Anti-overflow hole sealing structure for blast gas of coal seam of rock burst mine

Abstract

The invention belongs to the technical field of blasting pressure relief hole sealing, and particularly discloses a rock burst mine coal seam blasting gas overflow prevention hole sealing structure which comprises a first plugging block and a second plugging block, a grouting pipe and a slurry return pipe are arranged on the side, away from the second plugging block, of the first plugging block, and a connecting mechanism is arranged on the surface of the first plugging block. A connecting pipe is fixedly connected between the first plugging block and the second plugging block; an injection cavity can be formed in a drill hole through the first plugging block and the second plugging block and used for guiding in of slurry, and after the slurry is guided into the injection cavity and returned through the slurry returning pipe, the grouting pipe and the slurry returning pipe are separated from the grouting assembly and the connecting pipe through the butt joint assembly; and a threaded rod can be rotated to drive an extrusion plate to slide along the interior of an adjusting groove to be close to a second plugging block, so that slurry located in an injection cavity is extruded, the pressure of the slurry is increased, the slurry better permeates into a crack of a drill hole, and the hole sealing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of blasting pressure relief and hole sealing, and specifically discloses a hole sealing structure for preventing external overflow of blasting gas in coal seams of rock burst mines. Background Art

[0002] The coal seams in the mine have strong rock burst proneness. During the mining process of the solid coal roadway in the mining and excavation working face, in order to ensure the safe and efficient production of the mine, the pressure relief project needs to meet the relevant anti-rock burst requirements. Therefore, pressure relief boreholes need to be constructed on both sides of the roadway. Due to the severe contradiction between pressure relief and production, especially the introduction of roadheader-anchoring machines for rapid driving of coal roadways, the pressure relief progress does not match the mining and excavation progress. According to the original large-diameter borehole pressure relief technology, the required pressure relief project cannot be achieved, which to a certain extent causes the lag of the pressure relief project and is not conducive to the safe production of the mine due to the rock burst disaster in the mine. Therefore, the large-diameter pressure relief borehole is changed to three-dimensional directional blasting pressure relief. After changing the pressure relief technology, the pressure relief effect is remarkable, effectively reducing the risk of rock burst and improving the mining and excavation efficiency. However, due to the large-scale use of blasting pressure relief, the original yellow mud hole sealing can only seal the borehole intelligently and cannot effectively block the cracks in the coal seam. After blasting, CO overflows along the cracks, causing the CO sensor in the mine to exceed the limit and alarm. Summary of the Invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide a hole sealing structure for preventing external overflow of blasting gas in coal seams of rock burst mines to solve the problem of easy CO leakage after blasting in the prior art.

[0004] To achieve the above object, the present invention provides a hole sealing structure for preventing external overflow of blasting gas in coal seams of rock burst mines, including a first sealing block and a second sealing block. A grouting pipe and a slurry return pipe are arranged on one side of the first sealing block away from the second sealing block. A connecting mechanism is arranged on the surface of the first sealing block. A connecting pipe is fixedly connected between the first sealing block and the second sealing block. Two symmetrically distributed grouting holes are formed on the surface of one end of the connecting pipe close to the second sealing block. One end of the connecting pipe penetrates out of the first sealing block. A cable guiding structure is arranged between the first sealing block and the second sealing block. An auxiliary component is arranged inside the second sealing block;

[0005] The connecting mechanism includes a docking component arranged on one side of the first sealing block away from the second sealing block, and a grouting component is arranged on one side of the first sealing block close to the second sealing block;

[0006] Wherein, the grouting component includes an adjusting groove formed on one side of the first sealing block close to the second sealing block. An extrusion plate is slidably connected to the inner wall of the adjusting groove. One side of the extrusion plate away from the second sealing block is rotatably connected to a threaded rod. The other end of the threaded rod penetrates out of the first sealing block, and a retaining ring is fixedly connected to the surface of the threaded rod.

