Mine curtain grouting and water plugging device and grouting and water plugging method

Abstract

The invention belongs to the technical field of underground waterproof engineering, and particularly discloses a mine curtain grouting and water plugging device and a grouting and water plugging method. One end of a stabilizing unit of the device is fixed with a grouting and water plugging unit, and the other end of the stabilizing unit is detachably fixed in a clamping hole; a sealing plate of the grouting and water plugging unit sleeves a water distribution pipe, a filter screen cover slidably sleeves one end of the water distribution pipe, a water swelling material is fixed to the water distribution pipe, the water distribution pipe can extend into a reserved guide hole, a water pressure balance pipe is vertically fixed to the water distribution pipe, a connecting pipe is fixed to the top end of the water pressure balance pipe, and the bottom end of the connecting pipe is connected with a grouting pipe. The grouting pipe sequentially penetrates through the water pressure balance pipe and the water distribution pipe and extends into the filter screen cover, a water closing valve is arranged on one side of the water distribution pipe, a water distribution opening is formed in the end face of the water distribution pipe, and a grout supplementing pipe is arranged on the outer wall of the water distribution pipe and provided with an observation valve. The method comprises the steps of device fixing, grouting and water plugging construction, pressure grouting and device dismantling. The grouting device has the advantages of being high in grouting efficiency, stable and reliable in grouting, convenient to assemble and disassemble and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of underground waterproof engineering, and in particular to a mine curtain grouting water blocking device and a grouting water blocking method with high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost. Background Art

[0002] In the process of mining, it is inevitable that water seepage and water gushing will occur. This is generally because there are water-conducting rock cracks or karst channels in the rock and soil layer on the side wall of the mine. Under the action of diagenesis and weathering, the rock is broken, resulting in increased permeability, thereby accumulating groundwater or becoming a channel for groundwater flow. Therefore, a curtain grouting water blocking device is generally used. By injecting slurry into the cracks or karst channels in the rock, the slurry is infiltrated and diffused along the cracks or karst channels and solidified and hardened, thereby forming a curtain to prevent groundwater infiltration on the main water gushing channel between the water source and the mine or mining area; this curtain is essentially a method of drilling and pouring slurry, which changes the permeability of the rock formation in certain sections of the ore bed water filling path, and effectively intercepts a large amount of groundwater outside the curtain. Curtain grouting can significantly reduce the outflow of underground water, thereby reducing the occurrence of casualties and major accidents caused by mine water gushing; by effectively blocking water gushing, a favorable environment is created for safe production in mining.

[0003] At present, during the grouting and water plugging process of the rock and soil layer on the side wall of a mine, when the pipe is inserted into the rock and soil layer, the high-pressure flowing groundwater contained in the rock and soil layer will seep out or even gush out through the pipe insertion port, which not only causes part or all of the injected slurry to be lost with the water flow and difficult to form, seriously affecting the work efficiency of grouting and water plugging, but also often fails to completely seal the leaking holes, resulting in poor actual sealing effect.

[0004] In order to solve the above problems in the prior art, a water diversion pipe that can be inserted into the leaking hole is provided to lead water out of the pipe, and a filter screen is wrapped on the outer wall of the bottom of the water diversion pipe to prevent the water flow from scouring the wall of the leaking hole and causing the leakage point to continue to expand; then, a water distribution pipe, a water pressure balance pipe and a grouting pipe are connected to the outer end of the water diversion pipe through a flange, and the water head pressure in the water pressure balance pipe is balanced with the water pressure in the leaking hole to keep the water in the leaking hole still so as to improve the grouting quality and efficiency, while the water diversion pipe can lead out the water flow in the water diversion pipe, and the grouting pipe can perform high-pressure grouting in the later stage; and inclined reinforcement bars are provided on both sides of the water diversion pipe, and the inclined reinforcement bars are connected to the curtain wall by embedded reinforcement grouting or expansion bolts to prevent the water diversion pipe in the leaking hole from being washed out by water pressure. However, since the outer wall of the aforementioned water diversion pipe is wrapped with a filter, and the grouting is firmly combined with the filter after solidification, the water diversion pipe is difficult to be pulled out from the leaking hole. Therefore, it can only be removed from the flange connection point, so that the water diversion pipe can only be used once, which is costly. Moreover, the inclined reinforcement connected to the curtain wall by embedded grouting or expansion bolts requires embedded grouting or expansion bolts to be driven in advance each time it is fixed. Not only is the process cumbersome and the disassembly and assembly efficiency low, but also because the embedded grouting or expansion bolts can only be used once, it also increases the cost of grouting and water blocking. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a mine curtain grouting and water blocking device with high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost, and also provides a mine curtain grouting and water blocking method.

