A curtain grouting water plugging device and grouting water plugging method for mines

Abstract

This invention belongs to the field of underground waterproofing engineering technology, specifically disclosing a grouting and water-blocking device and method for mine curtain grouting. The device's stabilizing unit is fixed at one end to the grouting and water-blocking unit, and the other end is detachably fixed in a snap-fit ​​hole. The sealing plate of the grouting and water-blocking unit is sleeved on the water distribution pipe, a filter screen is slidably sleeved on one end of the water distribution pipe, a water-swellable material is fixed on the water distribution pipe, the water distribution pipe can extend into a pre-reserved guide hole, a water pressure balance pipe is vertically fixed on the water distribution pipe, a connecting pipe is fixed to the top of the water pressure balance pipe and connected to a grouting pipe at its bottom end, the grouting pipe sequentially passes through the water pressure balance pipe and the water distribution pipe and extends into the filter screen, a water shut-off valve is provided on one side of the water distribution pipe and a water outlet is provided on its end face, a grout replenishment pipe is provided on its outer wall, and an observation valve is provided on the grout replenishment pipe. The method includes the steps of device fixing, grouting and water-blocking construction, pressure grouting, and device dismantling. This invention has the characteristics of high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost.

Description

Technical Field

[0001] This invention relates to the field of underground waterproofing engineering technology, specifically to a mine curtain grouting and water-blocking device and method that features high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost. Background Technology

[0002] During mining operations, seepage and water inrush are inevitable problems. These typically arise because the mine's sidewalls contain interconnected water-conducting rock fissures or karst channels. Diagenesis and weathering cause rock fracturing, increasing permeability and allowing groundwater to accumulate or become conduits for groundwater flow. Therefore, curtain grouting devices are commonly used to block water inrush. This involves injecting grout into the rock fissures or karst channels, allowing the grout to permeate, diffuse, solidify, and harden along these channels. This creates a curtain preventing groundwater seepage along the main water inrush path between the water source and the mine or mining area. Essentially, this curtain alters the permeability of the rock strata in certain sections of the mine's water-bearing path by injecting grout through boreholes, effectively intercepting large amounts of groundwater outside the curtain. Curtain grouting significantly reduces the amount of water flowing into the mine, thereby reducing casualties and major accidents caused by mine water inrush. By effectively sealing the water inrush, it creates a favorable environment for safe mining operations.

[0003] Currently, during the grouting and water plugging process on the sidewall rock and soil layers of mines, when the pipe is inserted into the rock and soil layers, the high-pressure flowing groundwater contained in the rock and soil layers will seep out or even gush out through the pipe insertion port. This not only causes part or even all of the injected grout to be lost with the water flow and become difficult to form, seriously affecting the efficiency of grouting and water plugging, but also often fails to completely seal the leaking holes, resulting in poor actual sealing effect.

[0004] To address the aforementioned problems, existing technologies employ various methods. One approach involves installing a water inlet pipe that can be inserted into the leak hole to draw water out of the pipe. A filter screen is wrapped around the bottom outer wall of the inlet pipe to prevent water flow from eroding the leak hole wall and causing the leak to expand. Then, a distribution pipe, a water pressure balance pipe, and a grouting pipe are connected to the outer end of the inlet pipe via a flange. The water pressure in the water pressure balance pipe is balanced with the water pressure in the leak hole, keeping the water in the leak hole still to improve grouting quality and efficiency. The distribution pipe can drain the water flow from the inlet pipe, while the grouting pipe can be used for high-pressure grouting later. Furthermore, diagonal bracing is installed on both sides of the distribution pipe, and the bracing is connected to the curtain wall via anchor grouting or expansion bolts to prevent the water inlet pipe inside the leak hole from being flushed out by water pressure. However, since the outer wall of the aforementioned water pipe is wrapped with a filter screen, and the grout solidifies and bonds firmly with the filter screen, the water pipe is difficult to pull out from the leak hole. Therefore, it can only be removed from the flange connection point, making the water pipe usable only once, which is costly. Moreover, the diagonal tie rods connected to the curtain wall by anchoring grout or expansion bolts require anchoring grout or driving in expansion bolts before each fixing. This is not only cumbersome and inefficient, but also increases the cost of grouting and water plugging because the anchoring grout or expansion bolts can only be used once. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a mine curtain grouting and water plugging 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 plugging method.

[0006] The mine curtain grouting and water-blocking device of the present invention is implemented as follows: it includes a grouting and water-blocking unit and a stabilizing unit. One end of the grouting and water-blocking unit can be inserted into the reserved guide hole of the 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 the snap-fit ​​hole of the curtain body.

