity directly affect the stability of the overlying rock layers and the safety of subsequent mining operations, and in most working conditions, there is a lack of effective monitoring and intelligent construction repair measures for the filling area. Over time, goaf settlement, cracks or even collapses may occur, seriously affecting the safe operation of the mine; Therefore, it is necessary to provide a paste filling repair and reinforcement device for the filling treatment of a coal mine goaf to solve the problems raised in the above background art. Summary of the Invention

[0003] To achieve the above object, the present invention provides the following technical solution: A paste filling repair and reinforcement device for the filling treatment of a coal mine goaf, which includes: An installation support, detachably installed on the frame, and a transmission frame is horizontally fixed on the installation support; An adjustment part, slidably installed on the transmission frame; A pneumatic pressure rod assembly, horizontally arranged on one side of the adjustment part, and the pneumatic pressure rod assembly is used to provide a stable and continuous pressure output to the filling area where the paste filling in the mine stoping area is initially completed, and form a tightening hole with a strengthening effect inside the filling area for subsequent supplementary feeding of new filling paste; A turning component, installed on the adjustment part, one end of the pneumatic pressure rod assembly is connected to the turning component, and the turning component can provide displacement guidance to the pneumatic pressure rod assembly after the pneumatic pressure rod assembly partially penetrates into the filling area; The pneumatic pressure rod assembly forms an upwardly curved arc-shaped displacement trajectory through the drive of the support arm in the turning component, so as to form an elongated tightening hole with an arc-shaped cross-section in the corresponding filling area.

[0004] Further, preferably, a plurality of stress sensors are evenly distributed in the filling area, and a vibration simulator is placed at the working face of the mining area. The vibration simulator is used to simulate the vibration effect generated during the mining work in the mining area; A data transmission module is arranged on the mounting support. The data transmission module collects the stress distribution data of the filling area detected by the stress sensors in real time. An evaluation module is arranged outside the data transmission module. The evaluation module evaluates the structural stability of the filling area based on the obtained stress distribution data of the filling area and identifies the stress concentration area, so as to guide the pneumatic pressure rod assembly to reinforce and repair the defective position of the filling area subsequently.

[0005] Further, preferably, the turning component includes: Two parallel plates are arranged left and right. Both of the two plates are fixed on one side of the adjusting part. A shaft tube is rotatably connected in the plates; A support arm is rotatably connected to one side of the plate. The support arm is fixed to one end of the shaft tube, and a main pulley and a secondary pulley are rotatably connected in the support arm. The main pulley and the shaft tube are concentrically arranged; An inner driving rod is rotatably connected in the shaft tube. One end of the inner driving rod is fixed to the main pulley. A driving part is arranged on one side of the adjusting part. The output end of the driving part is fixed to the inner driving rod; A transmission belt is connected between the main pulley and the secondary pulley. One end of the pneumatic pressure rod assembly is fixed to the secondary pulley.

[0006] Further, preferably, a gear is sleeved on the shaft tube between the two plates. A rack plate is slidably connected to the plate. The rack plate is meshed with the gear for transmission. An electric telescopic rod is arranged on the plate. The telescopic end of the electric telescopic rod is fixed to the rack plate; The rotation angle range of the support arm driven by gear meshing is between -50° and 220°.

[0007] Further, preferably, the support arm is set as a two-section structure, and the upper section arm of the support arm is slidably connected to the lower section arm of the support arm through a limiting rod. The secondary pulley is rotatably connected to the upper section arm; A tension pulley is installed on the lower section arm of the support arm. The tension pulley is in rolling contact with the surface of the transmission belt.

[0008] Further, preferably, the pneumatic pressure rod assembly includes: A stamping rod is rotatably connected to the support arm in the turning component. An inner cavity is arranged in the stamping rod; A vibration guiding mechanism is arranged in the inner cavity. A vibration guiding rod is slidably arranged in the inner cavity. One end of the vibration guiding mechanism is connected to the vibration guiding rod; The inner shaft head is slidably connected to one end of the stamping rod, and the inner shaft head is fixed to the other end of the vibration guiding rod; The external sleeve is detachably installed on the inner shaft head; The air flow seat is fixed on the support arm in the turning component. A central air cavity is arranged in the air flow seat. A sealing sleeve is rotatably connected to one side of the air flow seat. One end of the sealing sleeve is fixed to the stamping rod and is communicated with the inner cavity in the stamping rod.

