Vertical shaft wall water gushing plugging device and method

Abstract

The invention discloses a vertical shaft wall water gushing plugging device and method, and relates to the technical field of mine construction engineering. Comprising a supporting structure, the supporting structure is connected to the inner side of a water gushing section of a vertical shaft wall, a grouting cavity is formed between the supporting structure and the vertical shaft wall, and an annular grouting pipe and a flexible bag are arranged in the grouting cavity. According to the vertical shaft wall water gushing plugging device and method, the supporting structure, the flexible bag and the annular grouting pipe are arranged, the large-flow-state non-dispersive micro-expansion high-strength grouting material is adopted, the defects in the prior art are overcome, a water seepage channel of an original shaft wall is plugged, and a layer of water plugging structure is additionally arranged on the inner surface of the vertical shaft wall; the water plugging structure is reliable in self water sealing, can plug a water outlet point on an original well wall, and remarkably improves the water sealing performance of the well wall.

Description

Technical Field

[0001] The present invention relates to the technical field of mine construction engineering, and particularly relates to a vertical shaft shaft wall water inrush plugging device and method. Background Art

[0002] Local water inrush in the shaft wall of vertical shafts in water-bearing strata is a common shaft disease in the current mine production process in China. When the water inrush volume is large, it not only deteriorates the shaft operation environment, accelerates the corrosion of shaft equipment, affects the normal production of the mine, but also poses a hidden danger to the mine safety.

[0003] The usual water inrush treatment technology is grouting in the shaft. For the shaft wall in the bedrock section, behind-the-wall grouting is often used, and for the shaft wall in the surface soil section, inter-wall grouting is often used. When the shaft wall quality and the injectability of the formation are good, grouting in the shaft can often achieve good water plugging effects. However, when the shaft wall quality is poor (such as local cracking or quality defects caused by pouring concrete against water during shaft sinking), due to the limited hole layout position and grouting pressure, the grouting water plugging effect is often not ideal. At this time, a channel steel shaft ring is often erected on the inner side of the shaft wall in order to improve the bearing capacity of the shaft wall, so as to increase the grouting pressure. However, the gap between the shaft ring and the inner surface of the shaft wall is small. Under the condition of shaft wall water inrush, it is difficult to fill and compact with materials such as fine aggregate concrete, and the material strength is also difficult to guarantee. The shaft rings are erected in sections, and the overall stiffness is small. Therefore, the shaft ring has a limited effect on improving the bearing capacity of the shaft wall, and the grouting pressure is still limited. In addition, the shaft ring itself does not seal water and cannot form an overall water seal with the shaft wall. During grouting, slurry leakage is also easy to occur, thus limiting the grouting effect. Therefore, practice shows that it is still difficult to achieve the expected water sealing purpose after erecting the shaft ring and then grouting.

[0004] Therefore, it is necessary to provide a vertical shaft shaft wall water inrush plugging device and method that can plug local shaft wall water inrush and improve the water sealing performance of the shaft wall. Summary of the Invention

[0005] The main purpose of the present invention is to provide a vertical shaft shaft wall water inrush plugging device and method to solve the problems existing in the prior art.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A vertical shaft shaft wall water inrush plugging device includes a support structure, the support structure is connected to the inner side of the water inrush section of the vertical shaft shaft wall, a grouting cavity is formed between the support structure and the vertical shaft shaft wall, and an annular grouting pipe and a flexible bladder are arranged inside the grouting cavity.

[0007] Further, the support structure includes a steel plate cylinder, end plates and anchor bolts. The upper and lower ends of the steel plate cylinder are respectively fixedly connected to the inner side of the water inrush section of the vertical shaft shaft wall through anchor bolts. The upper and lower ends of the steel plate cylinder are both connected with the end plates, and one end of the end plate abuts against the vertical shaft shaft wall.

[0008] Furthermore, at least two first grouting joints are provided on each flexible bladder, a first reserved hole for the first grouting joint to pass through is provided on the steel plate cylinder, and the first grouting joint penetrates through the steel plate cylinder through the first reserved hole.