[0007] In the above technical solution, preferably, a recovery cylinder is embedded and installed on one side of the first plugging block close to the second plugging block. One end of the recovery cylinder far from the second plugging block is communicated with a fixed pipe, and the other end of the fixed pipe penetrates out of the first plugging block. An installation rod is fixedly connected to the inner wall of the recovery cylinder, and a plugging plate is fixedly connected to the other end of the installation rod. A sliding ring is slidably connected to the surface of the plugging plate, the outer side of the sliding ring is slidably connected to the inner wall of the recovery cylinder, and a second spring is fixedly connected between the side of the sliding ring far from the second plugging block and the inner wall of the recovery cylinder.

[0008] In the above technical solution, preferably, the docking assembly includes two limiting rings respectively fixedly connected to the inner walls of the fixed pipe and the connecting pipe. A sliding pipe is slidably connected to the inner side of the limiting ring, and the other end of the sliding pipe is fixedly connected to a docking pipe. The internal channel of the sliding pipe is in a horn shape. A ring-shaped distributed clamping block is fixedly connected to the surface of the docking pipe, and a third spring is fixedly connected to the side of the docking pipe close to the first plugging block.

[0009] In the above technical solution, preferably, a blocking block is slidably connected to the inner walls of both sliding pipes. A positioning rod is fixedly connected to the side of the blocking block close to the first plugging block. The other ends of the two positioning rods respectively penetrate out of the two sliding pipes and are respectively fixedly connected to the inner walls of the fixed pipe and the connecting pipe. The diameter of the positioning rod is smaller than the diameter of the blocking block.

[0010] In the above technical solution, preferably, the docking assembly further includes two docking heads respectively communicated with the grouting pipe and the slurry return pipe. A card slot corresponding to the clamping block is opened on the surface of the docking head.

[0011] In the above technical solution, preferably, two connecting strips are fixedly connected to the surface of one of the sliding pipes and are symmetrically distributed. The other ends of the connecting strips are fixedly connected to an anti-return plate for blocking the grouting hole.

[0012] In the above technical solution, preferably, the cable guiding structure includes a cable guiding pipe arranged between the first plugging block and the second plugging block. One end of the cable guiding pipe penetrates out of the first plugging block. An installation channel is opened on the surface of the second plugging block, and the other end of the cable guiding pipe is communicated with the installation channel. A shielding plate for shielding the installation channel is arranged on the side of the second plugging block far from the first plugging block. A rotating shaft is fixedly connected to the surface of the shielding plate, and the other end of the rotating shaft is rotatably connected to the inner wall of the second plugging block. A hairspring is fixedly connected between the rotating shaft and the inner wall of the second plugging block.

[0013] In the above technical solution, preferably, the auxiliary component includes an installation cavity opened inside the second plugging block. A through hole communicating with the installation cavity is opened on one side of the second plugging block away from the first plugging block. A connecting rod is fixedly connected to the inner wall of the installation cavity. A sealing ring is slidably connected to the surface of one end of the connecting rod close to the through hole. The outer side of the sealing ring is in contact with the inner wall of the installation cavity. A first spring is fixedly connected between the sealing ring and the inner wall of the installation cavity. A through groove is opened in the middle of the surface of the connecting rod.

[0014] In the above technical solution, preferably, a groove is opened on the surface of the second plugging block. A storage bag is fixedly connected inside the groove. A conduit is communicated with the inner side of the storage bag. The other end of the conduit is communicated with the installation cavity.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The first plugging block and the second plugging block can form an injection cavity inside the drill hole for the introduction of the slurry. After the slurry is introduced into the injection cavity and returns through the slurry return pipe, the grouting pipe and the slurry return pipe are separated from the grouting component and the connecting pipe through the docking component. The threaded rod can be rotated to drive the extrusion plate to slide along the inside of the adjustment groove close to the second plugging block, so as to extrude the slurry located inside the injection cavity, thereby increasing the pressure of the slurry and making it better penetrate into the cracks of the drill hole, improving the hole plugging effect.