[0006] The mine curtain grouting and water blocking device of the present invention is realized as follows: it comprises a grouting and water blocking unit and a stabilizing unit, one end of the grouting and water blocking unit can be inserted into a reserved guide hole of a curtain body, one end of the stabilizing unit is connected to the grouting and water blocking unit and the other end is detachably fixed in a clamping hole of the curtain body; The grouting water blocking unit includes a water distribution pipe, a sealing plate, a water-swelling material, a filter cover, a water pressure balance pipe, and a connecting pipe. The sealing plate is an annular structure and is coaxially fixedly sleeved on the water distribution pipe. The filter cover is slidably sleeved on one end of the water distribution pipe. The water-swelling material is fixedly wound on the water distribution pipe between the filter cover and the sealing plate. The water distribution pipe sleeve is provided with a water-swelling material and a side of the filter cover that can be slidably extended into the reserved guide hole of the curtain body, and the end face of the sealing plate is in contact with the outer side wall of the curtain body. The water pressure balance pipe is vertically It is fixed on the water distribution pipe away from the filter cover and connected with the water distribution pipe, the connecting pipe is fixedly arranged at one end of the water pressure balance pipe away from the water distribution pipe, the bottom end of the connecting pipe is connected and fixed with a grouting pipe, the grouting pipe sequentially passes through the water pressure balance pipe and the water distribution pipe and extends into the filter cover, the water distribution pipe is provided with a water shut-off valve on the side of the water pressure balance pipe away from the filter cover, the water distribution pipe is provided with a water distribution port at one end away from the filter cover, the water distribution pipe is further provided with a grouting pipe between the water shut-off valve and the sealing plate, and the grouting pipe is provided with an observation valve.

[0007] Furthermore, the two ends of the water-swellable material are respectively abutted against the end surfaces of the filter cover and the sealing plate, the bottom end of the connecting pipe is connected to the water pressure balance pipe, and a water pressure cap is detachably fixed on the top end of the connecting pipe and / or the water outlet of the water distribution pipe.

[0008] Furthermore, the stabilizing unit comprises a fixed plate, a support rod, a clamping plate, a clamping rod, a guide column, a guide rod, a guide block, and a clamping block. The fixed plate is fixedly arranged on the outer wall between the sealing plate and the water pressure balance pipe of the water distribution pipe. At least two support rods are evenly distributed on the outer circumference of the water distribution pipe. One end of the support rod is connected to the fixed plate and the other end is connected to the clamping plate. The clamping rod slides through the clamping plate and can be slidably extended into the clamping hole of the curtain body. The guide column is slidably arranged in the sliding hole I extending along the axis of the clamping rod. Both ends of the guide rod The guide blocks are respectively fixedly connected to the guide pillar and the outside of the clamping rod, and the guide pillar can be pushed and pulled to make the guide pillar move axially in the sliding hole I. The outer wall of the clamping rod away from the guide block is circumferentially evenly provided with at least two guide holes connected to the sliding hole I. The clamping block is slidably arranged in the guide hole of the clamping rod and the bottom end abuts against the guide pillar. The guide pillar is provided with a connecting part that can push the clamping block to move outward and retract inward in the guide hole. The clamping block moves out of the guide hole and can be inserted into the side wall of the clamping hole. A reset mechanism that pushes the clamping block to retract inward is also provided on one side of the guide hole of the clamping rod.

[0009] Furthermore, a card slot is provided on the side wall of the card hole, and the card block can be slidably extended into the card slot when moved out of the guide hole; the connecting part on the guide column is a conical head or an annular groove, and the bottom end of the card block is an arc structure.

[0010] Furthermore, the reset mechanism includes a reset groove, a slide plate, and a reset spring. The reset groove is arranged on one side of the guide hole of the clamping rod and is connected to the guide hole. The slide plate is slidably arranged in the reset groove and one end is fixedly connected to the clamping block. The reset spring is movably arranged in the reset groove on one side of the slide plate away from the guide column and its two ends are respectively abutted against the side wall of the reset groove and the end face of the slide plate.

[0011] Furthermore, an anti-slip mechanism is provided between the guide block and the clamping plate, and the anti-slip mechanism includes a limiting ring, a torsion spring, a limiting rod, a pull rope, a pull plate, and a pull rod. The limiting ring is fixedly arranged in a sliding hole I at an end of the clamping rod away from the clamping block, the torsion spring is fixedly arranged on a side of the guide block facing the clamping rod, and at least two limiting rods are evenly distributed circumferentially between the guide block and the clamping rod, one end of the limiting rod is fixedly connected to the torsion spring and the other end extends to a side of the limiting ring away from the guide block, an axially extending sliding hole II is provided on a side of the guide rod close to the guide block, the pull plate is slidably arranged in the sliding hole II, the pull rod is movably arranged in the sliding hole II and one end movably extends to the outside of the guide block and the other end is fixedly connected to the pull plate, the pull rope movably passes through the side wall of the guide rod and the two ends are respectively fixedly connected to the pull plate and the limiting rod.

[0012] Furthermore, the sliding hole II is a blind hole or a stepped hole, and an anti-loosening spring is movably arranged on the side of the pull plate away from the guide block, and the two ends of the anti-loosening spring are respectively abutted against the end faces of the pull plate and the sliding hole II.

