Repairable downhole permanent barrier

Abstract

The application discloses a repairable underground permanent sealing wall, which comprises a main body and a repair assembly. The main body comprises a first wall body, a second wall body and a filling body. The first wall body and the second wall body are arranged in a roadway with a spacing, and both of the first wall body and the second wall body separate the roadway. The filling body is arranged in the spacing between the first wall body and the second wall body. The repair assembly comprises a slurry supply station and a slurry conveying pipe. The slurry supply station comprises a water supply pool and a slurry supply pool. One end of the slurry conveying pipe is communicated with the water supply pool, and the other end of the slurry conveying pipe is communicated with the spacing through the top of the first wall body or the second wall body to supply water to the spacing. After water seeps out of the outer surface of the first wall body or the second wall body, the slurry conveying pipe is disconnected from the water supply pool and connected with the slurry supply pool. The repair assembly of the repairable underground permanent sealing wall can find and repair the crack hidden danger in the main body of the permanent sealing wall in time, so that the crack is prevented from continuously expanding and the sealing effect of the permanent sealing wall is not lost.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, specifically to a repairable permanent sealing wall for underground mining. Background Technology

[0002] In coal mining, goaf areas usually accumulate large amounts of gas and residual coal, which can easily lead to safety accidents such as spontaneous combustion of residual coal and gas explosions. Therefore, permanent sealing walls are usually set up around goaf areas to seal them off, thereby preventing airflow from the roadways from leaking into the goaf areas and causing safety accidents.

[0003] In related technologies, due to the presence of mine pressure at the top of coal mine roadways, the fluctuation of mine pressure can cause the surrounding rock to move and crack in the permanent sealing wall, resulting in air leakage in the repairable underground permanent sealing wall and making it impossible to properly seal the goaf. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a repairable downhole permanent sealing wall in view of the defects and deficiencies of the prior art. The repair component of the repairable downhole permanent sealing wall can promptly detect and repair potential cracks in the main body of the permanent sealing wall, thereby preventing the cracks from continuing to expand and the sealing effect of the permanent sealing wall from failing.

[0005] The repairable permanent sealing wall in this invention includes: a main body comprising a first wall, a second wall, and a filler, wherein the first wall and the second wall are spaced apart within a roadway and both the first wall and the second wall isolate the roadway; and a repair component comprising a grout supply station and a grout delivery pipe, wherein the grout supply station comprises a water supply tank and a grout supply pool, one end of the grout delivery pipe is connected to the water supply pool, and the other end passes through the top of the first wall or the second wall and is connected to the space to supply water to the space; after water seeps out from the outer surface of the first wall or the second wall, the grout delivery pipe is disconnected from the water supply tank and connected to the grout supply pool.

[0006] According to an embodiment of the present invention, a repairable permanent sealing wall in a mine includes a main body and a repair component. The main body includes a first wall, a second wall, and a filler. The first wall and the second wall are spaced apart within a tunnel, and both the first wall and the second wall isolate the tunnel. The filler is disposed within the space between the first wall and the second wall. The repair component includes a grout supply station and a grout delivery pipe. The grout supply station includes a water supply tank and a grout supply pool. One end of the grout delivery pipe is connected to the water supply pool, and the other end passes through the top of the first wall or the second wall and connects to the space to supply water to the space. After water seeps out from the outer surface of the first wall or the second wall, the grout delivery pipe disconnects from the water supply tank and connects to the grout supply pool, thus achieving the repairability described in this application. In a permanent sealing wall in a well, the repair component can supply water to the space between the first and second walls via a grout delivery pipe connected to a water supply tank. When cracks exist in the first wall, the second wall, and the filling material, water can flow out from the cracks to the outer surface of the first or second wall, thereby detecting whether cracks have occurred in the main body. After confirming that cracks have occurred in the main body, the grout delivery pipe is switched to connect with the grout supply tank, thereby injecting grout into the cracks in the main body and completing the repair of the cracks. Therefore, compared with traditional technology, the repair component added in this application can promptly detect and repair potential cracks in the main body of the permanent sealing wall, preventing the cracks from continuing to expand and the sealing effect of the permanent sealing wall from failing.

[0007] In some embodiments, the repair assembly further includes an exhaust pipe, one end of which communicates with the spacer and the other end of which extends through the bottom of the first wall or the second wall.

[0008] In some embodiments, the water supply tank is equipped with a pressure gauge that can observe the pressure value of the water flowing into the slurry pipe from the water supply tank.

[0009] In some embodiments, the liquid in the slurry supply tank is either fly ash slurry or expanding mortar.