[0017] 2. By setting the connection structure, it can cooperate with the docking component to ensure that the grouting can be smoothly introduced into the injection cavity during the installation of the grouting pipe and the slurry return pipe. After the grouting is completed, when the slurry return pipe and the grouting pipe are disassembled, at this time, the sliding pipe can be driven to reset under the action of the third spring, and the sliding pipe can be blocked by the stop block, so that the slurry cannot be discharged through the connecting pipe or the fixed pipe, so as to wait for the slurry to solidify inside the drill hole.

[0018] 3. By setting the cable guiding structure, the fuse can be protected to avoid the situation that the slurry affects the fuse during the grouting process and is not conducive to subsequent detonation.

[0019] 4. By setting the auxiliary component, as the CO gas generated after the detonator explosive detonates causes the internal air pressure to rise, the gas enters the inside of the installation cavity through the through hole and pushes the sealing ring to slide along the surface of the connecting rod. When the sealing ring moves to the middle of the through groove, the gas can be injected into the storage bag through the conduit, causing the storage bag to bulge and further filling the groove, increasing the sealing degree between the second plugging block and the inner wall of the drill hole, improving the sealing effect, making full use of the generated gas, and reducing the situation of gas overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention;

[0021] Figure 2 Schematic cross-sectional view of the second plugging block of the present invention;

[0022] Figure 3 is Figure 2 an enlarged view of A in

[0023] Figure 4 Schematic connection diagram of the connection mechanism and the first plugging block of the present invention;

[0024] Figure 5 Schematic connection diagram of the anti-return plate, connection bar and sliding tube of the present invention;

[0025] Figure 6 Schematic connection diagram of the sliding tube, stop block and positioning rod of the present invention;

[0026] Figure 7 Schematic structural diagram of the docking head of the present invention.

[0027] In the figure: 1, the first plugging block; 101, the grouting pipe; 102, the slurry return pipe; 2, the second plugging block; 201, the storage bladder; 202, the through hole; 203, the connecting rod; 204, the through groove; 205, the sealing ring; 206, the conduit; 207, the first spring; 3, the connecting pipe; 301, the grouting hole; 4, the connecting mechanism; 401, the extrusion plate; 402, the retaining ring; 403, the threaded rod; 404, the recovery cylinder; 405, the mounting rod; 406, the plugging plate; 407, the sliding ring; 408, the second spring; 409, the fixed pipe; 41, the docking assembly; 4101, the positioning rod; 4102, the limiting ring; 4103, the stop block; 4104, the third spring; 4105, the locking block; 4106, the docking pipe; 4107, the docking head; 4108, the connecting bar; 4109, the anti-return plate; 4110, the sliding tube; 5, the guide cable tube; 501, the installation channel; 502, the clockwork spring; 503, the rotating shaft; 504, the shielding plate. Detailed implementation manners

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0030] Such as Figures 1 - 7A gas anti-overflow hole-sealing structure for coal seam blasting in a rock burst mine is shown, which includes a first sealing block 1 and a second sealing block 2. A grouting pipe 101 and a slurry return pipe 102 are arranged on one side of the first sealing block 1 away from the second sealing block 2. A connecting mechanism 4 is arranged on the surface of the first sealing block 1. A connecting pipe 3 is fixedly connected between the first sealing block 1 and the second sealing block 2. Two symmetrically distributed grouting holes 301 are formed on the surface of one end of the connecting pipe 3 close to the second sealing block 2. One end of the connecting pipe 3 penetrates out of the first sealing block 1. A cable guiding structure is arranged between the first sealing block 1 and the second sealing block 2. An auxiliary component is arranged inside the second sealing block 2;

[0031] The connecting mechanism 4 includes a docking component 41 arranged on one side of the first sealing block 1 away from the second sealing block 2, and a grouting component is arranged on one side of the first sealing block 1 close to the second sealing block 2;

[0032] Among them, the grouting component includes an adjustment groove formed on one side of the first sealing block 1 close to the second sealing block 2. An extrusion plate 401 is slidably connected to the inner wall of the adjustment groove. A threaded rod 403 is rotatably connected to the side of the extrusion plate 401 away from the second sealing block 2. The other end of the threaded rod 403 penetrates out of the first sealing block 1, and a retaining ring 402 is fixedly connected to the surface of the threaded rod 403.