[0013] The mine curtain grouting water blocking method of the present invention is implemented as follows: based on the aforementioned mine curtain grouting water blocking device, it includes the steps of fixing the grouting water blocking device, grouting water blocking construction, pressure grouting, and removing the grouting water blocking device, and the specific contents are: A. Fixing of grouting water plugging device: Find the leaking crack inside the curtain body, then open a reserved guide hole on the side of the leaking crack, and open a clamping hole on the side of the reserved guide hole of the curtain body, then insert one side of the water distribution pipe into the reserved guide hole, and then insert the side of the stabilizing unit away from the water distribution pipe into the clamping hole and fix it; B. Grouting and water blocking construction: Close the water shut-off valve on the water distribution pipe, then start the grouting pump, and inject the pre-mixed slurry into the leaking cracks inside the curtain body through the grouting pipe. After the grouting is finally set, fill the leaking cracks to block the water; C. Pressure grouting: After the slurry injected through the grouting pipe has finally set, the grouting pipe is cut off at the top of the hydraulic balance pipe and the top of the connecting pipe is sealed with a hydraulic cap. Then, the observation valve on the grouting pipe is opened and pressure grouting is performed. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and the grouting is stopped. E. Removal of the grouting and water blocking device: After the grouting reaches the predetermined strength or the predetermined time, loosen the stabilizing unit and pull out the clamping hole, then pull out the water distribution pipe from the reserved guide hole, and separate the grouting and water blocking device from the curtain body in preparation for repeated grouting and water blocking.

[0014] Furthermore, in step A, after one side of the water distribution pipe is inserted into the reserved guide hole, the water distribution pipe is then rotated to drive the support rod and the clamping plate to align with the clamping hole opened on the side of the reserved guide hole, and then the clamping rod is slid into the clamping hole on the side away from the support rod. When the clamping rod is inserted into the clamping hole, the guide block is pushed to drive the guide rod and the guide column to slide into the sliding hole I of the clamping rod, and the sliding guide column squeezes the clamping block, and the squeezed clamping block moves out of the guide hole and is inserted into the clamping groove inside the clamping hole.

[0015] Furthermore, in step B, before grouting, the water shut-off valve is opened to allow the seepage water in the leaking cracks to flow out from the water outlet of the water distribution pipe; during the grouting process, the observation valve on the grouting pipe is opened, and when slurry returns from the opening of the grouting pipe and reaches a predetermined concentration, the grouting is stopped and the observation valve is closed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The grouting and water blocking device of the present invention inserts a water distribution pipe into the reserved guide hole so that the sealing plate on the water distribution pipe covers the end face of the reserved guide hole to seal the opening of the reserved guide hole and limit the water distribution pipe. At the same time, the water-swelling material on the water distribution pipe quickly expands when it comes into contact with water to seal the gap between the water distribution pipe and the reserved guide hole, thereby preventing the water flow from scouring the hole wall of the reserved guide hole and causing the leakage point to continue to expand; and a water pressure balance pipe, a grouting pipe and a water shut-off valve are connected to the outside of the water distribution pipe. The water pressure balance pipe can balance the water head pressure with the water pressure in the hole to improve the grouting efficiency, and the water shut-off valve can guide the water flow in the water distribution pipe, and the grouting pipe can perform high-pressure grouting in the later stage; and a stabilizing unit is provided, one end of which is connected to the grouting and water blocking unit and the other end of which is detachably fixed in the clamping hole of the curtain body, thereby preventing the water distribution pipe in the reserved guide hole from being washed out by water pressure and preventing the entire device from shaking during the grouting process to affect the grouting quality.

[0017] 2. The grouting and water blocking device of the present invention enables the filter cover to be slidably mounted on one end of the water distribution pipe. During disassembly, the filter cover integrated with the solidified grouting can be slid off and left in the reserved guide hole. Moreover, since the water-swelling material is fixedly wound around the water distribution pipe between the filter cover and the sealing plate, the water-swelling material will not block the water distribution pipe from being pulled out axially during disassembly, thereby solving the problem that the water distribution pipe is difficult to be pulled out from the reserved guide hole at a later stage. Not only can the water distribution pipe inserted into the reserved guide hole be reused, thus reducing the cost of grouting and water blocking, but the pull-out design is more efficient than removing the flange connection.

[0018] 3. The stabilizing unit of the grouting and water blocking device of the present invention can push the block to move in the guide hole of the clamping rod by pushing and pulling the guide column to control the axial movement in the sliding hole I of the clamping rod through the guide block, so as to control the block to be inserted into the side wall of the clamping hole or to be retracted from the side wall of the clamping hole back into the guide hole of the clamping rod, so as to realize the clamping fixation or release of the connection between the clamping rod and the clamping hole, and then realize the connection or disassembly of the stabilizing unit and the curtain body; since the connection only requires the opening of the clamping hole on the curtain body, compared with the existing grouting or expansion bolt connection, not only is the process simple and the efficiency of clamping and disassembly is high, but also the overall stabilizing unit can be reused, reducing the cost of grouting and water blocking. In particular, a reset mechanism is set on the side of the block, which can improve the reliability of the block retracting back into the guide hole of the clamping rod during removal; and an anti-slip mechanism is set on the outside of the clamping rod, which can avoid the instability of the connection between the device and the curtain body caused by the sliding of the guide column due to vibration during grouting, thereby improving the reliability of the device connection.