[0007] The grouting and water-blocking unit includes a water distribution pipe, a sealing plate, a water-swellable material, a filter screen, a water pressure balancing pipe, and a connecting pipe. The sealing plate is annular and coaxially fixedly sleeved on the water distribution pipe. The filter screen is slidably sleeved on one end of the water distribution pipe. The water-swellable material is fixedly wound around the water distribution pipe between the filter screen and the sealing plate. The side of the water distribution pipe sleeved with the water-swellable material and the filter screen can slide to a pre-reserved guide hole in the curtain body, and the end face of the sealing plate abuts against the outer wall of the curtain body. The water pressure balancing pipe is vertical. The connecting pipe is fixed to the water distribution pipe away from the filter screen and is connected to the water distribution pipe. The connecting pipe is fixed at the end of the water pressure balance pipe away from the water distribution pipe. The bottom end of the connecting pipe is connected to and fixed to the grouting pipe. The grouting pipe passes through the water pressure balance pipe and the water distribution pipe in sequence and extends into the filter screen. 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 screen. The water distribution pipe is provided with a water outlet at the end away from the filter screen. A grout replenishment pipe is also provided between the water shut-off valve and the sealing plate. An observation valve is provided on the grout replenishment pipe.

[0008] Furthermore, both ends of the water-swellable material abut against the end faces of the filter screen and the sealing plate, respectively; the bottom end of the connecting pipe is connected to the water pressure balance pipe; and a water pressure cap is detachably fixed to the top end of the connecting pipe and / or the water outlet of the water distribution pipe.

[0009] Furthermore, the stabilizing unit includes a fixed plate, support rods, a snap-fit ​​plate, a snap-fit ​​rod, a guide post, a guide rod, a guide block, and a snap-fit ​​block. The fixed plate is fixedly installed on the outer wall between the sealing plate of the water distribution pipe and the water pressure balance pipe. At least two support rods are evenly distributed circumferentially on the outer side 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 snap-fit ​​plate. The snap-fit ​​rod slides through the snap-fit ​​plate and extends slidably into the snap-fit ​​hole of the curtain body. The guide post is slidably installed in the sliding hole I extending along the axis of the snap-fit ​​rod. Both ends of the guide rod... The guide blocks are fixedly connected to the guide post and the outer side of the locking rod, respectively. The guide post can be moved axially in the sliding hole I by pushing and pulling the guide blocks. The outer wall of the locking rod away from the guide block has at least two guide holes that are evenly distributed around the sliding hole I. The locking block is slidably disposed in the guide hole of the locking rod and its bottom end abuts against the guide post. The guide post is provided with a connecting part that can push the locking block to move outward and retract inward in the guide hole. The locking block can be inserted into the side wall of the locking hole by moving outward in the guide hole. A reset mechanism that pushes the locking block to retract inward is also provided on one side of the guide hole of the locking rod.

[0010] Furthermore, a slot is provided on the side wall of the snap-fit ​​hole, and the snap block can slide outward from the guide hole and extend into the slot; the connecting part on the guide post is a conical head or an annular groove, and the bottom end of the snap block is an arc-shaped structure.

[0011] Furthermore, the reset mechanism includes a reset groove, a sliding plate, and a reset spring. The reset groove is disposed on one side of the guide hole of the latching rod and communicates with the guide hole. The sliding plate is slidably disposed in the reset groove and one end is fixedly connected to the latching block. The reset spring is movably disposed on the side of the sliding plate away from the guide post in the reset groove and both ends abut against the side wall of the reset groove and the end face of the sliding plate, respectively.

[0012] Furthermore, an anti-detachment mechanism is provided between the guide block and the snap-fit ​​plate. The anti-detachment 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 installed in the sliding hole I at the end of the snap-fit ​​rod away from the snap-fit ​​block. The torsion spring is fixedly installed on the side of the guide block facing the snap-fit ​​rod. At least two limiting rods are evenly distributed circumferentially between the guide block and the snap-fit ​​rod. One end of the limiting rod is fixedly connected to the torsion spring, and the other end extends to the side of the limiting ring away from the guide block. The guide rod is provided with an axially extending sliding hole II on the side near the guide block. The pull plate is slidably installed in the sliding hole II. The pull rod is movably installed in the sliding hole II, with one end movably extending to the outside of the guide block and the other end fixedly connected to the pull plate. The pull rope movably passes through the side wall of the guide rod, and both ends are fixedly connected to the pull plate and the limiting rod, respectively.

[0013] Furthermore, the sliding hole II is a blind hole or a stepped hole, and an anti-loosening spring is movably provided on the side of the pull plate away from the guide block of the sliding hole II, with the two ends of the anti-loosening spring abutting against the end faces of the pull plate and the sliding hole II, respectively.

[0014] The mine curtain grouting water plugging method of the present invention is implemented as follows: based on the aforementioned mine curtain grouting water plugging device, it includes the steps of fixing the grouting water plugging device, grouting water plugging construction, pressure grouting, and dismantling the grouting water plugging device, the specific contents of which are as follows:

[0015] A. Fixing the grouting and water plugging device: Locate the water leakage crack inside the curtain body, then open a reserved guide hole on the side of the water leakage crack, and open a snap-fit ​​hole on the side of the reserved guide hole in 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 snap-fit ​​hole and fix it.

