A sealing device for preventing water seepage in coal mines

Abstract

This invention relates to the field of mining water hazard prevention technology, and discloses a sealing device for preventing water seepage in coal mines. The device includes a grouting pipe, with semi-circular ring blocks symmetrically fitted around the grouting pipe. A common clamping plate is fitted around both semi-circular ring blocks. The two semi-circular ring blocks have mating threads on their outer sidewalls and the inner sidewall of the clamping plate. Movable grooves for the clamping plate are also provided on the outer sidewalls of the two semi-circular ring blocks. A sliding pusher is provided on the outer sidewall of each semi-circular ring block. This invention achieves initial sealing by the cooperation of the grouting pipe, semi-circular ring blocks, clamping plate, pusher, and elastic sealing plug. The two semi-circular ring blocks are fitted around the outer sidewall of the grouting pipe at appropriate positions. The clamping plate is threaded to the threads on the outer walls of the two semi-circular ring blocks. A certain pressure is applied to insert the grouting pipe into the cavity, and hydraulic oil is injected into the two first oil passages.

Description

Technical Field

[0001] This invention relates to the field of mining water hazard prevention technology, and in particular to a sealing device for preventing water seepage in coal mines. Background Technology

[0002] During the construction and production of coal mines, surface water and groundwater flow into the mine through various channels. When the water inflow exceeds the normal drainage capacity, it causes a mine flood. Mine floods (commonly known as water inrush) are one of the most common and serious hazards in coal mines. Once a water inrush occurs, it not only affects normal mine production but can also cause casualties, flood the mine and mining areas, posing a very serious threat. Therefore, effective mine waterproofing is a crucial aspect of ensuring safe mine production.

[0003] Existing methods for sealing leaks in coal mine permeable holes often involve grouting. However, due to geological changes, secondary leaks frequently occur between the grouting holes and the grouting pipes after grouting. Furthermore, the vibration generated during the grouting process causes vibration in the grouting pipes, affecting the bonding of the grout material to the hole walls. Secondary leaks are often sealed by applying anti-seepage powder to the hole edges, but this powder tends to leak tertiarily after a certain period of use, requiring repeated application of the anti-seepage powder for sealing.

[0004] Therefore, it is necessary to invent a sealing device for preventing water seepage in coal mines to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a sealing device for preventing water leakage in coal mines, so as to solve the problems that water leakage holes are prone to secondary leakage, and that the vibration generated by grouting causes the grouting pipe to vibrate, thus affecting the tight bonding of the grouting material to the hole wall.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing device for preventing water seepage in coal mines, comprising a grouting pipe, with semi-circular ring blocks symmetrically fitted around the grouting pipe, and a common clamping plate fitted around the two semi-circular ring blocks. The two semi-circular ring blocks have mating threads on their outer sidewalls and the inner sidewall of the clamping plate. The two semi-circular ring blocks have movable grooves on their outer sidewalls for the clamping plate to move. Each semi-circular ring block has a sliding pusher frame on its outer sidewall, and each pusher frame has an elastic sealing plug for sealing the gap between the grouting pipe and the hole wall. The pusher frame contains a clamping assembly for sealing both sides of the elastic sealing plug. Each semi-circular ring block has a first oil passage and... The second oil passage has a grouting pipe end reinforcement assembly located at one end of the first oil passage within the hole, which is connected to a semi-circular ring block and moved towards the hole wall by hydraulic oil. The second oil passage has a push assembly located at one end of the second oil passage within the hole, which is a push assembly that is pushed by hydraulic oil to press and seal the two sides of the elastic sealing block. The push assembly includes a push column that is slidably connected to the second oil passage via a return spring. A wedge block is provided at one end of the push column. The pressing assembly includes two arc-shaped rings that are symmetrically arranged inside the push frame and slidably connected to the push frame. The arc-shaped rings are connected to the push frame via a contraction spring. The two arc-shaped rings have beveled openings at their close ends, and the bevels between the two arc-shaped rings together form a wedge groove that wedges with the wedge block.

[0007] As a preferred technical solution of the present invention, one of the semicircular ring blocks has two first hinged lugs symmetrically arranged at one end outside the hole, and each of the semicircular ring blocks has a cylinder that mates with the first hinged lug at one end outside the hole. The first hinged lug and the cylinder are hinged together by a pin. The other semicircular ring block has two fixed lugs symmetrically arranged at one end outside the hole. A screw is provided on the circumferential sidewall of the cylinder, and a nut is threaded onto the screw. The fixed lug has a slot that mates with the screw.