[0009] Furthermore, at least two first grouting joints are provided on each flexible bladder, a first grouting liquid head is provided on the steel plate cylinder, and the first grouting joint is connected to the first grouting liquid head.

[0010] Furthermore, second grouting joints are provided at both ends of the annular grouting pipe, second reserved holes are provided on the end plate, and the second grouting joint penetrates through the end plate through the second reserved hole.

[0011] Furthermore, second grouting joints are provided at both ends of the annular grouting pipe, a second grouting liquid head is provided on the end plate, and the second grouting joint is connected to the second grouting liquid head.

[0012] A method for plugging water gushing in the shaft wall includes the following steps: S1: Install a support structure on the inner surface of the water gushing section of the shaft wall, and install a flexible bladder and an annular grouting pipe between the support structure and the shaft wall; S2: Use the support structure to provide a reaction force and inject water into the flexible bladder from bottom to top; S3: Use the annular grouting pipe to grout from bottom to top to fill the voids between the flexible bladders, the water seepage channels in the cracks in the shaft wall. After the filling is completed, temporarily plug the second grouting joints at both ends of the annular grouting pipe; S4: Grout while maintaining pressure in the flexible bladder, replace the water in the flexible bladder with grout, and a plugging structure can be formed on the inner side of the shaft wall after curing; S5: After all the flexible bladders are grouted, check whether there is still residual water gushing in the plugging section; if there is residual water gushing, use the annular grouting pipe to grout again; after meeting the design requirements, plug the second grouting joints at both ends of the annular grouting pipe. If new water emergence points are found during subsequent use, the annular grouting pipe can be used for repeated grouting.

[0013] Furthermore, in step S3, after the grouting is completed, flush the annular grouting pipe, and then temporarily plug the second grouting joints at both ends of the annular grouting pipe after the flushing is completed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting up a support structure, a flexible bladder and an annular grouting pipe and using a large-fluidity non-dispersive slightly expanding high-strength grouting material to overcome the defects of the prior art, the water seepage channels of the original shaft wall are plugged, and a water plugging structure is added on the inner surface of the shaft wall of the vertical shaft. The water plugging structure is reliable in water sealing by itself and can plug the water emergence points on the original shaft wall. The effect of plugging water gushing in the shaft wall is reliable, and the water sealing performance of the shaft wall is significantly improved.

[0015] Through the annular grouting pipe, the water seepage channels such as the pores and fissures inside the water blocking structure, between the water blocking structure and the original shaft wall, and inside the original shaft wall are blocked, and the blocking effect is better. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of partial single-layer plugging of a vertical shaft wall water inrush plugging device of the present invention.

[0017] Figure 2 It is Figure 1 The A1-A1 cross-sectional view of

[0018] Figure 3 It is Figure 1 The B1-B1 cross-sectional view of

[0019] Figure 4 It is a schematic diagram of the whole-circle single-layer plugging of a vertical shaft wall water inrush plugging device of the present invention.

[0020] Figure 5 It is Figure 4 The A2-A2 cross-sectional view of

[0021] Figure 6 It is Figure 4 The B2-B2 cross-sectional view of

[0022] Figure 7 It is Figure 4 The D2-D2 cross-sectional view of

[0023] Figure 8 It is a schematic diagram of partial multi-layer plugging of a vertical shaft wall water inrush plugging device of the present invention.

[0024] Figure 9 It is Figure 8 The A3-A3 cross-sectional view of

[0025] Figure 10 It is Figure 8 The B3-B3 cross-sectional view of

[0026] Figure 11 It is Figure 8 The C3-C3 cross-sectional view of

[0027] Figure 12 It is a schematic diagram of the whole-circle multi-layer plugging of a vertical shaft wall water inrush plugging device of the present invention.

[0028] Figure 13 It is Figure 12 The A4-A4 cross-sectional view of

[0029] Figure 14 It is Figure 12 The B4-B4 cross-sectional view of

[0030] Figure 15 is Figure 12 Cross-sectional view C4-C4.

[0031] Figure 16 is Figure 12 Cross-sectional view D4-D4.