[0019] In summary, the present invention has the characteristics of high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the mine curtain grouting and water blocking device of the present invention in use state; Figure 2 It is a half-section schematic diagram of the mine curtain grouting and water blocking device of the present invention in use state; Figure 3 It is a schematic structural diagram of the mine curtain grouting water blocking device of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle; Figure 7 It is a schematic diagram of the limit rod structure of the present invention; Figure 8 It is a flow chart of the mine curtain grouting water blocking method of the present invention; In the figure: 1-curtain body, 11-reserved guide hole, 12-card hole, 13-card slot, 14-leakage crack, 2-grouting and water blocking unit, 21-water distribution pipe, 22-sealing plate, 23-water swelling material, 24-filter cover, 25-water pressure balance pipe, 26-connecting pipe, 27-grouting pipe, 28-water shut-off valve, 29-grouting pipe, 2A-water pressure cap, 3-stabilizing unit, 31-fixed Plate, 32-support rod, 33-clamping plate, 34-clamping rod, 35-guide column, 36-guide rod, 37-guide block, 38-clamping block, 4-reset mechanism, 41-reset groove, 42-slide plate, 43-reset spring, 5-anti-slip mechanism, 51-limiting ring, 52-torsion spring, 53-limiting rod, 54-pull rope, 55-pull plate, 56-pull rod, 57-slide hole II, 58-anti-loosening spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figures 1 to 7 As shown, the mine curtain grouting and water blocking device of the present invention comprises a grouting and water blocking unit 2 and a stabilizing unit 3. One end of the grouting and water blocking unit 2 can be inserted into the reserved guide hole 11 of the curtain body 1. One end of the stabilizing unit 3 is connected to the grouting and water blocking unit 2 and the other end is detachably fixed in the clamping hole 12 of the curtain body 1. The grouting and water blocking unit 2 includes a water distribution pipe 21, a sealing plate 22, a water-swelling material 23, a filter cover 24, a water pressure balance pipe 25, and a connecting pipe 26. The sealing plate 22 is an annular structure and is coaxially fixedly sleeved on the water distribution pipe 21. The filter cover 24 is slidably sleeved on one end of the water distribution pipe 21. The water-swelling material 23 is fixedly wound on the water distribution pipe 21 between the filter cover 24 and the sealing plate 22. One side of the water distribution pipe 21, which is sleeved with the water-swelling material 23 and the filter cover 24, can be slidably extended into the reserved guide hole 11 of the curtain body 1, and the end face of the sealing plate 22 is in contact with the outer side wall of the curtain body 1. The water pressure balance pipe 25 is vertically fixed. The connecting pipe 26 is fixed on the water distribution pipe 21 away from the filter cover 24 and is connected with the water distribution pipe 21. The bottom end of the connecting pipe 26 is connected and fixed with a grouting pipe 27. The grouting pipe 27 passes through the water pressure balance pipe 25 and the water distribution pipe 21 in sequence and extends into the filter cover 24. The water distribution pipe 21 is provided with a water shut-off valve 28 on the side of the water pressure balance pipe 25 away from the filter cover 24. The water distribution pipe 21 is provided with a water outlet at one end away from the filter cover 24. The water distribution pipe 21 is also provided with a grouting pipe 29 between the water shut-off valve 28 and the sealing plate 22. The grouting pipe 29 is provided with an observation valve.

[0023] During operation, a reserved guide hole 11 is opened on the side of the leaking crack 14 of the curtain body 1, and then the water distribution pipe 21 is inserted into the reserved guide hole 11, and at the same time, the filter cover 24 and the water-swelling material 23 are driven to be inserted into the reserved guide hole 11. The water-swelling material 23 expands rapidly when it comes into contact with water to play a sealing role, and the sealing plate 22 covers the end face of the reserved guide hole 11 for sealing and limiting. Then, the grouting pump is started to inject the pre-prepared slurry into the grouting pipe 27, and the slurry is circulated to the inside of the leaking crack 14 through the filter cover 24 to fill it and play a water blocking role. When the grouting is completed, the water shut-off valve 28 and the observation valve are closed to stop the construction.

[0024] The two ends of the water-swellable material 23 are respectively in contact with the end surfaces of the filter cover 24 and the sealing plate 22, the bottom end of the connecting pipe 26 is connected to the water pressure balance pipe 25, and a water pressure cap 2A is detachably fixed on the top end of the connecting pipe 26 and / or the water outlet of the water distribution pipe 21.

[0025] The stabilizing unit 3 includes a fixing plate 31, a support rod 32, a clamping plate 33, a clamping rod 34, a guide column 35, a guide rod 36, a guide block 37, and a clamping block 38. The fixing plate 31 is fixedly arranged on the outer wall between the sealing plate 22 and the water pressure balance pipe 25 of the water distribution pipe 21. At least two support rods 32 are evenly distributed on the outer circumference of the water distribution pipe 21. One end of the support rod 32 is connected to the fixing plate 31 and the other end is connected to the clamping plate 33. The clamping rod 34 slides through the clamping plate 33 and can be slidably extended into the clamping hole 12 of the curtain body 1. The guide column 35 is slidably arranged in the sliding hole I extending along the axis of the clamping rod 34. The two ends of the rod 36 are fixedly connected to the guide column 35 and the guide block 37 on the outside of the clamping rod 34 respectively. The guide column 35 can be pushed and pulled by the guide block 37 to make the guide column 35 move axially in the sliding hole I. The outer wall of the clamping rod 34 away from the guide block 37 is circumferentially evenly distributed with at least two guide holes connected to the sliding hole I. The clamping block 38 is slidably arranged in the guide hole of the clamping rod 34 and the bottom end abuts against the guide column 35. The guide column 35 is provided with a connecting portion that can push the clamping block 38 to move outward and retract inward in the guide hole. The clamping block 38 moves out of the guide hole and can be inserted into the side wall of the clamping hole 12. A reset mechanism 4 that pushes the clamping block 38 to retract inward is also provided on one side of the guide hole of the clamping rod 34.