[0016] B. Grouting and water plugging construction: Close the water shut-off valve on the water distribution pipe, then start the grouting pump and inject the pre-mixed grout into the leaking cracks inside the curtain body through the grouting pipe. After the grouting has set, fill the leaking cracks to achieve the water plugging effect.

[0017] C. Pressure grouting: After the grout injected through the grouting pipe has set, cut off the top part of the grouting pipe above the water pressure balance pipe and seal the top of the connecting pipe with a water pressure cap. Then open the observation valve on the grouting pipe and perform pressure grouting. When the grouting volume and grouting pressure reach the design requirements, close the observation valve and stop grouting.

[0018] E. Removal of grouting and water plugging device: After the grouting reaches the predetermined strength or time, loosen the stabilizing unit and pull out the snap-fit ​​hole. Then, pull out the water distribution pipe through the reserved guide hole and separate the grouting and water plugging device from the curtain body for repeated grouting and water plugging.

[0019] Further, in step A, after one side of the water distribution pipe is inserted into the reserved guide hole, the water distribution pipe is rotated to align the support rod and the snap-fit ​​plate with the snap-fit ​​hole opened on the side of the reserved guide hole. Then, the side of the snap-fit ​​rod away from the support rod is slid into the snap-fit ​​hole. When the snap-fit ​​rod is inserted into the snap-fit ​​hole, the guide block is pushed to drive the guide rod and guide post to slide into the sliding hole I of the snap-fit ​​rod. The sliding guide post squeezes the snap-fit ​​block, and the snap-fit ​​block moves out of the guide hole and is inserted into the snap-fit ​​groove inside the snap-fit ​​hole.

[0020] Furthermore, in step B, before grouting, the water shut-off valve is opened to allow the seepage water in the leaking crack 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 grouting is stopped and the observation valve is closed when grout returns to the opening of the grouting pipe and reaches the predetermined concentration.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The grouting and water-blocking device of the present invention inserts a water distribution pipe into a pre-reserved guide hole, so that the sealing plate on the water distribution pipe covers the end face of the pre-reserved guide hole to seal the opening of the pre-reserved guide hole and limit the water distribution pipe. At the same time, the water-swellable material on the water distribution pipe expands rapidly upon contact with water to seal the gap between the water distribution pipe and the pre-reserved guide hole, thereby preventing water flow from eroding the hole wall of the pre-reserved guide hole and causing the leakage point to expand continuously. Moreover, a water pressure balancing pipe, a grouting pipe and a water shut-off valve are connected to the outside of the water distribution pipe. The water pressure balancing pipe can balance the water head pressure with the water pressure in the hole to improve the grouting efficiency, while the water shut-off valve can discharge the water flow in the water distribution pipe, and the grouting pipe can be used for high-pressure grouting in the later stage. Furthermore, a stabilizing unit is provided, with one end connected to the grouting and water-blocking unit and the other end detachable and fixed in the snap-fit ​​hole of the curtain body. This not only prevents the water distribution pipe in the pre-reserved guide hole from being washed out by water pressure, but also prevents the entire device from shaking during the grouting process, which would affect the grouting quality.

[0023] 2. The grouting and water-blocking device of the present invention allows the filter screen to be slidably sleeved on one end of the water distribution pipe. During disassembly, the filter screen, which is integrated with the solidified grout, can be slid off and left in the reserved guide hole. Furthermore, since the water-swellable material is fixedly wrapped around the water distribution pipe between the filter screen and the sealing plate, the water-swellable material will not obstruct the water distribution pipe from being pulled out axially during disassembly. This solves the problem of the water distribution pipe being difficult to pull out from the reserved guide hole later. This not only allows the water distribution pipe inserted into the reserved guide hole to be reused, reducing the cost of grouting and water-blocking, but also makes the extraction design more efficient than disassembling the flange connection.

[0024] 3. The stabilizing unit of the grouting and water-blocking device of the present invention controls the axial movement of the guide column within the sliding hole I of the snap-fit ​​rod by pushing and pulling the guide block. This allows the snap-fit ​​block to move within the guide hole of the snap-fit ​​rod, thereby controlling the snap-fit ​​block to insert into the side wall of the snap-fit ​​hole or retract from the side wall of the snap-fit ​​hole back into the guide hole of the snap-fit ​​rod. This achieves the snap-fit ​​fixing or disconnection of the snap-fit ​​rod and the snap-fit ​​hole, and subsequently the connection or disassembly of the stabilizing unit and the curtain body. Since the connection only requires opening a snap-fit ​​hole on the curtain body, compared with existing rebar grouting or expansion bolt connections, it is not only simpler in process and has higher snap-fit ​​assembly and disassembly efficiency, but the entire stabilizing unit can also be reused, reducing the cost of grouting and water-blocking. In particular, the reset mechanism set on the snap-fit ​​block side can improve the reliability of the snap-fit ​​block retracting back into the guide hole of the snap-fit ​​rod during disassembly; and the anti-detachment mechanism set on the outside of the snap-fit ​​rod can prevent the snap-fit ​​block from accidentally retracting due to guide column slippage caused by vibration during grouting, thus improving the reliability of the connection between the device and the curtain body.