[0010] In some embodiments, the slurry supply tank is equipped with a stirrer that can periodically stir the liquid in the slurry supply tank.

[0011] In some embodiments, the grout supply tank is connected to the grout delivery pipe via a pneumatic grouting pump.

[0012] In some embodiments, the repairable underground permanent sealing wall further includes a monitoring component, which includes a camera, a data processing module, and an alarm. The camera can collect image information of the outer surfaces of the first wall and the second wall and transmit it to the data processing module. When the image information is abnormal, the data processing module can control the alarm to sound an alarm.

[0013] In some embodiments, both the water supply tank and the slurry supply tank are connected to the slurry delivery pipe via an electric valve. The electric valve is electrically connected to the data processing module, and the data processing module can control the opening and closing of the electric valve.

[0014] In some embodiments, the repairable downhole permanent sealing wall further includes an anchor, which includes a tension rod and nuts connected to both ends of the tension rod, the tension rod passing through the first wall and the second wall in sequence, and the nuts abutting against the outer surfaces of the first wall and the second wall.

[0015] In some embodiments, the anchors are multiple and are spaced apart along the height direction. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a repairable permanent sealing wall in a well according to an embodiment of the present invention.

[0017] Figure label:

[0018] 1. Main structure; 11. First wall; 12. Second wall; 13. Infill material;

[0019] 2. Repair components; 21. Grouting station; 211. Water supply tank; 212. Grouting tank; 213. Pressure gauge; 214. Electric valve; 22. Grout delivery pipe; 23. Exhaust pipe;

[0020] 3. Anchors; 31. Tension rods; 32. Nuts. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1 As shown, the repairable permanent sealing wall in this embodiment of the invention includes a main body 1 and a repair component 2.

[0023] Specifically, the main body 1 includes a first wall 11, a second wall 12, and a filler 13. The first wall 11 and the second wall 12 are spaced apart in the tunnel, and both the first wall 11 and the second wall 12 separate the tunnel. The filler 13 is located in the space between the first wall 11 and the second wall 12. The repair component 2 includes a grout supply station 21 and a grout delivery pipe 22. The grout supply station 21 includes a water supply tank 211 and a grout supply pool 212. One end of the grout delivery pipe 22 is connected to the water supply pool 211, and the other end passes through the top of the first wall 11 or the second wall 12 and is connected to the space between the two walls to supply water to the space. After water seeps out from the outer surface of the first wall 11 or the second wall 12, the grout delivery pipe 22 is disconnected from the water supply pool 211 and connected to the grout supply pool 212.

[0024] It should be noted that under the influence of surrounding rock activity, cracks may occur in the first wall 11, the second wall 12, and the filling material 13. Furthermore, the degree of cracking caused by surrounding rock activity of different intensities varies. Cracks caused by less intense surrounding rock activity are less severe and less likely to be detected by workers. In this application, a repair component 2 is added to the repairable permanent sealing wall in the well. The repair component 2 can supply grout to the first wall 11 and the second wall 12 via a grouting pipe 22 connected to the water supply tank 211. Water is supplied within the space between the bodies 12. When there are cracks in the first wall 11, the second wall 12, and the filling body 13, water can flow out from the cracks to the outer surface of the first wall 11 or the second wall 12, thereby completing the detection of whether the main body 1 has cracks. After it is determined that the main body 1 has cracks, the grout delivery pipe 22 is switched to connect with the grout supply tank 212, thereby inputting grout into the cracks of the main body 1 to complete the repair of the cracks of the main body 1, preventing the cracks of the main body 1 from continuing to expand and the sealing effect of the permanent sealing wall from failing.

[0025] It is understandable that water has better fluidity than other liquids, and in this application, the water flows from the top of the main body 1 to the bottom of the main body 1, thereby enabling comprehensive detection of cracks in the main body 1 and improving the reliability of crack detection by the repair component 2. In addition, under the lubricating effect of the water flow, the slurry can make more full contact with the crack surface, thereby improving the quality of crack repair.

[0026] It should be noted that crack monitoring of the main structure can be carried out periodically, or it can be carried out after a highly destructive operation such as blasting in the mine. This can help to detect potential safety hazards in the permanent sealed wall in a timely manner and improve the safety of the working environment for mine workers.