[0009] Further, preferably, the vibration guiding mechanism includes: The inner cylinder tube has a pneumatic plug column slidably connected inside it. There are two reinforcing rods fixed to one side of the pneumatic plug column, and one end of the reinforcing rod is connected to the vibration guiding rod; The positioning sleeve is coaxially fixed on the side of the inner cylinder tube away from the vibration guiding rod. A first pulse chamber is sealed between the positioning sleeve and the pneumatic plug column; The isolation seat is hermetically fixed in the inner cavity of the stamping rod. A communication cavity is arranged in the isolation seat, and a branch air duct is arranged outside the communication cavity; a second pulse chamber is sealed between the inner cylinder tube and the pneumatic plug column, and an air flow channel is arranged in the pneumatic plug column. The communication cavity is connected to the second pulse chamber through the air flow channel; The sealing air ring is rotatably sleeved outside the stamping rod. One end of the sealing air ring is fixed to the support arm in the turning component. An external air duct is radially arranged on the positioning sleeve, and one end of the external air duct penetrates and is fixed on the side wall of the stamping rod and is communicated with the sealing air ring.

[0010] Further, preferably, pulse tubes are connected to both the air flow seat and the sealing air ring, and the two pulse tubes are continuously and intermittently matched.

[0011] Further, preferably, a centrifugal vibrator is arranged in the inner shaft head.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, mining operation vibration simulation can be carried out on the filling area formed after the initial paste filling is completed, so as to obtain the internal stress change distribution in the filling area. Then, through the pneumatic pressing rod assembly and the turning component, the defect positions in the filling area are reinforced and repaired. On the one hand, the filling compactness of the defect positions can be enhanced, and on the other hand, an elongated and expanded tightening hole with an arc cross-section can be formed in the stress concentration area. Subsequently, the elongated and expanded tightening hole is filled with paste for the second time, so as to more effectively disperse the internal stress, reduce the local stress concentration phenomenon, thereby improving the overall stability and firmness of the filling area, enhancing the support ability for the overlying rock formation and the overall pressure-bearing performance. Description of the Drawings

[0014] Figure 1 Structural schematic diagram of the present invention; Figure 2 Structural schematic diagram of the turning component in the present invention; Figure 3 Cross-sectional view of the turning component in the present invention; Figure 4 Structural schematic diagram of the pneumatic pressing rod component in the present invention; Figure 5 Structural schematic diagram of the vibration guiding mechanism in the present invention; Figure 6 is Figure 5 Enlarged schematic view at position A in; In the figure: 1. Installation support; 11. Transmission frame; 12. Adjusting part; 2. Turning component; 21. Frame plate; 22. Support arm; 23. Shaft tube; 24. Driving part; 25. Gear; 26. Rack plate; 27. Electric telescopic rod; 28. Limit rod; 29. Tension pulley; 3. Pneumatic pressing rod component; 31. Pressing rod; 32. Vibration guiding rod; 33. Inner shaft head; 34. External sleeve; 35. Air flow seat; 4. Vibration guiding mechanism; 41. Inner cylinder tube; 42. Pneumatic plug; 43. Reinforcing rod; 44. Positioning sleeve; 45. External air duct; 5. Isolation seat; 51. First pulse chamber; 52. Second pulse chamber; 53. Communication cavity; 6. Sealing air ring. Specific implementation manner