[0025] In summary, the present invention has the characteristics of high grouting efficiency, stable and reliable grouting, convenient assembly and disassembly, and low cost. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the mine curtain grouting and water plugging device of the present invention in use.

[0027] Figure 2 This is a half-sectional schematic diagram of the mine curtain grouting and water plugging device of the present invention in use.

[0028] Figure 3 This is a schematic diagram of the mine curtain grouting and water-blocking device of the present invention;

[0029] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0030] Figure 5 For the present invention Figure 4 Enlarged view at point B in the middle;

[0031] Figure 6 For the present invention Figure 4 Enlarged view at point C;

[0032] Figure 7 This is a schematic diagram of the limiting rod structure of the present invention;

[0033] Figure 8 This is a flowchart of the mine curtain grouting water plugging method of the present invention;

[0034] In the diagram: 1-Curtain body, 11-Pre-drilled guide hole, 12-Snap-fit ​​hole, 13-Card slot, 14-Leaking crack, 2-Grouting and water-blocking unit, 21-Water distribution pipe, 22-Sealing plate, 23-Water-swellable material, 24-Filter screen cover, 25-Water pressure balance pipe, 26-Connecting pipe, 27-Grouting pipe, 28-Water shut-off valve, 29-Grouting repair pipe, 2A-Water pressure cap, 3-Stabilizing unit, 31-Fixing 32-Support rod, 33-Snap-on plate, 34-Snap-on rod, 35-Guide post, 36-Guide rod, 37-Guide block, 38-Snap-on block, 4-Reset mechanism, 41-Reset groove, 42-Slide plate, 43-Reset spring, 5-Anti-detachment mechanism, 51-Limit ring, 52-Torsion spring, 53-Limit rod, 54-Pull rope, 55-Pull plate, 56-Pull rod, 57-Slide hole II, 58-Anti-loosening spring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0036] like Figures 1 to 7 As shown, the mine curtain grouting and water blocking device of the present invention includes 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 snap-fit ​​hole 12 of the curtain body 1.

[0037] The grouting and water-blocking unit 2 includes a water distribution pipe 21, a sealing plate 22, a water-swellable material 23, a filter screen 24, a water pressure balancing 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 screen 24 is slidably sleeved on one end of the water distribution pipe 21. The water-swellable material 23 is fixedly wound around the water distribution pipe 21 between the filter screen 24 and the sealing plate 22. The side of the water distribution pipe 21 sleeved with the water-swellable material 23 and the filter screen 24 can slide to extend into the reserved guide hole 11 of the curtain body 1, and the end face of the sealing plate 22 abuts against the outer wall of the curtain body 1. The water pressure balancing pipe 25 is vertically fixed. A water distribution pipe 21 is fixed on and connected to the water distribution pipe 21 away from the filter screen 24. The connecting pipe 26 is fixedly installed at the end of the water pressure balance pipe 25 away from the water distribution pipe 21. The bottom end of the connecting pipe 26 is connected to and fixedly connected to the 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 screen 24. A water shut-off valve 28 is provided on the side of the water pressure balance pipe 25 away from the filter screen 24. A water outlet is provided at the end of the water distribution pipe 21 away from the filter screen 24. A grout replenishment pipe 29 is also provided between the water shut-off valve 28 and the sealing plate 22. An observation valve is provided on the grout replenishment pipe 29.

[0038] During operation, a pre-reserved guide hole 11 is opened on the side of the water leakage crack 14 of the curtain body 1. Then, the water distribution pipe 21 is inserted into the pre-reserved guide hole 11, and at the same time, the filter screen 24 and the water-swellable material 23 are inserted into the pre-reserved guide hole 11. The water-swellable material 23 expands rapidly when it comes into contact with water to achieve a sealing effect, and the sealing plate 22 covers the end face of the pre-reserved guide hole 11 for sealing and limiting. Then, the grouting pump is started to inject the pre-prepared grout into the grouting pipe 27. The grout is circulated into the interior of the water leakage crack 14 through the filter screen 24 to fill it and achieve a water blocking effect. When the grouting is completed, the water shut-off valve 28 and the observation valve are closed to stop the construction.

[0039] The two ends of the water-swellable material 23 abut against the end faces of the filter screen 24 and the sealing plate 22, respectively. The bottom end of the connecting pipe 26 is connected to the water pressure balance pipe 25. 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.