[0026] During operation, when the grouting pipe 27 shakes during the grouting process, the fixing plate 31 is installed on the water distribution pipe 21, so that the fixing plate 31 drives the support rod 32 and the clamping plate 33 to align with the clamping hole 12 opened at the end of the curtain body 1, and then the clamping rod 34 is inserted into the clamping hole 12, and then the guide block 37 is pushed to drive the guide rod 36 and the guide column 35 to be inserted into the sliding hole Ⅰ of the clamping rod 34, so that the surface of the guide column 35 squeezes the clamping block 38 to move into the clamping groove 13, so that the water distribution pipe 21 and the curtain body 1 are quickly fixed, reducing the shaking of the water distribution pipe 21 and the grouting pipe 27 during grouting.

[0027] The two ends of the support rod 32 are respectively hinged or fixedly connected to the fixing plate 31 and the clamping plate 33. The hinged structure can facilitate the connection of the support rod 32 with the uneven or inclined curtain body 1, thereby improving the flexibility of use; and the fixed connection structure can prevent the clamping rod 34 from being difficult to align due to the shaking of the support rod 32 after the water distribution pipe 21 is inserted into the reserved guide hole 11, thereby facilitating the alignment of the clamping rod 34 on the clamping plate 33 with the clamping hole 12 on the regular curtain body 1 to improve the installation efficiency.

[0028] A slot 13 is provided on the side wall of the engaging hole 12, and the block 38 can be moved out of the guide hole and slidably extended into the slot 13; the connecting portion on the guide column 35 is a conical head or an annular groove, and the bottom end of the block 38 is an arc-shaped structure.

[0029] The reset mechanism 4 includes a reset groove 41, a slide plate 42, and a reset spring 43. The reset groove 41 is arranged on one side of the guide hole of the clamping rod 34 and is connected to the guide hole. The slide plate 42 is slidably arranged in the reset groove 41 and one end is fixedly connected to the clamping block 38. The reset spring 43 is movably arranged in the reset groove 41 on one side of the slide plate 42 away from the guide column 35 and two ends thereof are respectively abutted against the side wall of the reset groove 41 and the end surface of the slide plate 42.

[0030] During operation, when the block 38 is squeezed and slides into the slot 13, the slide plate 42 is driven to slide in the reset slot 41 to squeeze the reset spring 43; when the stabilizing unit 3 needs to be disassembled, the guide block 37 is pulled to drive the guide rod 36 and the guide column 35 to slide out of the sliding hole Ⅰ of the connecting rod 34. At this time, the elastic force of the reset spring 43 pushes the slide plate 42 to drive the block 38 to move along the reset slot 41, so that the block 38 shrinks into the guide hole of the connecting rod 34, and the block 38 is separated from the slot 13 to facilitate the separation of the stabilizing unit 3 from the curtain body 1.

[0031] An anti-slip mechanism 5 is also provided between the guide block 37 and the clamping plate 33. The anti-slip mechanism 5 includes a limiting ring 51, a torsion spring 52, a limiting rod 53, a pull rope 54, a pull plate 55, and a pull rod 56. The limiting ring 51 is fixedly arranged in a sliding hole I at one end of the clamping rod 34 away from the clamping block 38. The torsion spring 52 is fixedly arranged on the side of the guide block 37 facing the clamping rod 34. At least two limiting rods 53 are evenly distributed circumferentially between the guide block 37 and the clamping rod 34. One end of the limiting rod 53 It is fixedly connected to the torsion spring 52 and the other end extends to the side of the limit ring 51 away from the guide block 37. The guide rod 36 is provided with an axially extending sliding hole II57 on the side close to the guide block 37. The pull plate 55 is slidably set in the sliding hole II57. The pull rod 56 is movably set in the sliding hole II57 and one end of it is movably extended to the outside of the guide block 37 and the other end is fixedly connected to the pull plate 55. The pull rope 54 movably passes through the side wall of the guide rod 36 and the two ends are respectively fixedly connected to the pull plate 55 and the limit rod 53.

[0032] During operation, when the guide block 37 drives the guide rod 36 to be inserted into the sliding hole Ⅰ of the clamping rod 34, the pull rod 56 is pulled to drive the pull plate 55 to slide toward the outer end surface of the guide block 37, and then the pull plate 55 pulls the limit rod 53 through the pull rope 54, and the elastic force generated by the torsion spring 52 causes the limit rod 53 to retract inward, so that the connecting end of the limit rod 53 is disengaged from the limit ring 51; and by pushing the pull rod 56, the connecting end of the limit rod 53 can be relaxed due to the relaxation of the pull rope 54, and the force acting on the torsion spring 52 disappears, so that the connecting end of the limit rod 53 moves outward and is clamped into the limit ring 51, thereby realizing the limitation and clamping of the end of the limit ring 51, and avoiding the problem of slipping of the guide block 37 and the guide column 35.

