Mine liquid injection hole sealing device and hole sealing method

Abstract

The invention discloses a mine liquid injection hole sealing device and a hole sealing method, and belongs to the technical field of mine mining. A mine liquid injection hole sealing device comprises a first plugging mechanism, a second plugging mechanism and a pressurizing mechanism, and the first plugging mechanism and the second plugging mechanism are connected through the pressurizing mechanism. The first plugging mechanism, the second plugging mechanism and the pressurizing mechanism are all arranged outside the extraction pipe, one end of the first plugging mechanism is fixed to the extraction pipe, the other end of the first plugging mechanism is in sliding connection with the extraction pipe, and the pressurizing mechanism and the second plugging mechanism are both in sliding connection with the extraction pipe; an inflation structure for inflating the inside and an exhaust structure for exhausting are arranged among the first plugging mechanism, the second plugging mechanism and the pressurizing mechanism, and a liquid injection structure is arranged on the second plugging mechanism. According to the mine liquid injection hole sealing device and the hole sealing method, the problem that an existing hole sealing device is not easy to recycle can be solved, and the mine liquid injection hole sealing device and the hole sealing method have the advantage of being good in hole sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of mine mining, and in particular to a mine liquid injection hole sealing device and a hole sealing method. Background Art

[0002] Mine extraction is an important coal mine safety measure, which aims to reduce the concentration of gas (mainly methane) in the mine, prevent gas explosion accidents, and recycle gas as energy. Gas extraction is to drill a hole in the tunnel, insert an extraction pipe into the borehole, and fill the plugging material between the extraction pipe and the borehole. The extraction pipe is connected to negative pressure, and the gas in the coal seam near the borehole is extracted by negative pressure. The commonly used plugging material for borehole extraction is cement slurry, which is used to plug the cracks in the borehole rock formation to reduce the overflow of methane. Since the cement slurry shrinks after solidification, the plugging effect is poor. And as the mining progresses, new cracks will form in the rock formation, causing methane to overflow, affecting the methane extraction effect.

[0003] The existing patent CN202110710454.8 discloses a reusable sealer for gas extraction through-layer drilling in underground coal mines and its operation method, including a first expansion capsule and a second expansion capsule coaxially installed on the gas extraction pipe, and also including a first injection connection pipe, a second injection connection pipe, an intermediate injection connection pipe, a first injection inlet pipe and a second injection inlet pipe all parallel to the gas extraction pipe; the first injection connection pipe is provided with a first injection hole connected to the inner cavity of the first expansion capsule; the second injection connection pipe is provided with a second injection hole connected to the inner cavity of the second expansion capsule; the intermediate injection connection pipe is provided with a pressure-bearing one-way valve; the second injection inlet pipe is provided with a pressure gauge and a valve. The present invention has a scientific principle, a simple structure, and is easy to operate, and realizes the functions of monitoring the sealing pressure of the gas extraction drilling sealer, refilling the sealer when the sealing pressure is reduced to increase the sealing pressure, and the sealer can be recycled and reused after the gas extraction operation is completed, which can effectively realize the reuse of materials and reduce the sealing cost. Although the above patent improves the sealing effect by replenishing liquid, the above patent adopts the method of injecting liquid into the inflatable airbag to achieve liquid blocking. Since the blocking liquid has a certain viscosity, the liquid in the airbag is not easy to be discharged cleanly, which affects the recycling of the airbag. Summary of the invention

[0004] The purpose of the present invention is to provide a mine liquid injection hole sealing device and a hole sealing method, so as to solve the problem that the existing hole sealing device is not suitable for recycling.

[0005] To achieve the above-mentioned objectives, the present invention provides a mine liquid injection and sealing device, comprising a first sealing mechanism, a second sealing mechanism and a pressurizing mechanism, wherein the first sealing mechanism is connected to the second sealing mechanism via a pressurizing mechanism; the first sealing mechanism, the second sealing mechanism and the pressurizing mechanism are all arranged on the outside of an extraction pipe, one end of the first sealing mechanism is fixed on the extraction pipe, and the other end of the first sealing mechanism is slidably connected to the extraction pipe, and the pressurizing mechanism and the second sealing mechanism are both slidably connected to the extraction pipe; an inflation structure for inflating air into the interior and an exhaust structure for exhausting air are arranged between the first sealing mechanism, the second sealing mechanism and the pressurizing mechanism, and a liquid injection structure is arranged on the second sealing mechanism.

[0006] Preferably, the first blocking mechanism includes a fixed seat and a first sliding seat, the fixed seat is fixed on the extraction tube, the first sliding seat is slidably connected to the extraction tube, a first inner capsule layer is arranged between the fixed seat and the first sliding seat, a first air cavity is arranged inside the first inner capsule layer, a plurality of clamping structures are hinged in a circular array on the fixed seat and the first sliding seat, a first outer capsule layer is arranged between the clamping structures of the fixed seat and the first sliding seat, a first sealing cavity is arranged inside the first outer capsule layer, and the first sealing cavity and the first air cavity are connected through a first pressure-bearing one-way valve.