[0040] The stabilizing unit 3 includes a fixed plate 31, a support rod 32, a snap-fit ​​plate 33, a snap-fit ​​rod 34, a guide post 35, a guide rod 36, a guide block 37, and a snap-fit ​​block 38. The fixed plate 31 is fixedly installed 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 circumferentially on the outer side of the water distribution pipe 21. One end of the support rod 32 is connected to the fixed plate 31, and the other end is connected to the snap-fit ​​plate 33. The snap-fit ​​rod 34 slides through the snap-fit ​​plate 33 and extends slidably into the snap-fit ​​hole 12 of the curtain body 1. The guide post 35 is slidably installed in the sliding hole I extending along the axis of the snap-fit ​​rod 34. The two ends of the rod 36 are fixedly connected to the guide post 35 and the guide block 37 on the outside of the locking rod 34, respectively. The guide post 35 can be moved axially in the sliding hole I by pushing and pulling the guide block 37. The outer wall of the locking rod 34 away from the guide block 37 has at least two guide holes that communicate with the sliding hole I. The locking block 38 is slidably disposed in the guide hole of the locking rod 34 and its bottom end abuts against the guide post 35. The guide post 35 is provided with a connecting part that can push the locking block 38 to move outward and retract inward in the guide hole. The locking block 38 can be inserted into the side wall of the locking hole 12 by moving outward in the guide hole. The locking rod 34 is also provided with a reset mechanism 4 on one side of the guide hole to push the locking block 38 to retract inward.

[0041] During operation, when the grouting pipe 27 shakes during grouting, a fixing plate 31 is installed on the water distribution pipe 21, which drives the support rod 32 and the snap-fit ​​plate 33 to align with the snap-fit ​​hole 12 opened at the end of the curtain body 1. Then, the snap-fit ​​rod 34 is inserted into the snap-fit ​​hole 12. Subsequently, by pushing the guide block 37, the guide rod 36 and the guide post 35 are inserted into the sliding hole I of the snap-fit ​​rod 34, so that the surface of the guide post 35 presses the snap-fit ​​block 38 to move into the snap-fit ​​groove 13, thereby quickly fixing the water distribution pipe 21 to the curtain body 1 and reducing the shaking of the water distribution pipe 21 and the grouting pipe 27 during grouting.

[0042] The two ends of the support rod 32 are respectively hinged or fixedly connected to the fixing plate 31 and the snap-fit ​​plate 33. The hinged structure facilitates the connection of the support rod 32 to the uneven or tilted curtain body 1, improving the flexibility of use; while the fixed connection structure, after the water pipe 21 is inserted into the reserved guide hole 11, can prevent the snap-fit ​​rod 34 from being difficult to align due to the shaking of the support rod 32, thus facilitating the alignment of the snap-fit ​​rod 34 on the snap-fit ​​plate 33 with the snap-fit ​​hole 12 on the regular curtain body 1 to improve installation efficiency.

[0043] The side wall of the snap-fit ​​hole 12 is provided with a snap-fit ​​groove 13, and the snap-fit ​​block 38 can slide out of the guide hole and extend into the snap-fit ​​groove 13; the connecting part on the guide post 35 is a conical head or an annular groove, and the bottom end of the snap-fit ​​block 38 is an arc-shaped structure.

[0044] The reset mechanism 4 includes a reset groove 41, a sliding plate 42, and a reset spring 43. The reset groove 41 is located on one side of the guide hole of the locking rod 34 and communicates with the guide hole. The sliding plate 42 is slidably disposed in the reset groove 41 and one end is fixedly connected to the locking block 38. The reset spring 43 is movably disposed in the reset groove 41 on the side of the sliding plate 42 away from the guide post 35, and both ends abut against the side wall of the reset groove 41 and the end face of the sliding plate 42, respectively.

[0045] During operation, when the locking block 38 is squeezed and slides into the locking groove 13, it drives the sliding plate 42 to slide in the reset groove 41 to squeeze the reset spring 43. When it is necessary to disassemble the stabilizing unit 3, the guide block 37 is pulled to drive the guide rod 36 and the guide post 35 to slide out from the sliding hole I of the locking rod 34. At this time, the elastic force of the reset spring 43 pushes the sliding plate 42 to drive the locking block 38 to move along the reset groove 41, so that the locking block 38 retracts into the guide hole of the locking rod 34, realizing the separation of the locking block 38 from the locking groove 13 so that the stabilizing unit 3 can be separated from the curtain body 1.

[0046] An anti-detachment mechanism 5 is also provided between the guide block 37 and the latching plate 33. The anti-detachment 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 installed in the sliding hole I at the end of the latching rod 34 away from the latching block 38. The torsion spring 52 is fixedly installed on the side of the guide block 37 facing the latching rod 34. At least two limiting rods 53 are evenly distributed circumferentially between the guide block 37 and the latching rod 34. One end of the limiting rod 53... The guide rod 36 is fixedly connected to the torsion spring 52 and extends to the side of the limiting 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 near the guide block 37. The pull plate 55 is slidably disposed in the sliding hole II 57. The pull rod 56 is movably disposed in the sliding hole II 57, with one end movably extending to the outside of the guide block 37 and the other end fixedly connected to the pull plate 55. The pull rope 54 movably passes through the side wall of the guide rod 36 and its two ends are fixedly connected to the pull plate 55 and the limiting rod 53, respectively.