[0033] The slide hole II 57 is a blind hole or a stepped hole. The slide hole II 57 is provided with an anti-loosening spring 58 on the side of the pull plate 55 away from the guide block 37. The two ends of the anti-loosening spring 58 are respectively in contact with the end surface of the pull plate 55 and the slide hole II 57. The anti-loosening spring 58 has the effect of limiting and stretching and resetting.

[0034] like Figures 1 to 8 As shown, the mine curtain grouting water blocking method of the present invention is based on the aforementioned mine curtain grouting water blocking device, including the steps of fixing the grouting water blocking device, grouting water blocking construction, pressure grouting, and removing the grouting water blocking device, and the specific contents are: A. Fixing the grouting water blocking device: Find the leaking crack 14 inside the curtain body 1, then open a reserved guide hole 11 on the side of the leaking crack 14, and open a clamping hole 12 on the side of the reserved guide hole 11 of the curtain body 1, then insert one side of the water distribution pipe 21 into the reserved guide hole 11, and then insert the side of the stabilizing unit 3 away from the water distribution pipe 21 into the clamping hole 12 and fix it; B. Grouting and water blocking construction: close the water shut-off valve 28 on the water distribution pipe 21, then start the grouting pump, inject the pre-mixed slurry into the leaking cracks 14 inside the curtain body 1 through the grouting pipe 27, and fill the leaking cracks 14 after the grouting is finally set to block the water; C. Pressure grouting: After the slurry injected through the grouting pipe 27 has finally set, the grouting pipe 27 is cut off at the top of the hydraulic balance pipe 25 and the top of the connecting pipe 26 is sealed with a hydraulic cap 2A. Then, the observation valve on the grouting pipe 29 is opened and pressure grouting is performed. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and the grouting is stopped; E. Removal of the grouting and water blocking device: After the grouting reaches a predetermined strength or a predetermined time, loosen the stabilizing unit 3 and pull out the clamping hole 12, then pull out the water distribution pipe 21 from the reserved guide hole 11, and separate the grouting and water blocking device from the curtain body 1 in preparation for repeated grouting and water blocking.

[0035] In step A, after one side of the water distribution pipe 21 is inserted into the reserved guide hole 11, the water distribution pipe 21 is then rotated to drive the support rod 32 and the clamping plate 33 to align with the clamping hole 12 opened on the side of the reserved guide hole 11, and then the clamping rod 34 is slid into the clamping hole 12 away from the side of the support rod 32. When the clamping rod 34 is inserted into the clamping hole 12, the guide block 37 is pushed to drive the guide rod 36 and the guide column 35 to slide and insert into the sliding hole I of the clamping rod 34. The sliding guide column 35 squeezes the clamping block 38, and the squeezed clamping block 38 moves out of the guide hole and is inserted into the clamping groove 13 inside the clamping hole 12.

[0036] In the step B, before grouting, the water shut-off valve 28 is opened to allow the seepage water in the leaking fissure 14 to flow out from the water outlet of the water distribution pipe 21; during the grouting process, the observation valve on the grouting pipe 29 is opened, and when the opening of the grouting pipe 29 is filled with slurry and reaches a predetermined concentration, the grouting is stopped and the observation valve is closed. Opening the water shut-off valve 28 to drain water before grouting can reduce the water pressure in the hole to facilitate the installation of the device, while closing the water shut-off valve 28 during the grouting process can prevent the grouting from being lost with the water flow and being difficult to form, and at the same time, the water head pressure in the water pressure balance pipe 25 is balanced with the water pressure in the reserved guide hole 11, so that the water in the water distribution pipe 21 stops flowing, thereby facilitating grouting.

[0037] Example 1 like Figures 1 to 8 As shown in the figure, the specific process of mine curtain grouting water blocking construction is as follows: S100: Find the leaking crack 14 inside the curtain body 1, then open a reserved guide hole 11 on the side of the leaking crack 14, and open a snap-in hole 12 on the side of the reserved guide hole 11 of the curtain body 1, then insert one side of the water distribution pipe 21 into the reserved guide hole 11, then rotate the water distribution pipe 21 to drive the support rod 32 and the snap-in plate 33 to align with the snap-in hole 12 opened on the side of the reserved guide hole 11, and then slide the snap-in rod 34 away from the side of the support rod 32 into the snap-in hole 12, and when the snap-in rod 34 is inserted into the snap-in hole 12, by pushing the guide block 37, drive the guide rod 36 and the guide column 35 to slide and insert into the sliding hole I of the snap-in rod 34, the sliding guide column 35 squeezes the snap-in block 38, and the squeezed snap-in block 38 moves out of the guide hole and is inserted into the snap-in groove 13 inside the snap-in hole 12.

[0038] S200: Before grouting, open the water shut-off valve 28 to allow the seepage water in the leaking cracks 14 to flow out from the water outlet of the water distribution pipe 21; during the grouting process, close the water shut-off valve 28 on the water distribution pipe 21, and open the observation valve on the grouting pipe 29, then start the grouting pump to inject the pre-mixed slurry into the leaking cracks 14 inside the curtain body 1 through the grouting pipe 27, stop grouting and close the observation valve when slurry returns from the opening of the grouting pipe 29 and reaches a predetermined concentration, and fill the leaking cracks 14 after the grouting is finally set to play a water blocking role.