[0032] Wherein, 1 - shaft wall; 21 - steel plate cylinder; 22 - end plate; 3 - anchor bolt; 4 - flexible bladder; 5 - annular grouting pipe; 6 - first grouting joint; 7 - second grouting joint. Specific implementation mode

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Embodiment 1

[0035] Combined with Figures 1 - 16 , the present invention provides a water inrush plugging device for a vertical shaft wall, including a support structure, the support structure is connected to the inner side of the water inrush section of the vertical shaft wall 1, a grouting cavity is formed between the support structure and the vertical shaft wall 1, and an annular grouting pipe 5 and a flexible bladder 4 are arranged inside the grouting cavity.

[0036] The support structure includes a steel plate cylinder 21, an end plate 22 and an anchor bolt 3. The upper and lower ends of the steel plate cylinder 21 are respectively fixedly connected to the inner side of the water inrush section of the vertical shaft wall 1 through the anchor bolt 3. The anchor bolt 3 is used in combination with an anchor plate and fasteners. The upper and lower ends of the steel plate cylinder 21 are both connected with the end plate 22, and one end of the end plate 22 abuts against the vertical shaft wall 1.

[0037] The support structure forms a reaction structure.

[0038] At least 2 first grouting joints 6 are arranged on each flexible bladder 4. A first reserved hole for the first grouting joint 6 to pass through is arranged on the steel plate cylinder 21, and the first grouting joint 6 penetrates through the steel plate cylinder 21 through the first reserved hole; second grouting joints 7 are arranged at both ends of the annular grouting pipe 5, and a second reserved hole is arranged on the end plate 22, and the second grouting joint 7 penetrates through the end plate 22 through the second reserved hole; the arrangement of the first grouting joint 6 and the second grouting joint 7 facilitates the grouting operation.

[0039] Parameters such as the number, distribution and size of the anchor bolts 3, flexible bladders 4 and annular grouting pipes 5 in the circumferential and vertical directions, and the parameters of the steel plate cylinder 21 and the end plate 22 need to be designed according to actual conditions.

[0040] The material of the flexible bladder 4 is rubber or other materials with greater elasticity. The annular grouting pipe 5 should be a maintainable and reusable grouting pipe (after grouting, wash the pipeline and then grout again).

[0041] The grouting material should have properties such as high strength, no shrinkage or slight expansion after curing, self-leveling, and non-dispersion underwater. In this embodiment, the material of the grouting or slurry is a highly fluid non-dispersive slightly expanding high-strength grouting material, such as existing high-strength grouting materials.

[0042] In some other embodiments, at least two first grouting joints 6 are provided on each flexible bladder 4, a first grouting liquid head is provided on the steel plate cylinder 21, and the first grouting joint 6 is connected to the first grouting liquid head; second grouting joints 7 are provided at both ends of the annular grouting pipe 5, a second grouting liquid head is provided on the end plate 22, and the second grouting joint 7 is connected to the second grouting liquid head.

[0043] The vertical shaft shaft wall water inrush plugging device in this embodiment can perform single-layer and multi-layer plugging on the local or entire circle inside the shaft wall. Figures 1 - 3 It is a schematic diagram of the local single-layer plugging structure inside the shaft wall. Figures 4 - 7 It is a schematic diagram of the entire-circle single-layer plugging structure inside the shaft wall. Figures 8 - 11 It is a schematic diagram of the local multi-layer plugging structure inside the shaft wall. Figures 12 - 16 It is a schematic diagram of the entire-circle multi-layer plugging structure inside the shaft wall.

[0044] The technical idea of traditional in-shaft grouting is to plug the seepage channels from the outside of the shaft wall in the water inrush section. Backfill grouting is to plug the seepage channels in the formation near the shaft wall, and inter-wall grouting is to plug the interlayer between the inner and outer shaft walls 1. If the quality of the shaft wall in the water inrush section is not high, the pressure needs to be controlled at a low level during grouting to prevent the shaft wall 1 from being damaged. At this time, the slurry is difficult to spread, and the water plugging effect is limited. The technical idea of the present invention is to form a plugging structure inside the shaft wall 1 in the water inrush section and plug the seepage channels inside the shaft wall 1.