[0015] Please refer to Figures 1 - 6 , in the embodiment of the present invention, a paste filling repair and reinforcement device for coal mine goaf filling treatment includes: Installation support 1, detachably installed on the frame, and a transmission frame 11 is horizontally fixed on the installation support 1; Adjusting part 12, slidably installed on the transmission frame 11; Pneumatic pressing rod component 3, horizontally arranged on one side of the adjusting part 12, and the pneumatic pressing rod component 3 is used to provide stable and continuous pressure output to the filling area where paste filling is initially completed in the mine stoping area, and form a tightening hole with a reinforcing effect inside the filling area for subsequent supplementary feeding of new filling paste; Turning component 2, installed on the adjusting part 12, one end of the pneumatic pressing rod component 3 is connected to the turning component 2, and the turning component 2 can provide displacement guidance for the pneumatic pressing rod component 3 after the pneumatic pressing rod component 3 partially penetrates into the filling area; that is, for the construction and repair of the defective position in the paste filling area, the pneumatic pressing rod component gradually penetrates from the surface of the filling area into its interior, so as to effectively enhance the filling compactness of the defective position. And compared with some traditional construction methods, the pneumatic pressing rod component works more gently, which can reduce the additional disturbance and damage to the stable structure around the filling area and is beneficial to maintaining the integrity and safety of the overall structure; The pneumatic pressure rod assembly 3 forms an arc-shaped displacement trajectory with an upward bend through the support arm 22 of the rotation and adjustment assembly 2, thereby forming an elongated and tightened hole with an arc-shaped cross-section in the filling area. On the one hand, it can enhance the compactness of the paste filling inside the filling area. On the other hand, new paste materials can be filled into the elongated and tightened hole subsequently. At this time, the arc-shaped reinforcement structure formed can more effectively disperse the internal stress and reduce the phenomenon of local stress concentration, especially applicable in areas with highly concentrated stress.

[0016] In this embodiment, a plurality of stress sensors are evenly distributed in the filling area, and a vibration simulator (not shown in the figure) is placed at the working face of the mining area. The vibration simulator is used to simulate the vibration effect generated during the mining work in the mining area, which belongs to the prior art and will not be elaborated here. A data transmission module is provided on the mounting support 1. The data transmission module collects the stress distribution data detected by the stress sensors in real time. An evaluation module is provided outside the data transmission module. The evaluation module evaluates the structural stability of the filling area based on the obtained stress distribution data of the filling area and identifies the stress concentration areas, so as to guide the pneumatic pressure rod assembly 3 to reinforce and repair the defective positions in the filling area subsequently. Among them, in the prior art, the evaluation module can establish a three-dimensional model of the filling area and perform stress analysis using the finite element method to predict the stress distribution at each location in the filling area. For stress concentration areas, there is usually a high stress gradient, that is, the stress changes rapidly in a short time. Therefore, the distribution points of each stress concentration area can be comprehensively summarized to obtain the best repair cutting-in orientation.

[0017] As a preferred embodiment, the rotation and adjustment assembly 2 includes: Two frame plates 21 arranged parallel to each other left and right. Both of the two frame plates 21 are fixed on one side of the adjustment part 12, and a shaft tube 23 is rotatably connected in the frame plate 21; A support arm 22 is rotatably connected to one side of the frame plate 21. The support arm 22 is fixed to one end of the shaft tube, and a main pulley and a secondary pulley are rotatably connected inside the support arm 22. The main pulley and the shaft tube 23 are concentrically arranged; An inner drive rod is rotatably connected inside the shaft tube 23. One end of the inner drive rod is fixed to the main pulley. A drive part 24 is provided on one side of the adjustment part 12, and the output end of the drive part 24 is fixed to the inner drive rod; A transmission belt is connected between the main pulley and the secondary pulley. One end of the pneumatic pressure rod assembly 3 is fixed to the secondary pulley. That is, the drive part can continuously drive the main pulley to rotate through the inner drive rod, and then drive the secondary pulley to rotate through the transmission belt. At this time, the secondary pulley can synchronously drive the pneumatic pressure rod assembly to rotate. When the adjustment part slides along the transmission rack, the end of the pneumatic pressure rod assembly can form a spinning pressure on the surface of the filling area.