[0039] S300: After the slurry injected through the grouting pipe 27 has finally set, the grouting pipe 27 is cut off at the top of the hydraulic balance pipe 25 and the top of the connecting pipe 26 is sealed with the hydraulic cap 2A. Then, the observation valve on the grouting pipe 29 is opened and pressure grouting is performed. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and the grouting is stopped.

[0040] S400: After the grouting reaches a predetermined strength or a predetermined time, the stabilizing unit 3 is loosened and the clamping hole 12 is pulled out, and then the water distribution pipe 21 is pulled out of the reserved guide hole 11, and the grouting and water blocking device is separated from the curtain body 1 to prepare for repeated grouting and water blocking.

[0041] 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 changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A mine curtain grouting water blocking device, characterized in that: It comprises a grouting and water blocking unit (2) and a stabilizing unit (3), wherein one end of the grouting and water blocking unit (2) can be inserted into a reserved guide hole (11) of a curtain body (1), and one end of the stabilizing unit (3) is connected to the grouting and water blocking unit (2) and the other end is detachably fixed in a clamping hole (12) of the curtain body (1); The grouting water plugging unit (2) comprises a water distribution pipe (21), a sealing plate (22), a water-swelling material (23), a filter cover (24), a water pressure balance pipe (25), and a connecting pipe (26); the sealing plate (22) is an annular structure and is coaxially fixedly sleeved on the water distribution pipe (21); the filter cover (24) is slidably sleeved on one end of the water distribution pipe (21); the water-swelling material (23) is fixedly wound on the water distribution pipe (21) between the filter cover (24) and the sealing plate (22); one side of the water distribution pipe (21) sleeved with the water-swelling material (23) and the filter cover (24) can be slidably extended into the reserved guide hole (11) of the curtain body (1); the end surface of the sealing plate (22) is in contact with the outer side wall of the curtain body (1); the water pressure balance pipe (25) is vertically fixedly sleeved on the water distribution pipe (21); The connecting pipe (26) is fixed on a water distribution pipe (21) away from the filter cover (24) and is in communication with the water distribution pipe (21); the connecting pipe (26) is fixedly arranged at one end of the water pressure balance pipe (25) away from the water distribution pipe (21); a grouting pipe (27) is connected and fixed to the bottom end of the connecting pipe (26); the grouting pipe (27) sequentially passes through the water pressure balance pipe (25) and the water distribution pipe (21) and extends into the filter cover (24); a water shut-off valve (28) is arranged on the side of the water pressure balance pipe (25) away from the filter cover (24); a water distribution port is arranged on the end of the water distribution pipe (21) away from the filter cover (24); a grouting pipe (29) is further arranged on the water distribution pipe (21) between the water shut-off valve (28) and the sealing plate (22); and an observation valve is arranged on the grouting pipe (29).

2. The mine curtain grouting water blocking device according to claim 1 is characterized in that: The two ends of the water-swellable material (23) are respectively in contact with the end surfaces of the filter cover (24) and the sealing plate (22); the bottom end of the connecting pipe (26) is in communication with the water pressure balance pipe (25); and a water pressure cap (2A) is detachably fixed to the top end of the connecting pipe (26) and / or the water outlet of the water distribution pipe (21).

3. The mine curtain grouting water blocking device according to claim 2 is characterized in that: The stabilizing unit (3) comprises a fixing plate (31), a support rod (32), a clamping plate (33), a clamping rod (34), a guide column (35), a guide rod (36), a guide block (37), and a clamping block (38); the fixing plate (31) is fixedly arranged on the outer wall between the sealing plate (22) and the water pressure balance pipe (25) of the water distribution pipe (21); at least two support rods (32) are evenly distributed on the outer circumference of the water distribution pipe (21); one end of the support rod (32) is connected to the fixing plate (31) and the other end is connected to the clamping plate (33); the clamping rod (34) slides through the clamping plate (33) and slidably extends into the clamping hole (12) of the curtain body (1); the guide column (35) is slidably arranged in a sliding hole extending along the axis of the clamping rod (34). The guide rod (36) is fixedly connected to the guide column (35) and the guide block (37) outside the clamping rod (34) at both ends, respectively. The guide column (35) can be pushed and pulled by the guide block (37) to make the guide column (35) move axially in the sliding hole I. The outer wall of the clamping rod (34) away from the guide block (37) is circumferentially evenly provided with at least two guide holes connected to the sliding hole I. The clamping block (38) is slidably arranged in the guide hole of the clamping rod (34) and the bottom end is in contact with the guide column (35). The guide column (35) is provided with a connecting portion that can push the clamping block (38) to move outward and retract inward in the guide hole. The clamping block (38) can be inserted into the side wall of the clamping hole (12) when it moves out of the guide hole. A reset mechanism (4) for pushing the clamping block (38) to retract inward is also provided on one side of the guide hole of the clamping rod (34).

4. The mine curtain grouting water blocking device according to claim 3 is characterized in that: A clamping groove (13) is provided on the side wall of the clamping hole (12), and the clamping block (38) moves out of the guide hole and can slidably extend into the clamping groove (13); the connecting portion on the guide column (35) is a conical head or an annular groove, and the bottom end of the clamping block (38) is an arc-shaped structure.