[0045] Embodiment 2

[0046] A method for plugging water inrush in a vertical shaft shaft wall, using a device for plugging water inrush in a vertical shaft shaft wall, includes the following steps: S1: Install a support structure on the inner surface of the water inrush section of the vertical shaft shaft wall. A flexible bladder and an annular grouting pipe are installed between the support structure and the shaft wall, and the annular grouting pipe can be reused.

[0047] S2: Use the support structure to provide reaction force, and inject water into the flexible bladder from bottom to top. After the flexible bladder expands, it can temporarily plug the water inrush, reduce the water inrush volume, and lower the water flow velocity, providing favorable conditions for grouting using the annular grouting pipe.

[0048] S3: Use the annular grouting pipe to grout from bottom to top to fill the voids and fissure seepage channels between the flexible bladders and inside the shaft wall. After the filling is completed, temporarily plug the second grouting joints at both ends of the annular grouting pipe.

[0049] S4: Inject grout under pressure inside the flexible bladder, replacing the water inside it with grout. After curing, a sealing structure can be formed on the inner side of the shaft wall. The grout is only inside the flexible bladder and is not affected by the water gushing from the shaft wall, so its strength can be guaranteed.

[0050] S5: After all the flexible bladders are grouted, check whether there is still residual water gushing in the sealed section. If there is residual water gushing, use the annular grouting pipe to grout again. After meeting the design requirements, seal the second grouting joints at both ends of the annular grouting pipe. If new water emergence points are found during subsequent use, the annular grouting pipe can be used to repeat the grouting.

[0051] Example 3

[0052] A method for plugging water gushing in a vertical shaft wall uses a device for plugging water gushing in a vertical shaft wall, including the following steps: S1: Customize flexible bladders according to the design. Each flexible bladder is provided with at least 2 first grouting joints, and the connection between the first grouting joint and the bladder body is sealed. Customize the annular grouting pipe according to the design. Second grouting joints are provided at both ends of the annular grouting pipe, and the connection between the second grouting joint and the pipe body is sealed. Fabricate the support structure (including a steel plate cylinder and end plates). When fabricating, divide it into blocks according to the shaft engineering conditions and construction equipment conditions, and try to reduce the number of blocks to reduce the underground welds. The steel plate cylinder and end plates are welded during fabrication. Design the first reserved holes on the steel plate cylinder for the installation and connection of the first grouting joints of the flexible bladders. Reserve bolt holes on the steel plate cylinder according to the design for bolt installation. Design the second reserved holes on the end plates for the installation and connection of the second grouting joints of the annular grouting pipe.

[0053] S2: Level and clean the inner surface of the shaft wall in the installation section, and install a temporary support for the lower end plate of the support structure, such as fixing round steel or section steel to the shaft wall to facilitate the installation of the lowermost support structure.

[0054] S3: Transport the prefabricated device components to the underground in batches, assemble and weld the support structure on the inner surface of the water gushing section of the vertical shaft wall, install bolts synchronously, and install flexible bladders and annular grouting pipes between the support structure and the shaft wall. Seal the connections between the flexible bladder joints and the steel plate cylinder and between the annular grouting pipe joints and the end plates.

[0055] S4: Use the support structure to provide reaction force, inject water into the flexible bladder from bottom to top to make the flexible bladder expand, temporarily reducing the water gushing from the shaft wall.

[0056] S5: Inject grout into the annular grouting pipe from bottom to top to fill the gaps between the flexible bladders, the water seepage channels in the voids and fissures inside the shaft wall. After completion, flush the pipeline. After the flushing is completed, temporarily seal the second grouting joints at both ends of the annular grouting pipe for subsequent use.

[0057] S6: Maintain the pressure inside the flexible bladder without dropping, perform pressure maintenance grouting, inject grout to displace the water in the flexible bladder, so that the flexible bladder is filled with grout. After the grout solidifies, a plugging structure can be formed on the inner side of the wellbore to plug the grouting joint of the flexible bladder.