[0018] In this embodiment, a gear 25 is sleeved on the shaft tube 23 between two mounting plates 21. A rack plate 26 is slidably connected to the mounting plate 21. The rack plate 26 is meshed with the gear 25 for transmission. An electric telescopic rod 27 is arranged on the mounting plate 21, and the telescopic end of the electric telescopic rod 27 is fixed to the rack plate 26; The rotation angle range of the support arm 22 driven by the gear 25 for transmission is between -50° and 220°; that is, the electric telescopic rod can drive the support arm to deflect during telescopic adjustment. Thus, when the end of the pneumatic pressure rod assembly penetrates into the paste filling area, it can form an arc displacement trajectory in the filling area to realize the rapid formation of the lengthened and expanded tightening hole.

[0019] In this embodiment, the support arm 22 is arranged in a two-section structure, and the upper section arm of the support arm 22 is slidably connected to the lower section arm of the support arm 22 through a limiting rod 28. The auxiliary pulley is rotatably connected to the upper section arm; A tension pulley 29 is installed on the lower section arm of the support arm 22. The tension pulley 29 is in rolling contact with the surface of the transmission belt, which can effectively change the rotation radius of the pneumatic pressure rod assembly, thereby adjusting the radius of the formed lengthened and expanded tightening hole according to the operation requirements. In particular, for the stress concentration position inside the paste filling area, the shape of the lengthened and expanded tightening hole can be flexibly adjusted to effectively relieve stress concentration.

[0020] In this embodiment, the pneumatic pressure rod assembly 3 includes: A stamping rod 31, which is rotatably connected to the support arm 22 in the turning component 2. An inner cavity is provided in the stamping rod 31; A vibration guiding mechanism 4, which is arranged in the inner cavity. A vibration guiding rod 32 is slidably arranged in the inner cavity, and one end of the vibration guiding mechanism 4 is connected to the vibration guiding rod 32; An inner shaft head 33, which is slidably connected to one end of the stamping rod 31. The inner shaft head 33 is fixed to the other end of the vibration guiding rod 32; An external sleeve 34, which is detachably installed on the inner shaft head 33; the external sleeve can provide different drill sleeve structures according to different working environments; The air flow seat 35 is fixed on the support arm 22 in the rotation assembly 2. A central air cavity is arranged in the air flow seat 35. One side of the air flow seat 35 is rotatably connected with a sealing sleeve 36. One end of the sealing sleeve 36 is fixed to the punching rod 31 and is communicated with the inner cavity in the punching rod 31. That is, the vibration guiding mechanism can provide working vibration to the inner shaft head through the punching rod. On the one hand, it can facilitate the inner shaft head to quickly spin and penetrate into the paste filling area. On the other hand, the generated working vibration can vibrate the filling area, enhancing the compactness of the paste distribution in the filling area. It should be noted that the time window for this repair operation should be prior to the complete curing and forming of the paste in the filling area. At the same time, it is necessary to combine the ambient temperature and humidity of the current working condition to ensure that the repair operation is completed before the paste is completely cured.

[0021] As a preferred embodiment, the vibration guiding mechanism 4 includes: An inner cylinder tube 41, inside which a pneumatic plug 42 is slidably connected. There are two reinforcing rods 43 fixed to one side of the pneumatic plug 42. One end of the reinforcing rod 43 is connected to the vibration guiding rod 32; A positioning sleeve 44 is coaxially fixed on the side of the inner cylinder tube 41 away from the vibration guiding rod 32. A first pulse chamber 51 is sealed between the positioning sleeve 44 and the pneumatic plug 42; An isolation seat 5 is hermetically fixed in the inner cavity of the punching rod 31. A communication cavity 53 is arranged in the isolation seat 5, and branch air channels are arranged outside the communication cavity 53; A second pulse chamber 52 is sealed between the inner cylinder tube 41 and the pneumatic plug 52. An air flow channel is arranged in the pneumatic plug 42. The communication cavity 53 is connected to the second pulse chamber 52 through the air flow channel; A sealing air ring 6 is rotatably sleeved outside the punching rod 31. One end of the sealing air ring 6 is fixed to the support arm 22 in the rotation assembly 2. An outer air channel 45 is radially arranged on the positioning sleeve 44. One end of the outer air channel 45 penetrates and is fixed on the side wall of the punching rod 31 and is communicated with the sealing air ring 6. The sealing air ring can inject air into the first pulse chamber through the outer air channel. At this time, the pneumatic plug can slide radially along the inner cylinder tube and gradually approach the right end of the inner cylinder tube (the second pulse chamber is in flexible exhaust), and the air flow seat can inject air into the communication cavity through the branch air channels on the isolation seat. The high-pressure gas enters the second pulse chamber through the air flow channel in the pneumatic plug to inject air. At this time, the pneumatic plug can slide radially along the inner cylinder tube and gradually approach the left end of the inner cylinder tube (the first pulse chamber is in flexible exhaust), so as to drive the vibration guiding rod to perform axial reciprocating displacement through the reinforcing rod. At this time, the inner shaft head at the end can form axial vibration under high-frequency switching, so as to provide axial vibration effect to the paste filling area.