[0007] Preferably, the second blocking mechanism includes a second sliding seat and a third sliding seat, both of which are slidably connected to the extraction tube, a second inner capsule layer is arranged between the second sliding seat and the third sliding seat, a second air cavity is arranged inside the second inner capsule layer, a plurality of clamping structures are hinged in a circular array on the second sliding seat and the third sliding seat, a second outer capsule layer is arranged between the clamping structures of the second sliding seat and the third sliding seat, a second sealing cavity is arranged inside the second outer capsule layer, and the second sealing cavity is connected to the second air cavity via a second pressure-bearing one-way valve.

[0008] Preferably, the pressurizing mechanism comprises a pressurizing airbag, both ends of which are respectively fixed on the first sliding seat and the third sliding seat, a pressurizing air cavity is arranged inside the pressurizing airbag, and a liquid cavity for liquid injection is formed between the pressurizing airbag and the inner wall of the drill hole.

[0009] Preferably, a plurality of first sealing convex rings are uniformly arranged in a linear array on the inner wall of the first inner bag layer close to the extraction tube; a plurality of third sealing convex rings are uniformly arranged in a linear array on the inner wall of the second inner bag layer close to the extraction tube; a plurality of second sealing convex rings are uniformly arranged in a linear array on the inner wall of the pressurized air bag close to the extraction tube, and the first sealing convex ring, the second sealing convex block and the third sealing convex ring are used for sealing between the first inner bag layer, the pressurized air bag and the second inner bag layer and the extraction tube; sealing convex rings or sealing convex points for sealing with the drilled hole are arranged on the outer surfaces of the first outer bag layer and the second outer bag layer.

[0010] Preferably, the inflation structure includes an air inlet pipe, which is provided with a pressure gauge, the air outlet end of the air inlet pipe is connected to the air pipe provided at the air inlet hole on the second slide, the third slide is provided with a third connecting hole, the first slide is provided with a first connecting hole, and second connecting holes are provided at both ends of the pressurized airbag. The pressurized airbag connects the first air cavity with the pressurized air cavity through the second connecting hole and the first connecting hole at one end, and connects the second air cavity with the pressurized air cavity through the second connecting hole and the third connecting hole at the other end.

[0011] Preferably, the injection structure includes an injection tube, a liquid passing tube is provided inside the second sealed cavity, one end of the liquid passing tube is connected to the injection tube, and the other end of the liquid passing tube is connected to the liquid outlet tube, and the liquid outlet end of the liquid outlet tube is located outside the pressurized airbag.

[0012] Preferably, the exhaust structure includes an exhaust pipe, which is connected to the exhaust port provided on the second slide seat, a connecting pipe is provided inside the second air cavity, the connecting pipe is inserted from the second air cavity into the second sealed cavity, two ends of the connecting pipe are respectively connected to the exhaust port and the third through hole provided on the third slide seat, a second through hole connecting the third through hole with the pressurized air cavity is provided at one end of the pressurized air bag, a first through hole is provided on the first slide seat, and a second through hole connecting the first through hole with the pressurized air cavity is provided at the other end of the pressurized air bag; the air inlet of the connecting pipe is located in the first sealed cavity, and valves are provided on a section of the connecting pipe located inside the first sealed cavity, the second sealed cavity and the pressurized air cavity; a second exhaust hole for discharging the gas in the second air cavity is provided on the second slide seat, and a first exhaust hole for discharging the gas in the first air cavity is provided on the fixed seat.

[0013] Preferably, the clamping structure includes an outer tube, which is hinged to a fixed seat, a first slide seat, a second slide seat, and a third slide seat. The first outer bag layer and the second outer bag layer are fixed on the outer tube. A push rod is slidingly arranged inside the outer tube, and a spike is arranged at the end of the push rod. A spring is arranged between the push rod and the outer tube to apply outward thrust to the push rod.