[0058] S7: After all the flexible bladders are grouted, check whether there is still residual water gushing in the plugging section; if there is residual water gushing, use the annular grouting pipe to perform grouting again; after meeting the design requirements, plug the second grouting joints at both ends of the annular grouting pipe. If new water emergence points are found during subsequent use, the annular grouting pipe can be used to repeat grouting.

[0059] Aiming at the technical defects such as poor integrity of the well ring, poor water sealing performance and unobvious grouting effect existing in the current water gushing plugging technology, the present invention overcomes the defects of the existing technology by means of technical measures such as setting a support structure, a flexible bladder and an annular grouting pipe, and using a large fluidity non-dispersive slightly expanding high-strength grouting material, plugs the water seepage channels of the original wellbore, and adds a layer of water plugging structure on its inner surface, achieving the technical effect of reliably plugging the water gushing of the wellbore and significantly improving the water sealing performance of the wellbore.

[0060] The above description is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A device for plugging water inrush in the shaft wall of a vertical shaft, characterized in that, It includes a support structure, which is connected to the inner side of the water-inflow section of the vertical shaft wall. A grouting cavity is formed between the support structure and the vertical shaft wall, and an annular grouting pipe and a flexible bladder are arranged inside the grouting cavity.

2. The water inrush plugging device for the vertical shaft shaft wall according to claim 1, characterized in that The support structure includes a steel plate cylinder, end plates and anchor bolts. The upper and lower ends of the steel plate cylinder are respectively fixedly connected to the inner side of the water-inflow section of the vertical shaft wall through anchor bolts. End plates are connected to both the upper and lower ends of the steel plate cylinder, and one end of each end plate abuts against the vertical shaft wall.

3. The water inrush plugging device for the vertical shaft wall according to claim 2, wherein, Each flexible bladder is provided with at least two first grouting joints. The steel plate cylinder is provided with first reserved holes for the first grouting joints to pass through, and the first grouting joints penetrate through the steel plate cylinder through the first reserved holes.

4. The water inrush plugging device for vertical shaft shaft wall according to claim 2, characterized in that, Each flexible bladder is provided with at least two first grouting joints. The steel plate cylinder is provided with first grouting liquid heads, and the first grouting joints are connected to the first grouting liquid heads.

5. The water inrush plugging device for the vertical shaft wall according to claim 2, characterized in that, Both ends of the annular grouting pipe are provided with second grouting joints. The end plates are provided with second reserved holes, and the second grouting joints penetrate through the end plates through the second reserved holes.

6. The water inrush plugging device for the vertical shaft wall according to claim 2, wherein Both ends of the annular grouting pipe are provided with second grouting joints. The end plates are provided with second grouting liquid heads, and the second grouting joints are connected to the second grouting liquid heads.

7. A method for plugging water inrush from the shaft wall, which uses the device for plugging water inrush from the shaft wall described in any one of claims 1-6, is characterized in that It includes the following steps: S1: Install the support structure on the inner surface of the water-inflow section of the vertical shaft wall, and install the flexible bladder and the annular grouting pipe between the support structure and the shaft wall; S2: Use the support structure to provide reaction force and inject water into the flexible bladder from bottom to top; S3: Use the annular grouting pipe to grout from bottom to top to fill the gaps between the flexible bladders, the water seepage channels in the voids and fissures in the shaft wall. After the filling is completed, temporarily block the second grouting joints at both ends of the annular grouting pipe; S4: Grout with pressure maintained inside the flexible bladder, replace the water inside the flexible bladder with grout, and a sealing structure can be formed on the inner side of the shaft wall after curing; S5: After all the flexible bladders are grouted, check whether there is still residual water inflow in the sealed section; if there is residual water inflow, use the annular grouting pipe to grout again; after meeting the design requirements, block the second grouting joints at both ends of the annular grouting pipe. If new water emergence points are found during subsequent use, the annular grouting pipe can be used to repeat the grouting.

8. The method for plugging water inrush in the vertical shaft wall according to claim 7, characterized in that, In step S3, after the grouting is completed, flush the annular grouting pipe, and then temporarily block the second grouting joints at both ends of the annular grouting pipe after the flushing is completed.

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