Coal mine shaft grouting waterproof reinforcing method and device

Abstract

The application discloses a coal mine shaft grouting waterproof reinforcing method and device, relates to the technical field of grouting shaft waterproof, and discloses the technical key points including a grouting waterproof plug rod, an inner ring groove is formed in the middle of the outer wall of the grouting waterproof plug rod, a rubber sleeve is attached to the inner side of the inner ring groove, the outer diameter of the rubber sleeve is smaller than the outer diameter of the grouting waterproof plug rod, the installation of the grouting waterproof plug rod can be not affected, an injection port is arranged at one end of the grouting waterproof plug rod, a anti-extrusion part is arranged at one end of the inner side of the inner ring groove, a reset recovery part is arranged inside the other end of the grouting waterproof plug rod, technical effects are that only a small amount of slurry needs to be injected, the rubber sleeve is expanded, sufficient sealing of the water permeation position is realized, the slurry does not need to be solidified, the slurry does not come into contact with water, and the pushing force generated during the expansion of the rubber sleeve is utilized to push the anti-extrusion piece outward, so that a blocking structure greater than the drilling hole is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grouting wellbore waterproofing, in particular to a coal mine wellbore grouting waterproofing and reinforcing method and device. BACKGROUND

[0002] In coal mining operations, the safety and stability of the wellbore are the foundation for efficient and continuous coal mining. With the increasing depth of coal resource mining, the geological conditions are becoming increasingly complex and diverse. In the strata of many coal mine areas, there are water-rich layers. The water pressure of these water-rich layers is large. Once connected with the wellbore during construction or operation, it will cause a large amount of gushing water, seriously threatening the safety of construction personnel, greatly increasing the cost of drainage, and even possibly causing the wellbore to be flooded, causing the entire coal mining work to come to a standstill.

[0003] At the same time, broken and loose rock formations also pose a great challenge to wellbore construction. Under such geological conditions, the wellbore wall is difficult to maintain its stability and is prone to deformation, collapse and other conditions, not only delaying the construction period, but also causing huge economic losses. To effectively address the above problems and ensure the safe construction and long-term stable operation of the coal mine wellbore, coal mine wellbore grouting technology has emerged. By injecting a specific slurry into the rock formations around the wellbore, multiple goals such as plugging the water gushing channel, reinforcing the broken rock formations, and enhancing the stability of the wellbore wall can be achieved, providing a solid guarantee for the smooth development of coal mining operations.

[0004] However, the existing grouting waterproofing method requires a large amount of grouting, and the grout after grouting is in a water-containing atmosphere, which requires a longer time for curing, and in the curing process, water flow is easy to form a water-permeable channel again in the grout. SUMMARY

[0005] To overcome the deficiencies of the prior art, the present application provides a coal mine wellbore grouting waterproofing and reinforcing method and device which can solve the above technical problems.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a coal mine wellbore grouting waterproofing and reinforcing method and device, comprising a grouting waterproofing rod, an inner ring groove is formed in the middle of the outer wall of the grouting waterproofing rod, a rubber sleeve is attached to the inner side of the inner ring groove, the outer diameter of the rubber sleeve is smaller than the outer diameter of the grouting waterproofing rod, which can not affect the installation of the grouting waterproofing rod, an injection port is installed at one end of the grouting waterproofing rod, a anti-disengagement component is provided at one end of the inner side of the inner ring groove, a reset and recovery component is installed inside the other end of the grouting waterproofing rod.

[0007] The anti-extrusion part comprises a sliding end ring slidably arranged inside the grouting waterproof plug rod, one side of the sliding end ring is connected with a sliding plug ring, one end of the sliding plug ring is provided with a plug-in inclined surface, the other end of the grouting waterproof plug rod is symmetrically provided with an anti-extrusion stop piece, and the anti-extrusion stop piece is provided with a plug-in inclined groove at the side corresponding to the plug-in inclined surface.

[0008] The reset recovery part comprises an installation cavity provided in the other end of the grouting waterproof plug rod, and a rotating rod is rotatably arranged on the inner side of the installation cavity.

[0009] Preferably, the rubber sleeve is made of rubber material, and a cavity is formed in the inner side of the rubber sleeve. The rubber sleeve can be expanded to achieve sufficient sealing of the water permeable part. At the same time, expansion thrust can be generated during the expansion process.