5. The mine curtain grouting water blocking device according to claim 3 is characterized in that: The reset mechanism (4) comprises a reset groove (41), a slide plate (42), and a reset spring (43); the reset groove (41) is arranged at one side of the guide hole of the clamping rod (34) and is communicated with the guide hole; the slide plate (42) is slidably arranged in the reset groove (41) and one end of the slide plate is fixedly connected to the clamping block (38); the reset spring (43) is movably arranged in the reset groove (41) at one side of the slide plate (42) away from the guide column (35) and two ends of the slide plate (43) are respectively in contact with the side wall of the reset groove (41) and the end surface of the slide plate (42).

6. The mine curtain grouting water blocking device according to claim 3 is characterized in that: An anti-slip mechanism (5) is also provided between the guide block (37) and the clamping plate (33), the anti-slip mechanism (5) comprising a limiting ring (51), a torsion spring (52), a limiting rod (53), a pull rope (54), a pull plate (55), and a pull rod (56), the limiting ring (51) being fixedly arranged in a sliding hole I at an end of the clamping rod (34) away from the clamping block (38), the torsion spring (52) being fixedly arranged on a side of the guide block (37) facing the clamping rod (34), at least two limiting rods (53) being evenly distributed circumferentially between the guide block (37) and the clamping rod (34), the limiting rod (53) and the clamping rod (56) being arranged on a circumferential surface. 3) one end is fixedly connected to the torsion spring (52) and the other end extends to the side of the limit ring (51) away from the guide block (37); the guide rod (36) is provided with an axially extending sliding hole II (57) on the side close to the guide block (37); the pull plate (55) is slidably arranged in the sliding hole II (57); the pull rod (56) is movably arranged in the sliding hole II (57) and one end movably extends to the outside of the guide block (37) and the other end is fixedly connected to the pull plate (55); the pull rope (54) movably passes through the side wall of the guide rod (36) and the two ends are respectively fixedly connected to the pull plate (55) and the limit rod (53).

7. The mine curtain grouting water blocking device according to claim 6 is characterized in that: The sliding hole II (57) is a blind hole or a stepped hole. An anti-loosening spring (58) is movably provided on the side of the pull plate (55) away from the guide block (37) of the sliding hole II (57). The two ends of the anti-loosening spring (58) are respectively in contact with the end surfaces of the pull plate (55) and the sliding hole II (57).

8. A mine curtain grouting water blocking method, characterized in that: The mine curtain grouting water blocking device based on any one of the above 3 to 7 includes the steps of fixing the grouting water blocking device, grouting water blocking construction, pressure grouting, and dismantling the grouting water blocking device, and the specific contents are: A. Fixing the grouting water blocking device: Find the leaking crack (14) inside the curtain body (1), then open a reserved guide hole (11) on the side of the leaking crack (14), and open a clamping hole (12) on the side of the reserved guide hole (11) of the curtain body (1), then insert one side of the water distribution pipe (21) into the reserved guide hole (11), and then insert the side of the stabilizing unit (3) away from the water distribution pipe (21) into the clamping hole (12) and fix it; B. Grouting and water blocking construction: close the water shut-off valve (28) on the water distribution pipe (21), then start the grouting pump, and inject the pre-mixed slurry into the leaking cracks (14) inside the curtain body (1) through the grouting pipe (27), and fill the leaking cracks (14) after the grouting is finally set to block the water; C. Pressure grouting: After the slurry injected through the grouting pipe (27) has finally set, the grouting pipe (27) is cut off at the top of the hydraulic balance pipe (25) and the top of the connecting pipe (26) is sealed with a hydraulic cap (2A). Then, the observation valve on the grouting pipe (29) is opened and pressure grouting is performed. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and the grouting is stopped. E. Removal of the grouting and water blocking device: After the grouting reaches a predetermined strength or a predetermined time, the stabilizing unit (3) is loosened and the clamping hole (12) is pulled out, and then the water distribution pipe (21) is pulled out of the reserved guide hole (11), and the grouting and water blocking device is separated from the curtain body (1) to prepare for repeated grouting and water blocking.

9. The mine curtain grouting water blocking method according to claim 8, characterized in that: In the step A, after one side of the water distribution pipe (21) is inserted into the reserved guide hole (11), the water distribution pipe (21) is then rotated to drive the support rod (32) and the clamping plate (33) to align with the clamping hole (12) opened on the side of the reserved guide hole (11), and then the clamping rod (34) is slidably inserted into the clamping hole (12) on the side away from the support rod (32). When the clamping rod (34) is inserted into the clamping hole (12), the guide block (37) is pushed to drive the guide rod (36) and the guide column (35) to slide into the sliding hole I of the clamping rod (34), and the sliding guide column (35) squeezes the clamping block (38), and the squeezed clamping block (38) moves out of the guide hole and is inserted into the clamping groove (13) inside the clamping hole (12).

10. The mine curtain grouting water blocking method according to claim 8, characterized in that: In step B, before grouting, the water shut-off valve (28) is opened to allow the seepage water in the leaking fissure (14) to flow out from the water outlet of the water outlet pipe (21); during the grouting process, the observation valve on the grouting pipe (29) is opened, and when grouting appears at the opening of the grouting pipe (29) and reaches a predetermined concentration, the grouting is stopped and the observation valve is closed.

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