[0022] In this embodiment, pulse tubes are connected to both the air flow seat 35 and the sealing air ring 6, and the two pulse tubes are continuously and intermittently coordinated.

[0023] In this embodiment, a centrifugal vibrator is provided in the inner shaft head 33, and the centrifugal vibrator can provide radial vibration.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A paste filling, repairing and strengthening device for the treatment of gob areas in coal mines, characterized in that: It includes: An installation support (1), detachably installed on the frame, and a transmission frame (11) is horizontally fixed on the installation support (1); An adjustment part (12), slidably installed on the transmission frame (11); A pneumatic pressure rod assembly (3), horizontally arranged on one side of the adjustment part (12), and the pneumatic pressure rod assembly (3) is used to provide stable and continuous pressure output to the filling area where paste filling in the mine stoping area is initially completed, and form a tightening hole with a strengthening effect inside the filling area for subsequent supplementary feeding of new filling paste; A turning component (2), installed on the adjustment part (12), one end of the pneumatic pressure rod assembly (3) is connected to the turning component (2), and the turning component (2) can provide displacement guidance to the pneumatic pressure rod assembly (3) after the pneumatic pressure rod assembly (3) partially penetrates into the filling area; The pneumatic pressure rod assembly (3) drives to form an upwardly curved arc-shaped displacement trajectory through the support arm (22) in the turning component (2), so as to correspondingly form an elongated tightening hole with an arc-shaped cross-section in the filling area.

2. The paste filling repair and reinforcement equipment for the treatment of gob filling in coal mines according to claim 1, characterized in that: A plurality of stress sensors are evenly distributed in the filling area, and a vibration simulator is placed at the working face of the stoping area, and the vibration simulator is used to simulate the vibration effect generated during the mining work in the stoping area; A data transmission module is arranged on the installation support (1), the data transmission module collects the stress distribution data of the filling area detected by the stress sensors in real time, and an evaluation module is arranged outside the data transmission module. The evaluation module evaluates the structural stability of the filling area based on the obtained stress distribution data of the filling area and identifies the stress concentration area, so as to guide the pneumatic pressure rod assembly (3) to reinforce and repair the defective position of the filling area subsequently.

3. The paste filling, repairing and strengthening equipment for the treatment of gob areas in coal mines according to claim 1, characterized in that: The turning component (2) includes: Two frame plates (21) arranged parallel to each other from left to right, both of the two frame plates (21) are fixed on one side of the adjustment part (12), and a shaft tube (23) is rotatably connected in the frame plate (21); A support arm (22), rotatably connected to one side of the frame plate (21), the support arm (22) is fixed to one end of the shaft tube (23), and a main pulley and a secondary pulley are rotatably connected inside the support arm (22), and the main pulley and the shaft tube (23) are concentrically arranged; An inner driving rod, rotatably connected inside the shaft tube (23), one end of the inner driving rod is fixed to the main pulley, a driving part (24) is arranged on one side of the adjustment part (12), and the output end of the driving part (24) is fixed to the inner driving rod; A transmission belt, connected between the main pulley and the secondary pulley, and one end of the pneumatic pressure rod assembly (3) is fixed to the secondary pulley.