[0027] According to an embodiment of the present invention, a repairable permanent sealing wall in a mine includes a main body and a repair component. The main body includes a first wall, a second wall, and a filler. The first wall and the second wall are spaced apart within a tunnel, and both the first wall and the second wall isolate the tunnel. The filler is disposed within the space between the first wall and the second wall. The repair component includes a grout supply station and a grout delivery pipe. The grout supply station includes a water supply tank and a grout supply pool. One end of the grout delivery pipe is connected to the water supply pool, and the other end passes through the top of the first wall or the second wall and connects to the space to supply water to the space. After water seeps out from the outer surface of the first wall or the second wall, the grout delivery pipe disconnects from the water supply tank and connects to the grout supply pool, thus achieving the repairability described in this application. In a permanent sealing wall in a well, the repair component can supply water to the space between the first and second walls via a grouting pipe connected to a water supply tank. When cracks exist in the first wall, the second wall, and the filling material, water can flow out from the cracks to the outer surface of the first or second wall, thereby detecting whether cracks have occurred in the main body. After confirming that cracks have occurred in the main body, the grouting pipe is switched to connect with the grouting tank, thereby injecting grout into the cracks in the main body and repairing the cracks. Therefore, compared with traditional technology, the repair component added in this application can promptly detect and repair potential cracks in the main body of the permanent sealing wall, preventing the cracks from continuing to expand and the sealing effect of the permanent sealing wall from failing.

[0028] Furthermore, such as Figure 1 As shown, the repair component 2 also includes an exhaust pipe 23, one end of which is connected to the partition space, and the other end extends through the bottom of the first wall 11 or the second wall 12.

[0029] It should be noted that when water or repair grout is introduced into the interstitial space, the air that was originally present in the crack will be squeezed out. The squeezed-out air will flow to the bottom of the first wall 11 or the second wall 12 under the drive of the water or grout, and then be discharged through the exhaust pipe 23.

[0030] Understandably, when the repair grout is introduced into the crack of the main body 1, if the grout starts to flow out of the vent pipe 23, it means that the crack of the main body 1 is filled with grout. At this time, the input of grout into the grout delivery pipe 22 can be stopped, and the repair work of the permanent sealing wall can be completed.

[0031] Furthermore, such as Figure 1 As shown, the water supply tank 211 is equipped with a pressure gauge 213, which can observe the pressure value of the water flowing into the slurry pipe 22 from the water supply tank 211.

[0032] It should be noted that when the main body 1 does not develop cracks, the water flow in the grout delivery pipe 22 does not move. At this time, if the water supply tank 211 continues to supply water to the grout delivery pipe 22, the liquid pressure in the grout delivery pipe 22 will continue to increase. The pressure gauge 213 can display the pressure change of the grout delivery pipe 22 at any time, thereby enabling timely judgment on whether the main body 1 has developed cracks and improving the applicability of the repair component.

[0033] Furthermore, the liquid in the slurry supply tank 212 is either fly ash slurry or expanded mortar.

[0034] It should be noted that fly ash slurry is prone to segregation. The water after segregation is discharged spontaneously from the cracks, while the segregated fly ash remains in the cracks and seals them, thereby completing the repair of the cracks in the main body 1. Optionally, deformable materials, such as rubber particles, can be added to the fly ash slurry to optimize the repair effect of the cracks in the main body 1 and improve the repair quality of the cracks in the main body 1.

[0035] It is understandable that the fly ash slurry should be injected into the cracks of the main body 1 in stages. By injecting, separating, and draining the fly ash slurry in batches, the quality of crack repair can be improved.

[0036] It should be noted that the expanding mortar can spontaneously deform within the cracks of the main body 1, thereby filling the cracks and improving the quality of crack repair.

[0037] Furthermore, such as Figure 1 As shown, a stirrer (not shown) is provided in the grout supply tank 212. The stirrer can periodically stir the liquid in the grout supply tank 212, thereby ensuring that the liquid in the grout supply tank 212 does not solidify and improving the uniformity of the grout input into the crack.

[0038] Furthermore, the grout supply tank 212 is connected to the grout delivery pipe 22 via a pneumatic grouting pump (not shown).

[0039] Understandably, the pneumatic grouting pump can inject high-pressure grout into the cracks of the main body 1 to ensure that the grout in the grouting tank 212 has sufficient power to reach the cracks in various parts of the main body 1.

[0040] Furthermore, the repairable underground permanent sealing wall also includes a monitoring component (not shown), which includes a camera, a data processing module, and an alarm. The camera can collect image information of the outer surfaces of the first wall 11 and the second wall 12 and transmit it to the data processing module. When the image information is abnormal, the data processing module can control the alarm to sound an alarm.