[0014] The sealing method based on the above-mentioned mine liquid injection sealing device includes the following steps: S1. Insert the extraction tube into the borehole. After the extraction tube is inserted into place, turn on the air pump, and the gas enters the second air cavity through the air inlet pipe and the air inlet hole. The gas in the second air cavity enters the pressurized air cavity and the first air cavity through the third connecting hole, the second connecting hole and the first connecting hole. The first inner capsule layer, the second inner capsule layer and the pressurized airbag are inflated. At the same time, the first slide seat, the second slide seat and the third slide seat slide along the extraction tube under the action of the gas, the sealing device expands, and the pressurized airbag discharges the air in the liquid cavity from both ends. S2. Continue to fill the first air cavity, the second air cavity and the pressurized air cavity with gas through the air inlet pipe. The gas pressure in the first air cavity and the second air cavity increases. After exceeding the pressure of the first pressure-bearing one-way valve and the second pressure-bearing one-way valve, the first pressure-bearing one-way valve and the second pressure-bearing one-way valve open, and the gas enters the first sealed cavity and the second sealed cavity. The first outer bag layer and the second outer bag layer are inflated and expanded. The first outer bag layer and the second outer bag layer respectively drive the outer tube fixed thereon to expand. The outer tube drives the mandrel to rotate. The mandrel is fixed on the ore layer by stabs. The first outer bag layer and the second outer bag layer continue to expand to seal the borehole and the ore layer. S3, start the injection pump, the injection pump injects the plugging liquid into the liquid pipe through the injection pipe, and then enters the liquid cavity through the liquid outlet pipe. As the plugging liquid compresses the pressurized airbag, the gas in the pressurized airbag enters the first air cavity and the second air cavity through the second connecting hole, and then enters the first sealed cavity and the second sealed cavity. The first outer bag layer and the second outer bag layer continue to expand, further sealing the borehole to improve the sealing effect; as the plugging liquid is injected, the plugging liquid is injected into the cracks of the ore layer to plug the cracks; S4, the pressure of the pressurized airbag is maintained until the plugging liquid fully enters the cracks; as mining progresses, new cracks are generated, the plugging liquid in the liquid cavity is reduced, the pressurized airbag expands, the pressure on the pressure gauge decreases, and the air pump is used to refill the pressurized airbag with gas, and the plugging liquid in the liquid cavity is pressurized by the pressurized airbag, so that the plugging liquid enters the newly generated cracks and plugs the new cracks; S5. After the gas extraction is completed, the vacuum pump extracts the gas in the second sealed cavity, the pressurized gas cavity and the first sealed cavity through the exhaust pipe and the valve, the first outer bag layer, the second outer bag layer and the pressurized air bag shrink, and the gas in the first air cavity and the second air cavity is discharged through the first pressure-bearing one-way valve, the second pressure-bearing one-way valve and the second connecting hole; so that the sealing device can move to the next stage in the borehole for sealing and extraction.

[0015] The advantages and positive effects of the mine liquid injection hole sealing device and hole sealing method described in the present invention are: 1. In the present invention, one end of the first plugging mechanism is fixed on the extraction tube, and the pressurizing mechanism and the second plugging mechanism are both slidably connected to the extraction tube. The sliding connection method allows the first plugging mechanism, the second plugging mechanism and the pressurizing mechanism to be folded together, which is convenient for the storage and storage of the sealing device.

[0016] 2. The first plugging mechanism and the second plugging mechanism are both provided with a clamping structure, which drives the outer tube to unfold through the first outer bag layer and the second outer bag layer; a push rod is slidably provided inside the outer tube, and a spring is provided between the push rod and the outer tube to apply an outward thrust to the push rod. The spring pushes the push rod tightly in the ore layer, thereby improving the stability of the sealing device in the drill hole, which is beneficial to improving the sealing effect.

[0017] 3. The drill hole is sealed through the first sealing cavity and the second sealing cavity. Gas is introduced into the first sealing cavity and the second sealing cavity. The sealing effect is improved in combination with the clamping structure, which facilitates the discharge of the gas filled in the first sealing cavity and the second sealing cavity and is beneficial to the recycling of the sealing device.

[0018] 4. The pressurized air cavity pressurizes the plugging liquid so that the plugging liquid can be fully and timely filled into the cracks of the ore layer to plug the cracks and improve the sealing effect.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a front view structural schematic diagram of an embodiment of the present invention; Figure 3 For attachment Figure 1 Middle A enlarged view; Figure 4 It is a schematic diagram of the three-dimensional structure of the first blocking mechanism according to an embodiment of the present invention; Figure 5 The cross-sectional structure of the first blocking mechanism of the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 6 The cross-sectional structure of the first blocking mechanism of the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 7 It is a schematic diagram of the three-dimensional structure of the second blocking mechanism according to an embodiment of the present invention; Figure 8 The cross-sectional structure of the second blocking mechanism of the embodiment of the present invention is shown in FIG. Figure 1 ; Fig. 9 The cross-sectional structure of the second blocking mechanism of the embodiment of the present invention is shown in FIG. Figure 2 ; Fig.10 It is a schematic diagram of the three-dimensional structure of the pressurizing mechanism according to an embodiment of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of a pressurizing mechanism according to an embodiment of the present invention; Fig.12 It is a schematic diagram of the cross-sectional structure of the first inflation stage of an embodiment of the present invention; Fig.13 It is a schematic diagram of the cross-sectional structure of the second inflation stage of an embodiment of the present invention; Fig.14 It is a schematic diagram of the cross-sectional structure of the liquid injection stage of an embodiment of the present invention; Fig.15It is a schematic diagram of the connection structure between the pressurizing mechanism and the second blocking mechanism according to an embodiment of the present invention; Fig.16 It is a schematic diagram of the connection structure between the pressurizing mechanism and the first blocking mechanism according to an embodiment of the present invention; Fig.17 For attachment Fig.13 Middle B is an enlarged view.