[0010] Preferably, the injection port is in communication with the cavity in the rubber sleeve, and is used for injecting fluid into the rubber sleeve. The fluid can be liquid or gas, and the rubber sleeve can be expanded.

[0011] Preferably, a chamfer is formed at the edge of the other end of the grouting waterproof plug rod, and the chamfer is arc-shaped, so that the grouting waterproof plug rod can be smoothly installed.

[0012] Preferably, a sliding groove is formed in the inner side of the grouting waterproof plug rod and corresponds to the sliding plug ring, and a receiving groove is formed in the outer wall of the grouting waterproof plug rod and corresponds to the anti-extrusion stop piece, and the sliding groove is connected to the receiving groove.

[0013] Preferably, the inclination angle of the plug-in inclined surface is matched with the plug-in inclined groove, so as to slide the sliding plug ring into the anti-extrusion stop piece, move the anti-extrusion stop piece outward, and form a barrier by the protruding part, so as to prevent the grouting waterproof plug rod from sliding off the installation position. It should be noted that the plug-in inclined groove and the plug-in inclined surface have a height difference in the initial state.

[0014] Preferably, a plurality of reset springs are arranged on one side of the sliding end ring and outside the sliding plug ring, a recovery cavity is formed in the grouting waterproof plug rod and corresponds to the reset spring, one end of the reset spring is fixedly connected with the inner bottom end of the recovery cavity, and the reset spring is used to provide reset force for the reset of the sliding end ring and the sliding plug ring.

[0015] Preferably, a spacing distance is arranged between the two pull ropes, a wire passing hole is formed in the grouting waterproof plug rod and corresponds to the two anti-extrusion stop pieces, the wire passing hole is connected to the receiving groove, and one end of each of the two pull ropes is connected with the lower end of the two anti-extrusion stop pieces. During the lifting process of the anti-extrusion stop piece, the lifting force can be transmitted to the rotating rod through the pull rope, so as to provide power for the rotation of the rotating rod.

[0016] Preferably, the two ends of the rotating reset spring are fixedly connected with the rotating rod and the grouting waterproof plug rod respectively, the outer side of the mounting cavity is connected with an end cover, the end cover is installed through screws, and the mounting cavity is rotationally connected with the end cover, so that the maintenance and replacement of the grouting waterproof plug rod in the later period are facilitated.

[0017] Compared with the prior art, the coal mine shaft grouting waterproof reinforcement method and device have the following beneficial effects: through the design of the rubber sleeve, only a small amount of slurry needs to be injected to expand the rubber sleeve, sufficient sealing of the water permeation position is realized, the slurry does not need to be solidified, and the slurry does not come into contact with water, and the outward pushing of the anti-extraction stop piece is realized by using the pushing force generated in the expansion process of the rubber sleeve, so that a blocking structure larger than the drill hole is formed, the grouting waterproof plug rod is prevented from being pushed out of the drill hole due to water permeation water pressure, and serious water permeation is avoided, and meanwhile, the automatic retraction design of the anti-extraction stop piece facilitates the maintenance and replacement in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present application;

[0019] Figure 2 It is a disassembled structural schematic diagram of the end cover in the present application;

[0020] Figure 3 It is a structural schematic diagram of the other side of the present application;

[0021] Figure 4 It is a structural schematic diagram of the sliding insertion ring and the anti-extraction stop piece in the present application;

[0022] Figure 5 It is a structural schematic diagram of the anti-extraction stop piece in the present application;

[0023] Figure 6 It is a structural schematic diagram of the partial section in the present application;

[0024] Figure 7 It is a structural schematic diagram of the cross-section initial state of the present application;

[0025] Figure 8 It is a structural schematic diagram of the cross-section waterproof state of the present application.

[0026] In the drawing: 1, grouting waterproof plug rod; 11, inner ring groove; 12, chamfer;

[0027] 2, rubber sleeve; 21, injection port;

[0028] 3, sliding end ring; 31, sliding insertion ring; 32, reset spring; 33, anti-extraction stop piece; 34, storage groove; 35, insertion inclined surface; 36, insertion inclined groove; 37, sliding groove; 38, recovery cavity;

[0029] 4, mounting cavity; 41, rotating rod; 42, pull rope; 43, wire hole; 44, end cover; 45, rotating reset spring. DETAILED DESCRIPTION

[0030] In the present application, the orientation such as "up, down" is generally directed to the direction shown in the drawings, or is directed to the vertical, perpendicular or gravity direction, unless otherwise stated; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component, but the above orientation words are not used to limit the present application.