[0008] As a preferred technical solution of the present invention, the push frame includes two arc-shaped plates that are symmetrically distributed vertically and connected by a connecting plate. Both ends of the opposite side of the two arc-shaped plates are provided with arc-shaped grooves that cooperate with the arc-shaped ring for limiting. A contraction spring connected to the arc-shaped ring is provided in the arc-shaped groove. A pressure plate for pressing the elastic seal is provided on the top of the top arc-shaped plate.

[0009] As a preferred technical solution of the present invention, the elastic sealing plug comprises, from front to back, a guide section, a sealing section, and an extension section integrally injection molded. The guide section and the extension section are both semi-circular rings, and the sealing section is a hollow semi-circular frustum. The inner sidewalls of the sealing section and the extension section are provided with receiving grooves for placing the pusher frame. The two hollow semi-circular frustums are provided with side sealing layers on opposite sides. The outer diameter of the semi-circular ring of the guide section is smaller than the outer diameter of the semi-circular ring of the extension section. The semi-circular ring of the extension section is provided with a pressure groove that cooperates with the pressure plate on the side away from the hole.

[0010] As a preferred technical solution of the present invention, the grouting pipe end reinforcement assembly includes a telescopic column connected to the inner wall of the first oil passage by a spring, and the telescopic column penetrates the side wall of the semi-circular block.

[0011] As a preferred technical solution of the present invention, the end of the grouting pipe located in the hole is the grouting section, the grouting section has a plurality of grouting holes arranged in a circumferential array, and the grouting section is spirally wound with an elastic rubber layer.

[0012] As a preferred technical solution of the present invention, it further includes a seepage prevention and sealing assembly, which includes a seepage prevention and sealing corrugated expansion tube. One end of the seepage prevention and sealing corrugated expansion tube is provided with a sealing pressure ring, which is fixedly connected to a pressure plate by bolts. The other end of the seepage prevention and sealing corrugated expansion tube is connected to a pressure cylinder, and the other end of the pressure cylinder is rotatably connected to a rotating plate. The rotating plate is provided with a screw hole that mates with the thread on the semi-circular ring block. The outer wall of the seepage prevention and sealing corrugated expansion tube is provided with a powder filling valve and a filter exhaust valve.

[0013] As a preferred technical solution of the present invention, a first hydraulic oil filling valve is provided at one end outside the first oil passage hole, and a second hydraulic oil filling valve is provided at one end outside the second oil passage hole.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This invention utilizes the cooperation between the grouting pipe, semi-circular ring block, clamping plate, pushing frame, elastic sealing plug, clamping assembly, grouting pipe end reinforcement assembly, and jacking assembly. By placing the two semi-circular ring blocks on the outer wall of the grouting pipe at appropriate positions, threading the clamping plate to the threads of the outer walls of the two semi-circular ring blocks, applying a certain pressure to insert the grouting pipe into the cavity, and then injecting hydraulic oil into the two first oil passages, the initial sealing can be completed.

[0015] 2. This invention utilizes the cooperation between the grouting pipe, semi-circular ring block, clamping plate, pushing frame, elastic sealing plug, clamping assembly, grouting pipe end reinforcement assembly, and jacking assembly. By injecting hydraulic oil into the first oil passage, the pushing telescopic column is pressed against the hole wall, thereby achieving internal support and fixing. This fixes the semi-circular ring block, which in turn fixes the grouting pipe that is internally clamped, thus reinforcing the end of the grouting pipe. This prevents the elastic sealing plug from moving and causing pore leakage when grouting liquid is injected, thereby improving the grouting sealing effect.

[0016] 3. This invention utilizes the cooperation between the grouting pipe, semi-circular ring block, clamping plate, pushing frame, elastic sealing plug, clamping assembly, grouting pipe end reinforcement assembly, and jacking assembly. By injecting hydraulic oil into the second oil passage, the hydraulic oil pushes the pushing column to move, which in turn pushes the wedge block to move. The wedge block then pushes the two arc-shaped rings to move in opposite directions. This movement of the two arc-shaped rings in opposite directions causes the arc-shaped rings within the two semi-circular ring blocks to squeeze the side sealing layer, thereby improving the sealing performance between the side sealing layers and preventing leakage from the gaps between them. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention inserted into the hole; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an exploded view of the part of the present invention; Figure 4 This is a schematic diagram of the anti-leakage sealing component structure of the present invention; Figure 5 This is a schematic diagram showing the connection between the clamping plate and the elastic sealing plug structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of section A in the middle; Figure 7 This is a schematic diagram showing the connection between the semi-circular ring block, the push frame, and the elastic sealing block structure of the present invention; Figure 8 This is a schematic diagram showing the connection between the push frame and the elastic sealing block structure of the present invention; Figure 9 This is a schematic diagram showing the connection between the pusher frame and the clamping assembly structure of the present invention; Figure 10 For the present invention Figure 9 Another structural diagram; Figure 11 This is a schematic diagram showing the structural connection between the pushing component and the clamping component of the present invention.