[0021] Reference numerals 1. first blocking mechanism; 11. fixed seat; 12. first sliding seat; 13. first inner capsule layer; 14. first air cavity; 15. first sealing convex ring; 16. first outer capsule layer; 17. first sealing cavity; 18. outer tube; 19. first communicating hole; 110. first through hole; 111. first exhaust hole; 112. first sliding hole; 113. first pressure-bearing one-way valve; 114. ejector rod; 115. stab; 116. spring; 2. Pressurizing mechanism; 21. Pressurizing airbag; 22. Pressurizing air cavity; 23. Second sealing convex ring; 24. Second communicating hole; 25. Second via hole; 3. Second blocking mechanism; 31. Second sliding seat; 32. Third sliding seat; 33. Second sliding hole; 34. Third sliding hole; 35. Air inlet hole; 36. Second air outlet hole; 37. Third connecting hole; 38. Second inner capsule layer; 39. Second air cavity; 310. Second outer capsule layer; 311. Second sealing cavity; 312. Liquid passage pipe; 313. Air outlet; 314. Third sealing convex ring; 315. Second pressure-bearing one-way valve; 4. Extraction pipe; 5. Ore layer; 6. Drill hole; 7. Air inlet pipe; 71. Pressure gauge; 8. Exhaust pipe; 81. Valve; 82. Connecting pipe; 9. Liquid injection pipe; 91. Liquid outlet pipe; 92. Liquid chamber. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 , Figure 2 As shown. A mine liquid injection sealing device comprises a first sealing mechanism 1, a second sealing mechanism 3 and a pressurizing mechanism 2, wherein the first sealing mechanism 1 and the second sealing mechanism 3 are connected via the pressurizing mechanism 2. The pressurizing mechanism 2 is used to pressurize the sealing liquid, so that the sealing liquid can enter the cracks in the ore layer 5 in time to seal the cracks. The first sealing mechanism 1, the second sealing mechanism 3 and the pressurizing mechanism 2 are all arranged outside the extraction pipe 4. The extraction pipe 4 is an existing structure, which is connected to the negative pressure system, and the gas in the ore layer 5 is extracted by the negative pressure system. One end of the first sealing mechanism 1 is fixed on the extraction pipe 4, so that one end of the entire sealing device is fixed on the extraction pipe 4. The other end of the first sealing mechanism 1 is slidably connected to the extraction pipe 4. The pressurizing mechanism 2 and the second sealing mechanism 3 are both slidably connected to the extraction pipe 4, and the sliding connection method enables the first sealing mechanism 1, the second sealing mechanism 3 and the pressurizing mechanism 2 to be folded together, which is convenient for the storage and storage of the sealing device.

[0025] like Figure 4 , Figure 5 , Figure 6 As shown. The first blocking mechanism 1 includes a fixed seat 11 and a first sliding seat 12. The fixed seat 11 is fixed on the extraction tube 4. A first sliding hole 112 is provided at the center of the first sliding seat 12. The first sliding seat 12 is slidably connected to the extraction tube 4 through the first sliding hole 112. A first inner capsule layer 13 is provided between the fixed seat 11 and the first sliding seat 12. The two ends of the first inner capsule layer 13 are respectively fixed on the first sliding seat 12 and the fixed seat 11. A first air cavity 14 is provided inside the first inner capsule layer 13. A plurality of clamping structures are hinged in a circular array on the fixed seat 11 and the first sliding seat 12. The clamping structures are used to fix the outer capsule layer and provide support for the entire device. A first outer capsule layer 16 is provided between the clamping structures of the fixed seat 11 and the first sliding seat 12. The two ends of the first outer capsule layer 16 are respectively fixed on the outer tube 18 of the clamping structure. A first sealed cavity 17 is disposed inside the first outer bag layer 16 , and the first sealed cavity 17 is connected to the first air cavity 14 via a first pressure-bearing one-way valve 113 .

[0026] like Figure 7 , Figure 8 , Fig. 9As shown. The second blocking mechanism 3 includes a second sliding seat and a third sliding seat. A second sliding hole 33 is provided at the center of the second sliding seat, and a third sliding hole 34 is provided at the center of the third sliding seat. The second sliding seat and the third sliding seat are slidably connected to the extraction tube 4 through the second sliding hole 33 and the third sliding hole 34, respectively. A second inner capsule layer 38 is provided between the second sliding seat and the third sliding seat, and a second air cavity 39 is provided inside the second inner capsule layer 38. The two ends of the second inner capsule layer 38 are respectively fixed on the second sliding seat and the third sliding seat. Several clamping structures are hinged in a circular array on the second sliding seat and the third sliding seat. A second outer capsule layer 310 is provided between the clamping structures of the second sliding seat and the third sliding seat, and a second sealing cavity 311 is provided inside the second outer capsule layer 310. The second sealing cavity 311 is connected to the second air cavity 39 through a second pressure-bearing one-way valve 315.