[0033] During specific use, when drilling construction is carried out in the coal seam, after drilling the required blasting installation hole, the cartridge explosive is loaded, and the fuse of the cartridge explosive is passed through the cable guiding component for subsequent detonation. And the second sealing block 2 is installed close to the cartridge explosive into the inside of the drill hole, so that the surfaces of the second sealing block 2 and the first sealing block 1 are closely attached to the inner wall of the drill hole. During this process, an injection cavity is formed between the first sealing block 1 and the second sealing block 2 for subsequent injection of slurry to facilitate hole sealing. After the slurry is introduced into the injection cavity and returns through the slurry return pipe 102, rotate to separate the grouting pipe 101 and the slurry return pipe 102 from the grouting component and the connecting pipe 3 through the docking component 41. At this time, the threaded rod 403 can be rotated to drive the extrusion plate 401 to slide along the inside of the adjustment groove close to the second sealing block 2, so as to extrude the slurry located in the injection cavity, thereby increasing the pressure of the slurry to make it better penetrate into the cracks of the drill hole and improving the hole sealing effect.

[0034] Such as Figures 1 - 7As shown, on the side of the first plugging block 1 close to the second plugging block 2, a recovery cylinder 404 is embedded and installed. One end of the recovery cylinder 404 far from the second plugging block 2 is communicated with a fixed pipe 409. The other end of the fixed pipe 409 penetrates through the first plugging block 1. An installation rod 405 is fixedly connected to the inner wall of the recovery cylinder 404. The other end of the installation rod 405 is fixedly connected to a plugging plate 406. A sliding ring 407 is slidably connected to the surface of the plugging plate 406. The outer side of the sliding ring 407 is slidably connected to the inner wall of the recovery cylinder 404. A second spring 408 is fixedly connected between the side of the sliding ring 407 far from the second plugging block 2 and the inner wall of the recovery cylinder 404.

[0035] During the grouting process, as the slurry increases, it can push the sliding ring 407 under pressure to overcome the elastic force of the second spring 408 and move, so that the slurry can pass through the gap between the inner side of the sliding ring 407 and the installation rod 405, pass through the recovery cylinder 404 and enter the inside of the fixed pipe 409. During this process, it can be discharged through the docking assembly 41 and the return slurry pipe 102 to prompt the staff that the grouting inside the drill hole is completed.

[0036] As Figures 1 - 7 shown, the docking assembly 41 includes two limit rings 4102 respectively fixedly connected to the inner walls of the fixed pipe 409 and the connecting pipe 3. A sliding pipe 4110 is slidably connected to the inner side of the limit ring 4102. The other end of the sliding pipe 4110 is fixedly connected to a docking pipe 4106. The internal channel of the sliding pipe 4110 is in a flared shape. A ring-shaped distributed clamping block 4105 is fixedly connected to the surface of the docking pipe 4106. A third spring 4104 is fixedly connected to the side of the docking pipe 4106 close to the first plugging block 1.

[0037] Blocking blocks 4103 are slidably connected to the inner walls of the two sliding pipes 4110. A positioning rod 4101 is fixedly connected to the side of the blocking block 4103 close to the first plugging block 1. The other ends of the two positioning rods 4101 respectively penetrate through the two sliding pipes 4110 and are fixedly connected to the inner walls of the fixed pipe 409 and the connecting pipe 3. The diameter of the positioning rod 4101 is smaller than the diameter of the blocking block 4103.