[0018] In the diagram: 1. Grouting pipe; 101. Grouting section; 102. Elastic rubber layer; 2. Semicircular ring block; 201. First hinged support; 202. Cylinder; 203. Fixing ear; 204. Screw; 205. Slot; 3. Pressing plate; 4. Pushing frame; 401. Arc plate; 402. Arc groove; 403. Pressure plate; 5. Elastic sealing plug; 501. Guide section; 502. Sealing section; 5021. Hollow semicircular frustum; 5022. 5023, receiving groove; 503, side sealing layer; 504, extension section; 6, clamping assembly; 605, arc ring; 606, oblique opening; 7, first oil passage; 8, second oil passage; 9, grouting pipe end reinforcement assembly; 906, telescopic column; 10, jacking assembly; 1006, pushing column; 1007, wedge block; 11, anti-leakage sealing assembly; 1107, anti-leakage sealing corrugated telescopic pipe; 1108, sealing pressure ring; 1109, pressure cylinder. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides, for example Figures 1 to 11The invention illustrates a sealing device for preventing water seepage in coal mines, comprising a grouting pipe 1, with semi-circular ring blocks 2 symmetrically fitted around the grouting pipe 1. The invention uses the semi-circular ring blocks 2 to ensure that the symmetrically arranged semi-circular ring blocks 2 are fitted as a single unit around the grouting pipe 1. A common clamping plate 3 is fitted around both semi-circular ring blocks 2. The two semi-circular ring blocks 2 have mating threads on their outer sidewalls and the inner sidewall of the clamping plate 3. The clamping plate 3 secures the semi-circular ring blocks 2 together. Movable grooves for the clamping plate 3 are provided on the outer sidewalls of the two semi-circular ring blocks 2. Each component has a limiting sliding pusher 4. This invention uses the pusher 4 to move the elastic sealing plug 5 to seal the gap, thus achieving sealing. Each pusher 4 has an elastic sealing plug 5 outside for sealing the gap between the grouting pipe 1 and the hole wall. Inside the pusher 4 is a pressing component 6 for sealing both sides of the elastic sealing plug 5. This invention uses the pressing component 6 to press and seal both sides of the elastic sealing plug 5, thereby preventing leakage between the elastic sealing plugs 5. Each semi-circular ring block 2 has a first oil passage 7 and a second oil passage 8. The first oil passage 7 has one end inside the hole that penetrates the semi-circular ring block 2. The grouting pipe end reinforcement component 9, which is pushed towards the borehole wall by hydraulic oil, reinforces the end of the grouting pipe 1 exposed outside the borehole. This reduces the vibration caused by pumping during the grouting process, which could lead to vibration of the elastic sealing plug 5 and prevent a leak between the elastic sealing plug 5 and the borehole wall. The second oil passage 8, located inside the borehole, is equipped with a pusher component 10, which is pressed and sealed against both sides of the elastic sealing plug 5 by a pressing component 6 driven by hydraulic oil. The pusher component 10 includes a pusher column 1001 slidably connected to the second oil passage 8 via a return spring. The invention reinforces the second oil passage 8 by injecting hydraulic oil... The pressurized oil will push the push column 1001 to move. A wedge block 1002 is provided at one end of the push column 1001. The clamping assembly 6 includes two arc rings 601 symmetrically arranged inside the push frame 4 and slidably connected to the push frame 4. The movement of the push column 1001 will push the wedge block 1002 to move. The movement of the wedge block 1002 will push the two arc rings 601 to move in opposite directions. The arc rings 601 are connected to the push frame 4 by a contraction spring. The ends of the two arc rings 601 that are close to each other are provided with a bevel 602. The bevel 602 between the two arc rings 601 together form a wedge groove that wedges with the wedge block 1002.