[0027] The first air cavity 14 and the second air cavity 39 are used to deploy the sealing device, and the first sealing cavity 17 and the second sealing cavity 311 are used to seal and plug the drill hole 6. The first inner bag layer 13, the first outer bag layer 16, the second inner bag layer 38, and the second outer bag layer 310 are all made of elastic air bags, which are elastic bags with a certain pressure bearing capacity.

[0028] like Fig.10 , Fig.11 As shown. The pressurizing mechanism 2 includes a pressurizing airbag 21, and the two ends of the pressurizing airbag 21 are respectively fixed on the first sliding seat 12 and the third sliding seat. A pressurizing air chamber 22 is provided inside the pressurizing airbag 21, and a liquid chamber 92 for liquid injection is formed between the pressurizing airbag 21 and the inner wall of the borehole 6. The pressurizing airbag 21 is also an elastic bag with a certain pressure bearing capacity.

[0029] A plurality of first sealing convex rings 15 are uniformly arranged in a linear array on the inner wall of the first inner capsule layer 13 near the extraction tube 4. A plurality of third sealing convex rings 314 are uniformly arranged in a linear array on the inner wall of the second inner capsule layer 38 near the extraction tube 4. A plurality of second sealing convex rings 23 are uniformly arranged in a linear array on the inner wall of the pressurized airbag 21 near the extraction tube 4. The first sealing convex ring 15, the second sealing convex block, and the third sealing convex ring 314 are used for sealing between the first inner capsule layer 13, the pressurized airbag 21, and the second inner capsule layer 38 and the extraction tube 4. Sealing convex rings or sealing convex points for sealing with the borehole 6 are fixedly arranged on the outer surfaces of the first outer capsule layer 16 and the second outer capsule layer 310.

[0030] like Fig.15 , Fig.16As shown. An inflation structure for inflating air into the first blocking mechanism 1, the second blocking mechanism 3 and the pressurizing mechanism 2 is provided between them. The inflation structure includes an air inlet pipe 7, on which a pressure gauge 71 is provided for monitoring the gas pressure in the pressurized air chamber 22. The air outlet end of the air inlet pipe 7 is connected to the air pipe provided at the air inlet hole 35 on the second slide 31 through a quick connector. A third connecting hole 37 is provided on the third slide 32, a first connecting hole 19 is provided on the first slide, and second connecting holes 24 are provided at both ends of the pressurized airbag 21. The pressurized airbag 21 connects the first air chamber 14 with the pressurized air chamber 22 through the second connecting hole 24 and the first connecting hole 19 at one end, and connects the second air chamber 39 with the pressurized air chamber 22 through the second connecting hole 24 and the third connecting hole 37 at the other end. The first air chamber 14 , the second air chamber 39 and the pressurized airbag 21 are connected into a whole through the first communicating hole 19 , the second communicating hole 24 and the third communicating hole 37 .

[0031] An exhaust structure for exhausting air to the outside is provided between the first blocking mechanism 1, the second blocking mechanism 3 and the pressurizing mechanism 2. The exhaust structure includes an exhaust pipe 8, which is connected to the exhaust port 313 provided on the second slide seat 31 through a quick connector. A connecting pipe 82 is provided inside the second air cavity 39, and the connecting pipe 82 is inserted into the second sealed cavity 311 from the second air cavity 39. The two ends of the connecting pipe 82 are respectively connected to the exhaust port 313 and the third through hole provided on the third slide seat 32. A second through hole 25 is provided at one end of the pressurized air bag 21 to connect the third through hole with the pressurized air cavity 22. A first through hole 110 is provided on the first slide seat, and a second through hole 25 is provided at the other end of the pressurized air bag 21 to connect the first through hole 110 with the pressurized air cavity 22. The air inlet of the connecting pipe 82 is located in the first sealed cavity 17. A valve 81 is provided on a section of the connecting pipe 82 located inside the first sealed cavity 17, the second sealed cavity 311 and the pressurized air cavity 22. The connecting pipe 82 extracts the gas in the first sealed cavity 17, the second sealed cavity 311, the pressurized gas cavity 22, the first gas cavity 14, and the second gas cavity 39 through the valve 81. The second sliding seat 31 is provided with a second exhaust hole 36 for exhausting the gas in the second gas cavity 39, and the fixed seat 11 is provided with a first exhaust hole 111 for exhausting the gas in the first gas cavity 14. The gas in the airbag can be fully and quickly exhausted through the first exhaust hole 111 and the second exhaust hole 36.