[0038] The docking assembly 41 further includes two docking heads 4107 respectively communicated with the grouting pipe 101 and the return slurry pipe 102. A card slot corresponding to the clamping block 4105 is opened on the surface of the docking head 4107.

[0039] Two connecting strips 4108 with a quantity of two and symmetrically distributed are fixedly connected to the surface of one of the sliding pipes 4110. The other ends of the connecting strips 4108 are fixedly connected to an anti-return plate 4109 for blocking the grouting hole 301.

[0040] Specifically, the other ends of the two third springs 4104 are respectively fixedly connected to the surfaces of the connecting pipe 3 and the fixed pipe 409;

[0041] Under normal conditions, the position of the sliding tube 4110 can be maintained under the action of the third spring 4104. For details, see Figures 5 - 6 , in which the setting of the limiting ring 4102 can prevent the sliding tube 4110 from falling off. At this time, the stopper 4103 can block the internal channel of the sliding tube 4110. During the grouting process, the grouting pipe 101 and the slurry return pipe 102 are connected to the two docking pipes 4106 through the connector 4107 and pushed towards the first plugging block 1. At this time, the third spring 4104 can be compressed and the sliding tube 4110 can be driven to slide along the inner side of the limiting ring 4102. During this process, the stopper 4103 can move along the internal channel of the sliding tube 4110. However, since the internal channel of the sliding tube 4110 is formed in a flared shape, the internal channel of the sliding tube 4110 is no longer blocked as the movement progresses, and the slurry can pass through the gap between the inner wall of the sliding tube 4110 and the stopper 4103, thereby enabling the normal transportation of the slurry. At the same time, during the movement of the sliding tube 4110, the connecting strip 4108 can be driven to displace the anti-return plate 4109. At this time, the slurry can be discharged into the injection cavity through the grouting hole 301 for plugging the drilling hole. When the grouting is completed, the slurry return pipe 102 and the grouting pipe 101 are disassembled. At this time, the sliding tube 4110 can be driven to reset under the action of the third spring 4104, and the sliding tube 4110 can be blocked in cooperation with the stopper 4103, so that the slurry cannot be discharged through the connecting pipe 3 or the fixed pipe 409, so as to wait for the slurry to solidify inside the drilling hole.

[0042] As Figures 1 - 7 shown, the cable guiding structure includes a cable guiding tube 5 arranged between the first plugging block 1 and the second plugging block 2. One end of the cable guiding tube 5 penetrates out of the first plugging block 1. An installation channel 501 is formed on the surface of the second plugging block 2. The other end of the cable guiding tube 5 is communicated with the installation channel 501. A shielding plate 504 for shielding the installation channel 501 is arranged on the side of the second plugging block 2 away from the first plugging block 1. A rotating shaft 503 is fixedly connected to the surface of the shielding plate 504. The other end of the rotating shaft 503 is rotatably connected to the inner wall of the second plugging block 2. A hairspring 502 is fixedly connected between the rotating shaft 503 and the inner wall of the second plugging block 2.

[0043] The detonating fuse can expose the installation channel 501 by flipping the shielding plate 504 and then pass through the installation channel 501 and the cable guiding tube 5 for subsequent detonation. After the detonation, the fuse is burned out. At this time, the shielding plate 504 can be driven to reset under the action of the hairspring 502 to shield the installation channel 501 to prevent the gas generated by the explosion from flowing out through this place.

[0044] As Figures 1 - 7As shown in the figure, the auxiliary component includes an installation cavity formed inside the second plugging block 2. A through hole 202 communicating with the installation cavity is formed on one side of the second plugging block 2 away from the first plugging block 1. A connecting rod 203 is fixedly connected to the inner wall of the installation cavity. A sealing ring 205 is slidably connected to the surface of one end of the connecting rod 203 close to the through hole 202. The outer side of the sealing ring 205 is in contact with the inner wall of the installation cavity. A first spring 207 is fixedly connected between the sealing ring 205 and the inner wall of the installation cavity. A through groove 204 is formed in the middle of the surface of the connecting rod 203.