[0021] One of the semicircular ring blocks 2 has two first hinged lugs 201 symmetrically arranged at one end outside the hole. Each of the semicircular ring blocks 2 has a cylinder 202 that mates with the first hinged lug 201 at one end outside the hole. The first hinged lug 201 and the cylinder 202 are hinged together by a pin. The other semicircular ring block 2 has two fixing lugs 203 symmetrically arranged at one end outside the hole. A screw 204 is provided on the circumferential side wall of the cylinder 202. A nut is threaded onto the screw 204. The fixing lug 203 has a slot 205 that mates with the screw 204. This invention achieves rapid assembly by inserting the screw 204 into the slot 205 and then tightening the nut.

[0022] The pusher frame 4 includes two arc-shaped plates 401 that are symmetrically distributed vertically and connected by a connecting plate. Each of the two arc-shaped plates 401 has an arc-shaped groove 402 at both ends on opposite sides that limits the movement of the arc-shaped ring 601. The arc-shaped plates 401 limit the sliding of the arc-shaped ring 601. A contraction spring connected to the arc-shaped ring 601 is installed within the arc-shaped groove 402. The contraction spring allows the arc-shaped ring 601 to reset under its elastic force. A pressure plate 403 is located at the top of the top arc-shaped plate 401 to press the elastic sealing plug 5. The pressure plate 403 presses the elastic sealing plug 5 to prevent leakage between the elastic sealing plug 5 and the hole wall.

[0023] The elastic sealing plug 5, from front to back, comprises a guide section 501, a sealing section 502, and an extension section 503, all integrally injection molded. The guide section 501 and extension section 503 are both semi-circular annular portions. The sealing section 502 is a hollow semi-circular frustum 5021. The inner walls of the sealing section 502 and extension section 503 are provided with receiving grooves 5022 for placing the pusher 4. By providing the receiving grooves 5022, the pusher 4 is placed within them, thereby pushing the elastic sealing plug 5 to press firmly against the hole, achieving a seal. (Two hollow...) Each of the two sides of the semicircular truncated cone 5021 is provided with a side sealing layer 5023. By setting the side sealing layer 5023, the arc ring 601 moves to make the two side sealing layers 5023 stick together and squeeze, thereby achieving side sealing of the elastic sealing plug 5. The outer diameter of the semicircular part of the guide section 501 is smaller than the outer diameter of the semicircular part of the extension section 503. The semicircular part of the extension section 503 is provided with a pressure groove on the side away from the hole, which cooperates with the pressure plate 403. By setting the pressure groove, the present invention enables the pressure plate 403 to push the elastic sealing plug 5 to seal.

[0024] The grouting pipe end reinforcement component 9 includes a telescopic column 901 connected to the inner wall of the first oil passage 7 via a spring. The telescopic column 901 penetrates the side wall of the semi-circular ring block 2. By setting the grouting pipe end reinforcement component 9, the invention injects hydraulic oil into the first oil passage 7, which pushes the telescopic column 901 to squeeze the hole wall, thereby achieving internal support and fixing the semi-circular ring block 2. This reinforces the end of the grouting pipe 1 and prevents the elastic sealing plug 5 from moving due to the injection of grouting liquid, which could easily lead to pore leakage.

[0025] The grouting pipe 1 has a grouting section 101 located at one end inside the hole. The grouting section 101 has multiple grouting holes arranged in a circumferential array. An elastic rubber layer 102 is spirally wound around the outside of the grouting section 101. By setting the elastic rubber layer 102, during grouting, the elastic rubber layer 102 is expanded by the grout and flows out from the gap between each turn of the elastic rubber layer 102. After the grouting is completed, it returns to normal under the elastic force of the elastic rubber layer 102 and seals the grouting hole, thereby achieving a check valve function and enabling secondary grouting.

[0026] It also includes a leak-proof sealing assembly 11, which includes a leak-proof sealing corrugated expansion tube 1101. One end of the leak-proof sealing corrugated expansion tube 1101 is provided with a sealing pressure ring 1102, which is fixedly connected to the pressure plate 3 by bolts. In use, the sealing pressure ring 1102 is fixed to the pressure plate 3 by bolts. The other end of the leak-proof sealing corrugated expansion tube 1101 is connected to a pressure cylinder 1103, and the other end of the pressure cylinder 1103 is rotatably connected to a rotating plate. The rotating plate has a screw hole that mates with the thread on the semi-circular ring block 2. This invention uses a rotating plate to... The dynamic pressure cylinder 1103, under the action of the thread, moves closer to the wall and squeezes the anti-leakage sealing corrugated expansion tube 1101, pressing it against the wall. The outer wall of the anti-leakage sealing corrugated expansion tube 1101 is equipped with a powder filling valve and a filter exhaust valve, which are not shown in the figure. In this invention, anti-leakage powder is injected into the powder filling valve and filtered by the filter exhaust valve, so that the anti-leakage powder is retained inside the anti-leakage sealing corrugated expansion tube 1101. The anti-leakage powder solidifies after encountering water, achieving secondary anti-leakage.