[0047] During operation, when the guide block 37 drives the guide rod 36 to insert into the sliding hole I of the locking rod 34, the pull rod 56 is pulled to drive the pull plate 55 to slide on the outer end face of the guide block 37. Then, the pull plate 55 pulls the limiting rod 53 through the pull rope 54. The torsion spring 52 generates elastic force, causing the limiting rod 53 to retract inward, so that the connecting end of the limiting rod 53 is disengaged from the limiting ring 51. By pushing the pull rod 56, the connecting end of the limiting rod 53 can be moved outward and locked into the limiting ring 51 due to the relaxation of the pull rope 54 and the disappearance of the force acting on the torsion spring 52. This achieves the limiting and locking of the end of the limiting ring 51, and avoids the slippage of the guide block 37 and the guide post 35.

[0048] The sliding hole II 57 is a blind hole or a stepped hole. An anti-loosening spring 58 is movably installed on the side of the pull plate 55 away from the guide block 37. The two ends of the anti-loosening spring 58 abut against the end faces of the pull plate 55 and the sliding hole II 57, respectively. The anti-loosening spring 58 serves to limit and reposition itself.

[0049] like Figures 1 to 8 As shown, the mine curtain grouting water plugging method of the present invention, based on the aforementioned mine curtain grouting water plugging device, includes the steps of fixing the grouting water plugging device, grouting water plugging construction, pressure grouting, and dismantling the grouting water plugging device. The specific content is as follows:

[0050] A. Fixing the grouting and water plugging device: Locate the water leakage crack 14 inside the curtain body 1, then open a reserved guide hole 11 on the side of the water leakage crack 14, and open a snap-fit ​​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 snap-fit ​​hole 12 and fix it.

[0051] B. Grouting and water plugging construction: Close the water shut-off valve 28 on the water distribution pipe 21, then start the grouting pump and inject the pre-mixed grout into the water leakage crack 14 inside the curtain body 1 through the grouting pipe 27. After the grouting has set, fill the water leakage crack 14 to achieve the water plugging effect.

[0052] C. Pressure grouting: After the grout injected through the grouting pipe 27 has set, the grouting pipe 27 is cut off at the top of the water pressure balance pipe 25 and the top of the connecting pipe 26 is sealed with water pressure cap 2A. Then, the observation valve on the grouting pipe 29 is opened and pressure grouting is carried out. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and grouting is stopped.

[0053] E. Removal of grouting and water plugging device: After the grouting reaches the predetermined strength or time, loosen the stabilizing unit 3 and pull out the snap-fit ​​hole 12. Then, pull out the water distribution pipe 21 through the reserved guide hole 11 and separate the grouting and water plugging device from the curtain body 1 for repeated grouting and water plugging.

[0054] 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 rotated to align the support rod 32 and the snap-fit ​​plate 33 with the snap-fit ​​hole 12 opened on the side of the reserved guide hole 11. Then, the snap-fit ​​rod 34 is slidably inserted into the snap-fit ​​hole 12 on the side away from the support rod 32. When the snap-fit ​​rod 34 is inserted into the snap-fit ​​hole 12, the guide block 37 is pushed to drive the guide rod 36 and the guide post 35 to slide into the sliding hole I of the snap-fit ​​rod 34. The sliding guide post 35 squeezes the snap-fit ​​block 38. The snap-fit ​​block 38 moves out of the guide hole and is inserted into the snap-fit ​​groove 13 inside the snap-fit ​​hole 12.

[0055] In step B, before grouting, the shut-off valve 28 is opened to allow seepage water from the leaking fissure 14 to flow out from the branch outlet of the branch pipe 21. During grouting, the observation valve on the grouting pipe 29 is opened. Grouting is stopped and the observation valve is closed when grout returns to the opening of the grouting pipe 29 and reaches the predetermined concentration. Opening the shut-off valve 28 to drain water before grouting reduces the water pressure in the hole, which is beneficial for the installation of the device. Closing the shut-off valve 28 during grouting prevents the grout from being lost with the water flow and making it difficult to form. At the same time, the water pressure balance pipe 25 balances the water head pressure in it with the water pressure in the reserved guide hole 11, so that the water in the branch pipe 21 stops flowing, which is beneficial for grouting.