[0045] A groove is formed on the surface of the second plugging block 2. A storage bladder 201 is fixedly connected inside the groove. A conduit 206 is communicated with the inner side of the storage bladder 201. The other end of the conduit 206 is communicated with the installation cavity.

[0046] As the CO gas generated after the detonator explosive is detonated causes the internal air pressure to rise, the gas enters the inside of the installation cavity through the through hole 202 and pushes the sealing ring 205 to slide along the surface of the connecting rod 203. When the sealing ring 205 moves to the middle of the through groove 204, the gas can be injected into the inside of the storage bladder 201 through the conduit 206, causing the storage bladder 201 to bulge and further fill the groove, increasing the sealing degree between the second plugging block 2 and the inner wall of the drill hole and improving the sealing effect.

[0047] Construction process:

[0048] S1. Use a drilling device (such as a drilling rig) to drill a hole at the required position.

[0049] S2. After drilling the required blasting installation hole, load the detonator explosive, and pass the fuse of the detonator explosive through the cable guide assembly for subsequent detonation.

[0050] S3. Install the second plugging block 2 close to the detonator explosive into the drill hole, and connect the grouting pipe 101 and the slurry return pipe 102. The slurry return pipe 102 should be set in an L shape, and the highest point should be more than 1.5 meters above the hole opening. After the connection is completed, inject the slurry through the grouting pump and the grouting pipe 101.

[0051] S4. Stop grouting after the slurry return pipe 102 returns the slurry, and disassemble the slurry return pipe 102 and the grouting pipe 101 and wait for solidification before detonating.

[0052] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas anti-overflow hole-sealing structure for coal seam blasting in a rock burst mine, comprising a first plugging block (1) and a second plugging block (2), characterized in that, On one side of the first plugging block (1) away from the second plugging block (2), a grouting pipe (101) and a slurry return pipe (102) are provided. A connecting mechanism (4) is arranged on the surface of the first plugging block (1). A connecting pipe (3) is fixedly connected between the first plugging block (1) and the second plugging block (2). Two grouting holes (301) which are symmetrically distributed are formed in the surface of one end of the connecting pipe (3) close to the second plugging block (2). One end of the connecting pipe (3) penetrates through the first plugging block (1). A cable guiding structure is arranged between the first plugging block (1) and the second plugging block (2). An auxiliary component is arranged inside the second plugging block (2). The connecting mechanism (4) includes a docking component (41) arranged on one side of the first plugging block (1) away from the second plugging block (2), and a grouting component is arranged on one side of the first plugging block (1) close to the second plugging block (2). Among them, the grouting component includes an adjustment groove opened on one side of the first plugging block (1) close to the second plugging block (2). A pressing plate (401) is slidably connected to the inner wall of the adjustment groove. A threaded rod (403) is rotatably connected to the side of the pressing plate (401) away from the second plugging block (2). The other end of the threaded rod (403) penetrates through the first plugging block (1), and a retaining ring (402) is fixedly connected to the surface of the threaded rod (403).

2. The outburst-prone mine coal seam blasting gas anti-overflow hole sealing structure according to claim 1, characterized in that, A recovery cylinder (404) is embedded and installed on one side of the first plugging block (1) close to the second plugging block (2). One end of the recovery cylinder (404) away from the second plugging block (2) is communicated with a fixed pipe (409). The other end of the fixed pipe (409) penetrates through the first plugging block (1). A mounting rod (405) is fixedly connected to the inner wall of the recovery cylinder (404). The other end of the mounting rod (405) is fixedly connected to a plugging plate (406). A sliding ring (407) is slidably connected to the surface of the plugging plate (406). The outer side of the sliding ring (407) is slidably connected to the inner wall of the recovery cylinder (404). A second spring (408) is fixedly connected between the side of the sliding ring (407) away from the second plugging block (2) and the inner wall of the recovery cylinder (404).