[0041] Understandably, when the repair component 2 periodically detects cracks in the main body 1, the data processing module can compare the real-time wall image recorded by the camera with the image of the wall without water seepage, thereby achieving remote and automated determination of whether there are cracks in the main body 1. When there are cracks in the main body 1, the data processing module can also control the early warning device to issue an alarm and repair the cracks in time, thus improving the automation level of the repair component 2.

[0042] Furthermore, both the water supply tank 211 and the slurry supply tank 212 are connected to the slurry delivery pipe 22 via an electric valve 214. The electric valve 214 is electrically connected to the data processing module, which can control the opening and closing of the electric valve 214.

[0043] In other words, when a crack is found in the main body 1, the data processing module can automatically switch the grout delivery pipe 22 to connect with the grout supply tank 212, so as to fill the crack with grout in time for repair, thereby improving the convenience of using the repair component 2.

[0044] Furthermore, such as Figure 1 As shown, the repairable underground permanent sealing wall also includes an anchor 3, which includes a tension rod 31 and nuts 32 connected to both ends of the tension rod 31. The tension rod 31 passes through the first wall 11 and the second wall 12 in sequence, and the nuts 32 abut against the outer surfaces of the first wall 11 and the second wall 12.

[0045] It is understandable that the first wall 11 and the second wall 12 are connected as a whole by the anchor 3, thereby strengthening the structural stability of the main body 1 of the repairable underground permanent sealing wall.

[0046] Furthermore, such as Figure 1 As shown, there are multiple anchors 3, which are arranged at intervals along the height direction.

[0047] Understandably, multiple anchors 3 can improve the tightness of the connection between the first wall 11 and the second wall 12, while ensuring the uniformity of the force on the main body 1, and avoiding structural damage to the main body 1 due to stress concentration.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A repairable permanent sealing wall for underground wells, characterized in that, include: The main body includes a first wall, a second wall, and a filler. The first wall and the second wall are spaced apart in the alleyway, and both the first wall and the second wall separate the alleyway. The filler is located in the space between the first wall and the second wall. The repair component includes a grout supply station, a grout delivery pipe, and an exhaust pipe. One end of the exhaust pipe is connected to the partition space, and the other end extends through the bottom of the first wall or the second wall. The grout supply station includes a water supply tank and a grout supply tank. One end of the grout delivery pipe is connected to the water supply tank, and the other end extends through the top of the first wall or the second wall and connects to the partition space to supply water to the partition space. After water seeps out from the outer surface of the first wall or the second wall, the detection of whether cracks have occurred in the first wall or the second wall is completed; determining the first... After cracks appear in the wall or the second wall, the grout delivery pipe is disconnected from the water supply tank and connected to the grout supply tank to inject grout into the space for repair. The water supply tank is equipped with a pressure gauge, which can observe the pressure value of the water flowing into the grout delivery pipe. When there are no cracks in the main body, the water in the grout delivery pipe does not move. At this time, if the water supply tank continues to input water into the grout delivery pipe, the liquid pressure in the grout delivery pipe will continuously increase. The pressure gauge can display the pressure change of the grout delivery pipe at any time to determine whether the main body has cracked.

2. The repairable permanent sealing wall for downhole mines according to claim 1, characterized in that, The liquid in the slurry supply tank is either fly ash slurry or expanding mortar.

3. The repairable permanent sealing wall for downhole drilling according to claim 2, characterized in that, The slurry supply tank is equipped with a stirrer, which can periodically stir the liquid in the slurry supply tank.

4. The repairable permanent sealing wall for downhole mines according to claim 2, characterized in that, The grout supply tank is connected to the grout delivery pipe via a pneumatic grouting pump.

5. The repairable permanent sealing wall for downhole drilling according to claim 1, characterized in that, It also includes a monitoring component, which includes a camera, a data processing module, and an alarm. The camera can collect image information of the outer surfaces of the first wall and the second wall and transmit it to the data processing module. When the image information is abnormal, the data processing module can control the alarm to sound an alarm.

6. The repairable permanent sealing wall for downhole drilling according to claim 5, characterized in that, Both the water supply tank and the slurry supply tank are connected to the slurry delivery pipe via electric valves. The electric valves are electrically connected to the data processing module, which can control the opening and closing of the electric valves.

7. The repairable permanent sealing wall for downhole mines according to claim 1, characterized in that, It also includes anchors, which include tension rods and nuts connected to both ends of the tension rods. The tension rods pass through the first wall and the second wall in sequence, and the nuts abut against the outer surfaces of the first wall and the second wall.

8. The repairable permanent sealing wall for downhole mines according to claim 7, characterized in that, The anchor has multiple members, which are arranged at intervals along the height direction.

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