[0056] Example 1

[0057] like Figures 1 to 8 As shown, the specific process of curtain grouting for water plugging in mines is as follows:

[0058] S100: Locate the leaking crack 14 inside the curtain body 1, then open a pre-reserved guide hole 11 on the side of the leaking crack 14, and open a snap-fit ​​hole 12 on the side of the pre-reserved guide hole 11 of the curtain body 1. Then insert one side of the water distribution pipe 21 into the pre-reserved guide hole 11. Then rotate the water distribution pipe 21 to drive the support rod 32 and the snap-fit ​​plate 33 to align with the snap-fit ​​hole 12 opened on the side of the pre-reserved guide hole 11. Then slide the snap-fit ​​rod 34 away from the support rod 32 into the snap-fit ​​hole 12. When the snap-fit ​​rod 34 is inserted into the snap-fit ​​hole 12, push the guide block 37 to drive the guide rod 36 and the guide post 35 to slide into the sliding hole I of the snap-fit ​​rod 34. The sliding guide post 35 squeezes the snap-fit ​​block 38. The snap-fit ​​block 38 moves out of the guide hole and is inserted into the snap-fit ​​groove 13 inside the snap-fit ​​hole 12.

[0059] S200: Before grouting, open the water shut-off valve 28 to allow the seepage water in the leakage fissure 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 and inject the pre-mixed grout into the leakage fissure 14 inside the curtain body 1 through the grouting pipe 27. When the grouting pipe 29 opens and the grout returns to the predetermined concentration, stop the grouting and close the observation valve. After the grouting has set, fill the leakage fissure 14 to achieve the water-blocking effect.

[0060] S300: After the grout injected through the grouting pipe 27 has set, the grouting pipe 27 is cut off at the top of the water pressure balance pipe 25 and the top of the connecting pipe 26 is sealed with a water pressure 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 grouting is stopped.

[0061] S400: After the grouting reaches the predetermined strength or time, loosen the stabilizing unit 3 and pull out the snap-fit ​​hole 12. Then, pull out the water distribution pipe 21 through the reserved guide hole 11 and separate the grouting and water-blocking device from the curtain body 1 for repeated grouting and water-blocking.

[0062] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A mine curtain grouting and water-blocking device, characterized in that: It includes 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 snap-fit ​​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-swellable material (23), a filter screen (24), a water pressure balance pipe (25), and a connecting pipe (26). The sealing plate (22) is a ring structure and is coaxially fixedly sleeved on the water distribution pipe (21). The filter screen (24) is slidably sleeved on one end of the water distribution pipe (21). The water-swellable material (23) is fixedly wrapped around the water distribution pipe (21) between the filter screen (24) and the sealing plate (22). The side of the water distribution pipe (21) sleeved with the water-swellable material (23) and the filter screen (24) can slide to the reserved guide hole (11) of the curtain body (1), and the end face of the sealing plate (22) abuts against the outer 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 screen (24) and connected to the water distribution pipe (21). The connecting pipe (26) is fixedly installed at the end of the water pressure balance pipe (25) away from the water distribution pipe (21). The bottom end of the connecting pipe (26) is connected to and fixedly connected to the 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 screen (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 screen (24). The water distribution pipe (21) is provided with a water outlet at the end away from the filter screen (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. The two ends of the water-swellable material (23) are respectively in contact with the end faces of the filter screen (24) and the sealing plate (22). The bottom end of the connecting pipe (26) is connected to the water pressure balance pipe (25). The top end of the connecting pipe (26) and / or the water outlet of the water distribution pipe (21) are detachably fixed with a water pressure cap (2A). The stabilizing unit (3) includes a fixing plate (31), a support rod (32), a snap-fit ​​plate (33), a snap-fit ​​rod (34), a guide post (35), a guide rod (36), a guide block (37), and a snap-fit ​​block (38). The fixing plate (31) is fixedly installed on the outer wall between the sealing plate (22) of the water distribution pipe (21) and the water pressure balance pipe (25). At least two support rods (32) are evenly distributed around the outer side 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 snap-fit ​​plate (33). The snap-fit ​​rod (34) slides through the snap-fit ​​plate (33) and extends slidably into the snap-fit ​​hole (12) of the curtain body (1). The guide post (35) is slidably installed in the sliding hole extending along the axis of the snap-fit ​​rod (34). Inside I, the two ends of the guide rod (36) are fixedly connected to the guide post (35) and the guide block (37) on the outside of the snap-fit ​​rod (34), respectively. The guide post (35) can be moved axially in the sliding hole I by pushing and pulling the guide block (37). The snap-fit ​​rod (34) has at least two guide holes that communicate with the sliding hole I evenly distributed on the outer wall away from the guide block (37). The snap-fit ​​block (38) is slidably disposed in the guide hole of the snap-fit ​​rod (34) and its bottom end abuts against the guide post (35). The guide post (35) is provided with a connecting part that can push the snap-fit ​​block (38) to move outward and retract inward in the guide hole. The snap-fit ​​block (38) can be inserted into the side wall of the snap-fit ​​hole (12) when it moves outward from the guide hole. The snap-fit ​​rod (34) is also provided with a reset mechanism (4) that pushes the snap-fit ​​block (38) to retract inward on one side of the guide hole.