3. The gas anti-overflow hole sealing structure for coal seam blasting in a rock burst mine according to claim 2, characterized in that, The docking component (41) includes two limit rings (4102) respectively fixedly connected to the inner walls of the fixed pipe (409) and the connecting pipe (3). A sliding pipe (4110) is slidably connected to the inner side of the limit ring (4102). The other end of the sliding pipe (4110) is fixedly connected to a docking pipe (4106). The internal channel of the sliding pipe (4110) is in a horn shape. Annularly distributed clamping blocks (4105) are fixedly connected to the surface of the docking pipe (4106). A third spring (4104) is fixedly connected to the side of the docking pipe (4106) close to the first plugging block (1).

4. The outburst-prone mine coal seam blasting gas anti-overflow hole-sealing structure according to claim 3, characterized in that, A stopper (4103) is slidably connected to the inner walls of both of the sliding tubes (4110). A positioning rod (4101) is fixedly connected to the side of the stopper (4103) close to the first plugging block (1). The other ends of the two positioning rods (4101) respectively penetrate through the two sliding tubes (4110) and are fixedly connected to the inner walls of the fixed tube (409) and the connecting tube (3). The diameter of the positioning rod (4101) is smaller than the diameter of the stopper (4103).

5. The gas anti-overflow hole sealing structure for coal seam blasting in a rock burst mine according to claim 4, characterized in that, The docking assembly (41) further includes two docking heads (4107) respectively communicating with the grouting pipe (101) and the slurry return pipe (102). A card slot corresponding to the card block (4105) is formed on the surface of the docking head (4107).

6. The gas anti-overflow hole sealing structure for coal seam blasting in a rock burst mine according to claim 5, characterized in that Two connecting bars (4108) which are symmetrically distributed are fixedly connected to the surface of one of the sliding tubes (4110). The other ends of the connecting bars (4108) are fixedly connected to an anti-backflow plate (4109) for blocking the grouting holes (301).

7. The gas anti-overflow hole sealing structure for coal seam blasting in a rock burst mine according to claim 1, characterized in that, The cable guiding structure includes a cable guiding tube (5) arranged between the first plugging block (1) and the second plugging block (2). One end of the cable guiding tube (5) penetrates through the first plugging block (1). An installation channel (501) is formed on the surface of the second plugging block (2). The other end of the cable guiding tube (5) communicates with the installation channel (501). A shielding plate (504) for blocking the installation channel (501) is arranged on the side of the second plugging block (2) away from the first plugging block (1). A rotating shaft (503) is fixedly connected to the surface of the shielding plate (504). The other end of the rotating shaft (503) is rotatably connected to the inner wall of the second plugging block (2). A clockwork spring (502) is fixedly connected between the rotating shaft (503) and the inner wall of the second plugging block (2).

8. The gas anti-overflow hole sealing structure for coal seam blasting in a rock burst mine according to claim 1, characterized in that, The auxiliary assembly includes an installation cavity formed inside the second plugging block (2). A through hole (202) communicating with the installation cavity is formed on the side of the second plugging block (2) away from the first plugging block (1). A connecting rod (203) is fixedly connected to the inner wall of the installation cavity. A sealing ring (205) is slidably connected to the surface of one end of the connecting rod (203) close to the through hole (202). The outer side of the sealing ring (205) is in contact with the inner wall of the installation cavity. A first spring (207) is fixedly connected between the sealing ring (205) and the inner wall of the installation cavity. A through groove (204) is formed in the middle of the surface of the connecting rod (203).

9. The gas-proof overflow sealing hole structure for coal seam blasting in a rock burst mine according to claim 8, characterized in that, A groove is formed on the surface of the second plugging block (2). A storage bladder (201) is fixedly connected to the inside of the groove. A conduit (206) is communicated with the inner side of the storage bladder (201). The other end of the conduit (206) communicates with the installation cavity.

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