[0031] Please refer to Figures 1-8 The present application provides a coal mine shaft grouting waterproof reinforcement method and device technical scheme:

[0032] Embodiment one, a coal mine shaft grouting waterproof reinforcement method and device, comprising a grouting waterproof plug 1, an inner ring groove 11 is formed in the middle of the outer wall of the grouting waterproof plug 1, a rubber sleeve 2 is attached to the inner side of the inner ring groove 11, the outer diameter of the rubber sleeve 2 is smaller than the outer diameter of the grouting waterproof plug 1, which can not affect the installation of the grouting waterproof plug 1, a grouting inlet 21 is installed at one end of the grouting waterproof plug 1, a anti-extrusion component is provided at one end of the inner side of the inner ring groove 11, a reset recovery component is installed inside the other end of the grouting waterproof plug 1;

[0033] The anti-extrusion component comprises a sliding end ring 3 which is slidably arranged inside the grouting waterproof plug 1, one side of the sliding end ring 3 is connected with a sliding plug ring 31, one end of the sliding plug ring 31 is provided with a plug-in inclined surface 35, anti-extrusion flaps 33 are symmetrically and slidably arranged at the outer wall of the other end of the grouting waterproof plug 1, an insertion inclined groove 36 is formed at one side of the anti-extrusion flap 33 and corresponds to the plug-in inclined surface 35;

[0034] The reset recovery component comprises a mounting cavity 4 formed in the other end of the grouting waterproof plug 1, a rotating rod 41 is rotatably installed at the inner side of the mounting cavity 4, two pull ropes 42 are wound around one end of the outer wall of the rotating rod 41, and a rotating reset spring 45 is installed at the other end of the outer wall of the rotating rod 41;

[0035] The rubber sleeve 2 is made of rubber material, a cavity is formed in the inside of the rubber sleeve 2, the rubber sleeve 2 can be expanded to achieve full sealing of the water permeable part, and an expansion thrust can be generated during the expansion process, the grouting inlet 21 is in communication with the cavity inside the rubber sleeve 2, and is used for injecting grout into the rubber sleeve 2, the grout is a liquid that does not solidify, and the rubber sleeve 2 can be expanded, a chamfer 12 is formed at the edge of the other end of the grouting waterproof plug 1, the chamfer 12 is arc-shaped, and the grouting waterproof plug 1 can be smoothly installed.

[0036] The embodiment two, the inner side of the grouting waterproof plug rod 1 is provided with a sliding groove 37 corresponding to the sliding ring 31, the outer wall of the grouting waterproof plug rod 1 is provided with a receiving groove 34 corresponding to the anti-falling piece 33, the sliding groove 37 is through to the receiving groove 34, the inclined angle of the plug-in inclined surface 35 is matched with the plug-in inclined groove 36, which is used for sliding the sliding ring 31 into the anti-falling piece 33, realizing the outward pushing of the anti-falling piece 33, and forming a block by the protruding part, preventing the grouting waterproof plug rod 1 from slipping off the installation place, it should be noted that the anti-falling piece 33 is in the initial state, the plug-in inclined groove 36 and the plug-in inclined surface 35 have a height difference, a plurality of reset springs 32 are arranged on one side of the sliding end ring 3 and outside the sliding ring 31, the grouting waterproof plug rod 1 is provided with a recovery cavity 38 corresponding to the reset spring 32, one end of the reset spring 32 is fixedly connected with the inner bottom end of the recovery cavity 38, and the reset spring 32 is used for providing a reset force for the reset of the sliding end ring 3 and the sliding ring 31.

[0037] The embodiment three, the two pull ropes 42 are provided with a spacing distance, the grouting waterproof plug rod 1 is provided with a wire passing hole 43 corresponding to the two anti-falling pieces 33, the wire passing hole 43 is through to the receiving groove 34, one end of the two pull ropes 42 is connected with the lower end of the two anti-falling pieces 33 respectively, in the lifting process of the anti-falling piece 33, the lifting pulling force can be transmitted to the rotating rod 41 through the pull rope 42, and power is provided for the rotation of the rotating rod 41, the two ends of the rotary reset spring 45 are fixedly connected with the rotating rod 41 and the grouting waterproof plug rod 1 respectively, the outer side of the mounting cavity 4 is provided with an end cover 44, the end cover 44 is installed through screws, and the mounting cavity 4 and the end cover 44 are rotationally connected, so that the maintenance and replacement of the grouting waterproof plug rod 1 are facilitated.