[0032] The second plugging mechanism 3 is provided with a liquid injection structure. The liquid injection structure includes a liquid injection tube 9, which is connected to a liquid injection pump. A liquid passing tube 312 is provided inside the second sealed cavity 311, one end of the liquid passing tube 312 is connected to the liquid injection tube 9 through a quick connector, and the other end of the liquid passing tube 312 is connected to the liquid outlet tube 91 through a quick connector. The liquid outlet end of the liquid outlet tube 91 is located outside the pressurized airbag 21, and is used to inject the plugging liquid into the liquid cavity 92.

[0033] like Figure 3 , Fig.17 As shown. The clamping structure includes an outer tube 18, and the outer tube 18 is hinged with the fixed seat 11, the first slide seat, the second slide seat 31, and the third slide seat 32. The first outer bag layer 16 and the second outer bag layer 310 are fixed on the outer tube 18, and the outer tube 18 is driven to unfold by the first outer bag layer 16 and the second outer bag layer 310. A push rod 114 is provided for sliding inside the outer tube 18, and a spur 115 is fixedly provided at the end of the push rod 114. A spring 116 is provided between the push rod 114 and the outer tube 18 to apply an outward thrust to the push rod 114. The spring 116 presses the push rod 114 tightly in the ore layer 5, improves the stability of the sealing device in the borehole 6, and is conducive to improving the sealing effect.

[0034] The sealing method based on the above-mentioned mine liquid injection sealing device includes the following steps: S1, such as Fig.12 As shown. Assemble the air inlet pipe 7, the exhaust pipe 8, the injection pipe 9 and the liquid outlet pipe 91. Insert the extraction pipe 4 into the borehole 6. After the extraction pipe 4 is in place, turn on the air pump, and the gas enters the second air cavity 39 through the air inlet pipe 7 and the air inlet hole 35. The gas in the second air cavity 39 enters the pressurized air cavity 22 and the first air cavity 14 through the third connecting hole 37, the second connecting hole 24 and the first connecting hole 19, and the first inner capsule layer 13, the second inner capsule layer 38 and the pressurized airbag 21 are inflated. At the same time, the first slide seat, the second slide seat 31 and the third slide seat 32 slide along the extraction pipe 4 under the action of the gas, the sealing device expands, and the pressurized airbag 21 discharges the air in the liquid cavity 92 from both ends, reducing the amount of air entering the crack, reducing the resistance of air resistance to the injection of the plugging liquid, and facilitating the injection of the plugging liquid into the crack.

[0035] S2, such as Fig.13 As shown. Continue to fill the first air cavity 14, the second air cavity 39 and the pressurized air cavity 22 with gas through the air inlet pipe 7. The gas pressure in the first air cavity 14 and the second air cavity 39 increases. After exceeding the pressure of the first pressure-bearing one-way valve 113 and the second pressure-bearing one-way valve 315, the first pressure-bearing one-way valve 113 and the second pressure-bearing one-way valve 315 open, and the gas enters the first sealed cavity 17 and the second sealed cavity 311. The first outer bladder layer 16 and the second outer bladder layer 310 are inflated and expanded. The first outer bladder layer 16 and the second outer bladder layer 310 respectively drive the outer tube 18 fixed thereon to expand, and the outer tube 18 drives the top rod 114 to rotate. The top rod 114 is fixed to the mineral layer 5 through the spur 115. The first outer bladder layer 16 and the second outer bladder layer 310 continue to expand to seal the borehole 6 and the mineral layer 5. Stop air intake.

[0036] S3, such as Fig.14As shown. Start the injection pump, and the injection pump injects the plugging liquid into the liquid pipe 312 through the injection pipe 9, and then enters the liquid cavity 92 through the liquid outlet pipe 91. As the plugging liquid compresses the pressurized airbag 21, the gas in the pressurized airbag 21 enters the first air cavity 14 and the second air cavity 39 through the second connecting hole 24, and then enters the first sealing cavity 17 and the second sealing cavity 311. The first outer bladder layer 16 and the second outer bladder layer 310 continue to expand, further sealing the borehole 6 to improve the sealing effect. As the plugging liquid is injected, the plugging liquid is injected into the cracks of the ore layer 5 to seal the cracks. The pressurized air cavity 22 is subjected to the pressure of the plugging liquid, and the pressure of the pressure gauge 71 rises. When the pressure of the pressure gauge 71 reaches the set value, the grouting is stopped.

[0037] S4, the pressure of the pressurized airbag 21 is maintained until the plugging liquid fully enters the cracks, at which time the pressure of the pressure gauge 71 will drop slightly. As mining proceeds, new cracks are generated, the plugging liquid in the liquid cavity 92 decreases, the pressurized airbag 21 expands, and the pressure of the pressure gauge 71 decreases. When the pressure of the pressure gauge 71 drops to the set value, the air pump is used to refill the pressurized airbag 21 with gas, and the plugging liquid in the liquid cavity 92 is pressurized by the pressurized airbag 21, so that the plugging liquid enters the newly generated cracks and plugs the new cracks.