2. The mine curtain grouting and water-blocking device according to claim 1, characterized in that: The side wall of the snap-fit ​​hole (12) is provided with a snap-fit ​​groove (13), and the snap-fit ​​block (38) can slide out of the guide hole and extend into the snap-fit ​​groove (13); the connecting part on the guide post (35) is a conical head or an annular groove, and the bottom end of the snap-fit ​​block (38) is an arc-shaped structure.

3. The mine curtain grouting and water-blocking device according to claim 1, characterized in that: The reset mechanism (4) includes a reset groove (41), a sliding plate (42), and a reset spring (43). The reset groove (41) is located on one side of the guide hole of the snap-fit ​​rod (34) and communicates with the guide hole. The sliding plate (42) is slidably located in the reset groove (41) and one end is fixedly connected to the snap-fit ​​block (38). The reset spring (43) is movably located on the side of the sliding plate (42) away from the guide post (35) in the reset groove (41) and both ends abut against the side wall of the reset groove (41) and the end face of the sliding plate (42) respectively.

4. The mine curtain grouting and water-blocking device according to claim 1, characterized in that: An anti-detachment mechanism (5) is also provided between the guide block (37) and the snap-fit ​​plate (33). The anti-detachment 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 installed in the sliding hole I at the end of the snap-fit ​​rod (34) away from the snap-fit ​​block (38). The torsion spring (52) is fixedly installed on the side of the guide block (37) facing the snap-fit ​​rod (34). At least two limiting rods (53) are evenly distributed circumferentially between the guide block (37) and the snap-fit ​​rod (34). 3) One end is fixedly connected to the torsion spring (52) and the other end extends to the side of the limiting 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 near the guide block (37). The pull plate (55) is slidably disposed in the sliding hole II (57). The pull rod (56) is movably disposed in the sliding hole II (57) and one end extends movably 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 both ends are fixedly connected to the pull plate (55) and the limiting rod (53) respectively.

5. The mine curtain grouting and water-blocking device according to claim 4, characterized in that: The sliding hole II (57) is a blind hole or a stepped hole. The sliding hole II (57) is movably 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) abut against the end faces of the pull plate (55) and the sliding hole II (57), respectively.

6. A method for curtain grouting and water plugging in mines, characterized in that: The mine curtain grouting and water-blocking device according to any one of claims 1 to 5 includes the steps of fixing the grouting and water-blocking device, grouting and water-blocking construction, pressure grouting, and dismantling the grouting and water-blocking device. The specific content is as follows: A. Fixing the grouting and water plugging device: Locate the water leakage crack (14) inside the curtain body (1), then open a reserved guide hole (11) on the side of the water leakage crack (14), and open a snap-fit ​​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 snap-fit ​​hole (12) and fix it. B. Grouting and water plugging construction: Close the water shut-off valve (28) on the water distribution pipe (21), then start the grouting pump and inject the pre-mixed grout into the water leakage crack (14) inside the curtain body (1) through the grouting pipe (27). After the grouting has set, fill the water leakage crack (14) to achieve the water plugging effect. C. Pressure grouting: After the grout injected through the grouting pipe (27) has set, the grouting pipe (27) is cut off at the top of the water pressure balance pipe (25) and the top of the connecting pipe (26) is sealed with a water pressure cap (2A). Then, the observation valve on the grouting pipe (29) is opened and pressure grouting is carried out. When the grouting volume and grouting pressure reach the design requirements, the observation valve is closed and grouting is stopped. E. Dismantling of grouting and water plugging device: After the grouting reaches the predetermined strength or time, loosen the stabilizing unit (3) and pull out the snap-fit ​​hole (12), then pull out the water distribution pipe (21) through the reserved guide hole (11) and separate the grouting and water plugging device from the curtain body (1) for repeated grouting and water plugging.

7. The method for curtain grouting and water plugging in mines according to claim 6, characterized in that: In step A, after the water distribution pipe (21) is inserted into the reserved guide hole (11) on one side, the water distribution pipe (21) is rotated to drive the support rod (32) and the snap-fit ​​plate (33) to align with the snap-fit ​​hole (12) opened on the side of the reserved guide hole (11). Then, the snap-fit ​​rod (34) is slid into the snap-fit ​​hole (12) on the side away from the support rod (32). When the snap-fit ​​rod (34) is inserted into the snap-fit ​​hole (12), the guide block (37) is pushed to drive the guide rod (36) and the guide post (35) to slide into the sliding hole I of the snap-fit ​​rod (34). The sliding guide post (35) squeezes the snap-fit ​​block (38). The snap-fit ​​block (38) moves out of the guide hole and is inserted into the snap-fit ​​groove (13) inside the snap-fit ​​hole (12).

8. The method for curtain grouting and water plugging in mines according to claim 6, characterized in that: In step B, before grouting, the shut-off valve (28) is opened so that the seepage water in the leakage crack (14) flows 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 grouting is stopped and the observation valve is closed when the opening of the grouting pipe (29) shows backflow and reaches the predetermined concentration.

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