[0038] In specific use, when the coal mine shaft is waterproofed and reinforced, first, drilling is performed at the water leakage position of the shaft wall, the drilling is performed from the inner wall of the shaft to the outer wall, the hole diameter of the drilling is matched with the maximum outer diameter of the grouting waterproof plug rod 1, after the drilling is completed, the design is inserted into the drilling position of the shaft, at the same time, the anti-falling piece 33 of the grouting waterproof plug rod 1 is located outside the outer wall of the shaft, liquid is injected into the rubber sleeve 2 through the injection port 21, after the liquid enters the rubber sleeve 2, the rubber sleeve 2 is expanded and the hole wall is sealed, so that the water permeation of the shaft is prevented.

[0039] In the process of expansion of the rubber sleeve 2, the sliding end ring 3 and the sliding insertion ring 31 are pushed to slide, and the insertion inclined surface 35 of the sliding insertion ring 31 is inserted into the upper end of the insertion inclined groove 36. With the continuous expansion of the rubber sleeve 2, the sliding insertion ring 31 is further pushed to slide into the insertion inclined groove 36, and the anti-disengagement piece 33 is pushed outward by the insertion inclined surface 35, thereby forming a blocking structure larger than the drill hole, avoiding the serious water leakage caused by the water pressure pushing the grouting waterproof plug 1 out of the drill hole.

[0040] In the process of sliding of the sliding end ring 3, the reset spring 32 is compressed, and at the same time, the anti-disengagement piece 33 is pushed outward, which generates a pulling force on the pull rope 42 and pulls the rotating rod 41 to rotate, thereby paying out the pull rope 42. At the same time, the rotating rod 41 is also tightened with the rotating reset spring 45. When the grouting waterproof plug 1 needs to be repaired and replaced later, the liquid in the rubber sleeve 2 is only needed to be discharged, and then the rubber sleeve 2 will shrink under the action of the elastic force. After the rubber sleeve 2 shrinks, the pushing force on the sliding end ring 3 is naturally lost, the compressed reset spring 32 pushes the sliding end ring 3 and the sliding insertion ring 31 to slide, and the sliding insertion ring 31 slides out of the anti-disengagement piece 33. In the process of sliding out of the sliding insertion ring 31, the pushing force on the anti-disengagement piece 33 is also lost. Under the action of the elastic force of the rotating reset spring 45, the rotating rod 41 is rewound, and the anti-disengagement piece 33 is pulled back into the storage groove 34. Thus, the grouting waterproof plug 1 can be taken out of the drill hole for repair or replacement.

[0041] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the basically same technical problem and realize the basically same technical effect is covered in the protection scope of the present application.