[0027] A first hydraulic oil filling valve is provided at one end outside the first oil passage 7 hole, and a second hydraulic oil filling valve is provided at one end outside the second oil passage 8 hole. The first and second hydraulic oil filling valves are not shown in the figure. By setting the first and second hydraulic oil filling valves, the present invention facilitates the filling of hydraulic oil into the first oil passage 7 and the second oil passage 8.

[0028] In use, since the clamping plate 3 is sleeved on the two semi-circular ring blocks 2, and the two semi-circular ring blocks 2 have movable grooves on the side walls of their outer ends outside the holes for the clamping plate 3 to move, by sleeved on the outer wall of the grouting pipe 1 at a suitable position, and since the pusher 4 is limited to sliding on the outer wall of the semi-circular ring blocks 2, and the pusher 4 is sleeved with an elastic sealing plug 5, then the screw 204 is inserted into the slot 205 of the fixing ear 203, and by tightening the nut, the semi-circular ring blocks 2 and the grouting pipe 1 are fixed together. Then, the clamping plate 3 is threadedly connected to the threads on the outer walls of the two semi-circular ring blocks 2. Next, a certain pressure is manually applied to insert the grouting pipe 1 into the hole to be grouted. After the grouting pipe 1 is inserted, the guide section 501 acts as a guide, allowing the elastic sealing plug 5 to smoothly enter the hole. Under continued pressure, the sealing section 502 connects and seals with the hole opening. Simultaneously, the sealing section 502 can adapt to holes of different diameters, improving the applicability of the invention, thereby sealing the hole. Then, by... Hydraulic oil is injected into the two first oil passages 7, which pushes the telescopic column 901 to squeeze against the hole wall, thereby achieving internal support fixation and fixing the semi-circular ring block 2. The fixing of the semi-circular ring block 2 will fix the grouting pipe 1 with the inner clamping sleeve, thereby reinforcing the end of the grouting pipe 1 and preventing the elastic sealing plug 5 from moving and causing leakage due to the injection of grouting liquid. Then, by rotating the clamping plate 3, the clamping force of the elastic sealing plug 5 on the hole is further adjusted, which will further improve the sealing effect. Then, by adding hydraulic oil to the two first oil passages 7, the sealing force of the elastic sealing plug 5 on the hole is further adjusted, thereby improving the sealing effect. Hydraulic oil is added to the second oil passage 8. Under the action of the hydraulic oil, the hydraulic oil will push the push column 1001 to move. The movement of the push column 1001 will push the wedge block 1002 to move. The movement of the wedge block 1002 will push the two arc rings 601 to move in opposite directions. The movement of the two arc rings 601 in opposite directions will push the arc rings 601 in the two semi-circular ring blocks 2 to squeeze the side sealing layer 5023, thereby improving the sealing performance between the side sealing layers 5023 and preventing leakage from the gap between the side sealing layers 5023.

[0029] After the edge of the orifice dries, the sealing ring 1102 is fixedly connected to the pressure plate 403 with bolts. Then, by rotating the rotating plate, the rotating plate is threadedly connected to the outer wall of the semi-circular ring block 2. By continuing to rotate the rotating plate, under the action of the threads, the rotating plate pushes the pressure cylinder 1103 to press the anti-leakage sealing corrugated expansion tube 1101 tightly against the orifice wall. Then, by opening the powder filling valve and the filter exhaust valve, anti-leakage powder is injected into the cavity formed by the anti-leakage sealing corrugated expansion tube 1101 and the wall. After being filtered by the filter exhaust valve, the anti-leakage powder is left inside the anti-leakage sealing corrugated expansion tube 1101. The anti-leakage powder solidifies after encountering water, achieving secondary anti-leakage.