[0038] S5. After the gas extraction is completed, the vacuum pump extracts the gas in the second sealed cavity 311, the pressurized gas cavity 22 and the first sealed cavity 17 through the exhaust pipe 8 and the valve 81, the first outer bag layer 16, the second outer bag layer 310 and the pressurized air bag 21 shrink, and the gas in the first air cavity 14 and the second air cavity 39 is discharged through the first pressure-bearing one-way valve 113, the second pressure-bearing one-way valve 315 and the second connecting hole 24, so that the sealing device can move to the next stage in the borehole 6 for sealing and extraction.

[0039] Therefore, the use of the mine liquid injection sealing device and the sealing method described in the present invention can solve the problem that the existing sealing device is difficult to recycle and has the advantage of good sealing effect.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A mine liquid injection sealing device, characterized in that: It includes a first plugging mechanism, a second plugging mechanism and a pressurizing mechanism, and the first plugging mechanism is connected to the second plugging mechanism through the pressurizing mechanism; the first plugging mechanism, the second plugging mechanism and the pressurizing mechanism are all arranged on the outside of the extraction tube, one end of the first plugging mechanism is fixed on the extraction tube, and the other end of the first plugging mechanism is slidably connected to the extraction tube, and the pressurizing mechanism and the second plugging mechanism are both slidably connected to the extraction tube; an inflation structure for inflating air into the interior and an exhaust structure for exhausting air are arranged between the first plugging mechanism, the second plugging mechanism and the pressurizing mechanism, and a liquid injection structure is arranged on the second plugging mechanism.

2. A mine liquid injection sealing device according to claim 1, characterized in that: The first blocking mechanism includes a fixed seat and a first sliding seat, the fixed seat is fixed on the extraction tube, the first sliding seat is slidably connected to the extraction tube, a first inner capsule layer is arranged between the fixed seat and the first sliding seat, a first air cavity is arranged inside the first inner capsule layer, a plurality of clamping structures are hinged in a circular array on the fixed seat and the first sliding seat, a first outer capsule layer is arranged between the clamping structures of the fixed seat and the first sliding seat, a first sealing cavity is arranged inside the first outer capsule layer, and the first sealing cavity and the first air cavity are connected through a first pressure-bearing one-way valve.

3. A mine liquid injection sealing device according to claim 2, characterized in that: The second blocking mechanism includes a second sliding seat and a third sliding seat, both of which are slidably connected to the extraction tube, a second inner capsule layer is arranged between the second sliding seat and the third sliding seat, a second air cavity is arranged inside the second inner capsule layer, a plurality of clamping structures are hinged in a circular array on the second sliding seat and the third sliding seat, a second outer capsule layer is arranged between the clamping structures of the second sliding seat and the third sliding seat, a second sealing cavity is arranged inside the second outer capsule layer, and the second sealing cavity is connected to the second air cavity through a second pressure-bearing one-way valve.

4. A mine liquid injection sealing device according to claim 3, characterized in that: The pressurizing mechanism comprises a pressurizing airbag, the two ends of which are respectively fixed on the first sliding seat and the third sliding seat, a pressurizing air cavity is arranged inside the pressurizing airbag, and a liquid cavity for liquid injection is formed between the pressurizing airbag and the inner wall of the drill hole.

5. A mine liquid injection sealing device according to claim 4, characterized in that: A plurality of first sealing convex rings are evenly arranged in a linear array on the inner wall of the first inner bag layer close to the extraction tube; a plurality of third sealing convex rings are evenly arranged in a linear array on the inner wall of the second inner bag layer close to the extraction tube; a plurality of second sealing convex rings are evenly arranged in a linear array on the inner wall of the pressurized air bag close to the extraction tube, and the first sealing convex ring, the second sealing convex block and the third sealing convex ring are used for sealing between the first inner bag layer, the pressurized air bag and the second inner bag layer and the extraction tube; sealing convex rings or sealing convex points for sealing with the drilled hole are arranged on the outer surfaces of the first outer bag layer and the second outer bag layer.

6. A mine liquid injection sealing device according to claim 5, characterized in that: The inflation structure includes an air inlet pipe, which is provided with a pressure gauge. The air outlet end of the air inlet pipe is connected to the air pipe provided at the air inlet hole on the second slide seat, the third slide seat is provided with a third connecting hole, the first slide seat is provided with a first connecting hole, and both ends of the pressurized airbag are provided with second connecting holes. The pressurized airbag connects the first air cavity with the pressurized air cavity through the second connecting hole and the first connecting hole at one end, and connects the second air cavity with the pressurized air cavity through the second connecting hole and the third connecting hole at the other end.