Claims

1. A coal mine shaft grouting waterproofing reinforcement device, comprising a grouting waterproofing insert rod (1), characterized in that: The outer wall of the grouting waterproofing insert (1) is provided with an inner ring groove (11), and a rubber sleeve (2) is attached to the inner side of the inner ring groove (11). An injection port (21) is installed at one end of the grouting waterproofing insert (1). An anti-detachment component is provided at one end of the inner ring groove (11), and a reset and recycling component is installed inside the other end of the grouting waterproofing insert (1). The anti-detachment component includes a sliding end ring (3) that can be slidably disposed inside the grouting waterproof insert (1). A sliding insert ring (31) is connected to one side of the sliding end ring (3). An insertion inclined surface (35) is provided at one end of the sliding insert ring (31). Anti-detachment baffles (33) are symmetrically slidably inserted at the outer wall of the other end of the grouting waterproof insert (1). An insertion inclined groove (36) is provided on one side of the anti-detachment baffle (33) and at the position corresponding to the insertion inclined surface (35). The reset and recovery component includes an installation cavity (4) opened inside the other end of the grouting waterproof insert (1), a rotating rod (41) is rotatably installed on the inner side of the installation cavity (4), two pull ropes (42) are wound around one end of the outer wall of the rotating rod (41), and a rotating reset spring (45) is installed on the other end of the outer wall of the rotating rod (41). The rubber sleeve (2) is made of rubber, and the inside of the rubber sleeve (2) has a cavity; The injection port (21) is connected to the cavity inside the rubber sleeve (2) and is used to inject slurry into the rubber sleeve (2); A sliding groove (37) is provided on the inner side of the grouting waterproof insert (1) and at the position corresponding to the sliding insert ring (31). A storage groove (34) is provided on the outer wall of the grouting waterproof insert (1) and at the position corresponding to the anti-detachment baffle (33). The sliding groove (37) extends to the storage groove (34). The inclined angle of the insertion slope (35) is adapted to the insertion groove (36) for slidingly inserting the sliding ring (31) into the anti-detachment baffle (33); Multiple reset springs (32) are installed on one side of the sliding end ring (3) and outside the sliding insert ring (31). A recovery cavity (38) is opened at the corresponding position of the grouting waterproof insert rod (1) and the reset spring (32). One end of the reset spring (32) is fixedly connected to the bottom of the recovery cavity (38). A gap is provided between the two pull ropes (42). The grouting waterproof insert (1) has a wire hole (43) inside and corresponding to the two anti-detachment baffles (33). The wire hole (43) extends to the storage groove (34). One end of the two pull ropes (42) is connected to the lower end of the two anti-detachment baffles (33). The two ends of the rotary reset spring (45) are fixedly connected to the rotating rod (41) and the grouting waterproofing plug (1) respectively, and the outer side of the mounting cavity (4) is covered with an end cap (44).

2. The coal mine shaft grouting waterproofing and reinforcement device according to claim 1, characterized in that: The other end edge of the grouting waterproofing insert (1) is chamfered (12), and the chamfer (12) is arc-shaped.

3. A method for waterproofing and reinforcing a coal mine shaft grouting waterproofing and reinforcing device as described in any one of claims 1-2, characterized in that: When this design is used to waterproof and reinforce the coal mine shaft, firstly, a hole is drilled at the leaking part of the shaft wall. The hole is drilled from the inner wall of the shaft to the outer wall. The diameter of the hole is matched with the maximum outer diameter of the grouting waterproofing insert (1). After the hole is drilled, this design is inserted into the hole of the shaft. At the same time, the anti-detachment baffle (33) at the grouting waterproofing insert (1) is located on the outer side of the outer wall of the shaft. Liquid is injected into the rubber sleeve (2) through the injection port (21). After the liquid enters the rubber sleeve (2), it will cause the rubber sleeve (2) to expand and seal the hole wall, thus preventing water from penetrating the shaft. During the expansion of the rubber sleeve (2), the sliding end ring (3) and the sliding insertion ring (31) will slide, and the upper end of the insertion groove (36) at the insertion slope (35) of the sliding insertion ring (31) will be inserted. As the expansion of the rubber sleeve (2) continues, the sliding insertion ring (31) will slide further into the insertion groove (36), and the anti-detachment baffle (33) will be pushed outward with the help of the insertion slope (35), thereby forming a blocking structure larger than the borehole, so as to prevent the grouting waterproof insertion rod (1) from being pushed out of the borehole due to water pressure, resulting in serious water leakage. During the sliding process of the sliding end ring (3), the return spring (32) will be compressed. At the same time, the anti-detachment baffle (33) will also generate tension on the pull rope (42) as it pushes outward, and pull the rotating rod (41) to rotate. The pull rope (42) will be released, and the rotating rod (41) will also tighten the rotating return spring (45) as it rotates. When the grouting waterproof insert (1) needs to be inspected and replaced later, the liquid in the rubber sleeve (2) only needs to be drained, and the rubber sleeve (2) will shrink under the action of elasticity. After the rubber sleeve (2) shrinks, it will compress the sliding end ring (32). The thrust at point 3) is also lost, and the compressed return spring (32) will push the sliding end ring (3) and the sliding insert ring (31) to slide, and slide the sliding insert ring (31) out of the anti-detachment plate (33). During the sliding process, the thrust of the sliding insert ring (31) on the anti-detachment plate (33) will also be lost. Under the action of the rebound force of the rotating return spring (45), the rotating rod (41) will be re-wound and the anti-detachment plate (33) will be pulled back into the storage groove (34). The grouting waterproof insert rod (1) can then be taken out from the drill hole for inspection or replacement.

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