[0030] After grouting and after a period of use, the elastic seal plug 5 can be further compressed by tightening the rotating plate to achieve a sealing effect again, thus avoiding the situation where the elastic seal plug 5 is difficult to seal due to geological changes.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for preventing water seepage in coal mines, comprising a grouting pipe, characterized in that, The grouting pipe is symmetrically fitted with semi-circular ring blocks, and the two semi-circular ring blocks are fitted with the same clamping plate. The two semi-circular ring blocks have mating threads on their outer sidewalls and the inner sidewall of the clamping plate. The outer sidewalls of the two semi-circular ring blocks have movable grooves for the clamping plate to move. Each semi-circular ring block has a sliding pusher frame on its outer sidewall. Each pusher frame has an elastic sealing plug for sealing the gap between the grouting pipe and the hole wall. The pusher frame contains a clamping assembly for sealing both sides of the elastic sealing plug. Each semi-circular ring block has a first oil passage and a second oil passage. The first oil passage has a through-hole at its inner end. A grouting pipe end reinforcement assembly that passes through a semi-circular ring block and is pushed towards the hole wall by hydraulic oil; a push assembly that is pushed by hydraulic oil to press and seal the two sides of the elastic sealing block at one end of the second oil passage located in the hole; the push assembly includes a push column that is slidably connected to the second oil passage by a return spring; a wedge block is provided at one end of the push column; the pressing assembly includes two arc-shaped rings that are symmetrically arranged in the push frame and slidably connected to the push frame; the arc-shaped rings are connected to the push frame by a contraction spring; the two arc-shaped rings have beveled openings at their close ends; the beveled openings between the two arc-shaped rings together form a wedge groove that wedges and fits with the wedge block; It also includes a leak-proof sealing assembly, which includes a leak-proof sealing corrugated expansion tube. One end of the leak-proof sealing corrugated expansion tube is provided with a sealing pressure ring, which is fixedly connected to a pressure plate by bolts. The other end of the leak-proof sealing corrugated expansion tube is connected to a pressure cylinder, and the other end of the pressure cylinder is rotatably connected to a rotating plate. The rotating plate has a screw hole that mates with the thread on the semi-circular ring block. The outer wall of the leak-proof sealing corrugated expansion tube is provided with a powder filling valve and a filter exhaust valve.

2. The sealing device for preventing water seepage in coal mines according to claim 1, characterized in that, One of the semicircular ring blocks has two first hinged lugs symmetrically arranged at one end outside the hole. Each of the semicircular ring blocks has a cylinder that mates with the first hinged lug at one end outside the hole. The first hinged lug and the cylinder are hinged together by a pin. The other semicircular ring block has two fixed lugs symmetrically arranged at one end outside the hole. The cylinder has a screw on its circumferential sidewall, and a nut is threaded onto the screw. The fixed lug has a slot that mates with the screw.

3. A sealing device for preventing water seepage in coal mines according to claim 1, characterized in that, The push frame includes two arc-shaped plates that are symmetrically distributed vertically and connected by a connecting plate. Both ends of the opposite side of the two arc-shaped plates are provided with arc-shaped grooves that cooperate with the arc-shaped ring for limiting. A contraction spring connected to the arc-shaped ring is provided in the arc-shaped groove. A pressure plate for pressing the elastic seal is provided on the top of the top arc-shaped plate.

4. A sealing device for preventing water seepage in coal mines according to claim 3, characterized in that, The elastic sealing plug comprises, from front to back, a guide section, a sealing section, and an extension section, all integrally injection molded. The guide section and the extension section are both semi-circular rings, and the sealing section is a hollow semi-circular frustum. The inner sidewalls of the sealing section and the extension section are provided with receiving grooves for placing the pusher frame. Each of the two hollow semi-circular frustums has a side sealing layer on one side facing each other. The outer diameter of the semi-circular ring of the guide section is smaller than the outer diameter of the semi-circular ring of the extension section. The semi-circular ring of the extension section has a pressure groove on the side away from the hole that mates with the pressure plate.

5. A sealing device for preventing water seepage in coal mines according to claim 1, characterized in that, The grouting pipe end reinforcement assembly includes a telescopic column connected to the inner wall of the first oil passage via a spring, and the telescopic column penetrates the side wall of the semi-circular ring block.

6. A sealing device for preventing water seepage in coal mines according to claim 1, characterized in that, The grouting pipe has a grouting section at one end inside the hole. The grouting section has multiple grouting holes arranged in a circumferential array. An elastic rubber layer is spirally wound around the outside of the grouting section.

7. A sealing device for preventing water seepage in coal mines according to claim 1, characterized in that, A first hydraulic oil filling valve is provided at one end outside the first oil passage hole, and a second hydraulic oil filling valve is provided at one end outside the second oil passage hole.

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