7. A mine liquid injection sealing device according to claim 6, characterized in that: The injection structure includes an injection tube. A liquid passing tube is arranged inside the second sealed cavity. One end of the liquid passing tube is connected to the injection tube, and the other end of the liquid passing tube is connected to the liquid outlet tube. The liquid outlet end of the liquid outlet tube is located outside the pressurized airbag.

8. A mine liquid injection sealing device according to claim 7, characterized in that: The exhaust structure includes an exhaust pipe, which is connected to the exhaust port provided on the second slide seat, a connecting pipe is provided inside the second air cavity, the connecting pipe is inserted from the second air cavity into the second sealed cavity, two ends of the connecting pipe are respectively connected to the exhaust port and the third through hole provided on the third slide seat, a second through hole connecting the third through hole with the pressurized air cavity is provided at one end of the pressurized air bag, a first through hole is provided on the first slide seat, and a second through hole connecting the first through hole with the pressurized air cavity is provided at the other end of the pressurized air bag; the air inlet of the connecting pipe is located in the first sealed cavity, and valves are provided on a section of the connecting pipe located inside the first sealed cavity, the second sealed cavity and the pressurized air cavity; a second exhaust hole for discharging the gas in the second air cavity is provided on the second slide seat, and a first exhaust hole for discharging the gas in the first air cavity is provided on the fixed seat.

9. A mine liquid injection sealing device according to claim 8, characterized in that: The clamping structure includes an outer tube, which is hinged to a fixed seat, a first sliding seat, a second sliding seat, and a third sliding seat. The first outer bag layer and the second outer bag layer are fixed on the outer tube. A push rod is slidingly arranged inside the outer tube, and a spur is arranged at the end of the push rod. A spring is arranged between the push rod and the outer tube to apply outward thrust to the push rod.

10. A sealing method for a mine liquid injection sealing device according to claim 9, characterized in that: The following steps are involved: S1. Insert the extraction tube into the borehole. After the extraction tube is inserted into place, turn on the air pump, and the gas enters the second air cavity through the air inlet pipe and the air inlet hole. The gas in the second air cavity enters the pressurized air cavity and the first air cavity through the third connecting hole, the second connecting hole and the first connecting hole. The first inner capsule layer, the second inner capsule layer and the pressurized airbag are inflated. At the same time, the first slide seat, the second slide seat and the third slide seat slide along the extraction tube under the action of the gas, the sealing device expands, and the pressurized airbag discharges the air in the liquid cavity from both ends. S2. Continue to fill the first air cavity, the second air cavity and the pressurized air cavity with gas through the air inlet pipe. The gas pressure in the first air cavity and the second air cavity increases. After exceeding the pressure of the first pressure-bearing one-way valve and the second pressure-bearing one-way valve, the first pressure-bearing one-way valve and the second pressure-bearing one-way valve open, and the gas enters the first sealed cavity and the second sealed cavity. The first outer bag layer and the second outer bag layer are inflated and expanded. The first outer bag layer and the second outer bag layer respectively drive the outer tube fixed thereon to expand. The outer tube drives the mandrel to rotate. The mandrel is fixed on the ore layer by stabs. The first outer bag layer and the second outer bag layer continue to expand to seal the borehole and the ore layer. S3, start the injection pump, the injection pump injects the plugging liquid into the liquid pipe through the injection pipe, and then enters the liquid cavity through the liquid outlet pipe. As the plugging liquid compresses the pressurized airbag, the gas in the pressurized airbag enters the first air cavity and the second air cavity through the second connecting hole, and then enters the first sealed cavity and the second sealed cavity. The first outer bag layer and the second outer bag layer continue to expand, further sealing the borehole to improve the sealing effect; as the plugging liquid is injected, the plugging liquid is injected into the cracks of the ore layer to plug the cracks; S4, the pressure of the pressurized airbag is maintained until the plugging liquid fully enters the cracks; as mining progresses, new cracks are generated, the plugging liquid in the liquid cavity is reduced, the pressurized airbag expands, the pressure on the pressure gauge decreases, and the air pump is used to refill the pressurized airbag with gas, and the plugging liquid in the liquid cavity is pressurized by the pressurized airbag, so that the plugging liquid enters the newly generated cracks and plugs the new cracks; S5. After the gas extraction is completed, the gas extraction pump extracts the gas in the second sealed cavity, the pressurized gas cavity and the first sealed cavity through the exhaust pipe and the valve, the first outer bag layer, the second outer bag layer and the pressurized air bag shrink, and the gas in the first air cavity and the second air cavity is discharged through the first pressure-bearing one-way valve, the second pressure-bearing one-way valve and the second connecting hole; It is convenient for the sealing device to move to the next stage in the borehole for sealing and extraction.

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