4. The paste filling repair and reinforcement equipment for filling and treating goaf in coal mines according to claim 3, characterized in that: A gear (25) is sleeved on the shaft tube (23) between the two frame plates (21), a rack plate (26) is slidably connected to the frame plate (21), the rack plate (26) is meshed with the gear (25) for transmission, and an electric telescopic rod (27) is arranged on the frame plate (21), and the telescopic end of the electric telescopic rod (27) is fixed to the rack plate (26); The rotation angle range of the bracket arm (22) driven by gear engagement is between -50° and 220°.

5. The paste filling repair and reinforcement equipment for the treatment of goaf in coal mines according to claim 4, characterized in that: The bracket arm (22) is provided with a two-section structure, and the upper section arm of the bracket arm (22) is slidably connected to the lower section arm of the bracket arm through a limiting rod (28), and the secondary pulley is rotatably connected to the upper section arm; The lower section arm of the bracket arm (22) is provided with a tension pulley (29), and the tension pulley (29) is in rolling contact with the surface of the transmission belt.

6. The paste filling repair and reinforcement equipment for filling and treating the gob area of a coal mine according to claim 1, characterized in that: The pneumatic pressure rod assembly (3) includes: A stamping rod (31) rotatably connected to the bracket arm (22) in the turning assembly (2), and an inner cavity is provided in the stamping rod (31); A vibration guiding mechanism (4) is arranged in the inner cavity, a vibration guiding rod (32) is slidably arranged in the inner cavity, and one end of the vibration guiding mechanism (4) is connected to the vibration guiding rod (32); An inner shaft head (33) is slidably connected to one end of the stamping rod (31), and the inner shaft head (33) is fixed to the other end of the vibration guiding rod (32); An external sleeve (34) is detachably installed on the inner shaft head (33); An air flow seat (35) is fixed to the bracket arm (22) in the turning assembly (2), a central air cavity is arranged in the air flow seat (35), a sealing sleeve (36) is rotatably connected to one side of the air flow seat (35), and one end of the sealing sleeve (36) is fixed to the stamping rod (31) and is communicated with the inner cavity in the stamping rod (31).

7. The paste filling repair and reinforcement equipment for coal mine goaf filling treatment according to claim 6, characterized in that: The vibration guiding mechanism (4) includes: An inner cylinder tube (41) with a pneumatic plug column (42) slidably connected inside it. Two reinforcing rods (43) are fixed on one side of the pneumatic plug column (42), and one end of the reinforcing rods (43) is connected to the vibration guiding rod (32); A positioning sleeve (44) is coaxially fixed on the side of the inner cylinder tube (41) far from the vibration guiding rod (32). A first pulse chamber (51) is sealed between the positioning sleeve (44) and the pneumatic plug column (42); An isolation seat (5) is hermetically fixed in the inner cavity of the stamping rod (31). A communication cavity (53) is arranged in the isolation seat (5), and a branch air duct is arranged outside the communication cavity (53); A second pulse chamber (52) is sealed between the inner cylinder tube (41) and the pneumatic plug column (52), and an air flow channel is arranged in the pneumatic plug column (42). The communication cavity (53) is communicated with the second pulse chamber (52) through the air flow channel; A sealing air ring (6) is rotatably sleeved outside the stamping rod (31). One end of the sealing air ring (6) is fixed to the bracket arm (22) in the turning assembly (2). An external air duct (45) is radially arranged on the positioning sleeve (44), and one end of the external air duct (45) penetrates and is fixed on the side wall of the stamping rod (31) and is communicated with the sealing air ring (6).

8. The paste filling repair and reinforcement equipment for the treatment of gob filling in coal mines according to claim 7, characterized in that: Pulse tubes are connected to both the air flow seat (35) and the sealing air ring (6), and the two pulse tubes are continuously and intermittently coordinated.

9. The paste filling repair and reinforcement equipment for the treatment of goaf in coal mines according to claim 6, characterized in that: A centrifugal vibrator is arranged in the inner shaft head (33).

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