A device and method for plugging water inrush from the shaft wall of a vertical shaft

Abstract

The present invention discloses a device and method for plugging water inrush in a vertical shaft shaft wall, which relates to the technical field of mine construction engineering. It 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. The device and method for plugging water inrush in a vertical shaft shaft wall disclosed by the present invention overcome the defects of the prior art by setting a support structure, a flexible bladder, an annular grouting pipe and adopting a large-fluidity non-dispersive slightly expanding high-strength grouting material, plug the water seepage channels of the original shaft wall, and add a water-blocking structure on the inner surface of the vertical shaft shaft wall. This water-blocking structure has reliable water sealing by itself and can plug the water outlet points on the original shaft wall, significantly improving the water sealing performance of the shaft wall.

Description

Technical Field

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

[0002] Local water gushing from the shaft wall in water-bearing strata is a common shaft disease in the current mine production process in China. When the water gushing 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 gushing 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 overburden 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 positions and grouting pressures, the grouting water plugging effects are mostly unsatisfactory. At this time, channel steel shaft rings are 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 water gushing from the shaft wall, it is difficult to fill it densely with materials such as fine aggregate concrete, and the strength of the materials is also difficult to guarantee. The shaft rings are erected in sections, and the overall stiffness is small. Therefore, the shaft rings have limited effect on improving the bearing capacity of the shaft wall, and the grouting pressure is still limited. In addition, the shaft rings themselves do 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 rings and then grouting.

[0004] Therefore, it is necessary to provide a device and method for plugging local water gushing from the shaft wall of a vertical shaft and improving the water sealing performance of the shaft wall. Summary of the Invention

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

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A device for plugging water gushing from the shaft wall of a vertical shaft includes a support structure, the support structure is connected to the inner side of the water gushing 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.

[0008] 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 gushing section of the vertical 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 wall.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] A method for plugging water gushing in the shaft wall includes the following steps:

[0014] 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;

[0015] S2: Use the support structure to provide a reaction force and inject water into the flexible bladder from bottom to top;

[0016] 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 voids and cracks in the shaft wall. After the filling is completed, temporarily plug the second grouting joints at both ends of the annular grouting pipe;

[0017] S4: Grout under pressure in the flexible bladder to 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;

[0018] 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.

[0019] 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.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By setting up a support structure, a flexible bladder, and an annular grouting pipe, and by using a high-strength, non-dispersible, micro-expansive grouting material with high fluidity, the defects of the existing technology are overcome, the water seepage channels of the original shaft wall are blocked, and a water-blocking structure is added to the inner surface of the vertical shaft wall. This water-blocking structure has reliable water sealing by itself and can block the water outlet points on the original shaft wall. The effect of blocking shaft wall water inflow is reliable, significantly improving the water sealing performance of the shaft wall.

[0022] 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. Brief Description of the Drawings

[0023] Figure 1 It is a partial single-layer blocking schematic diagram of a vertical shaft wall water inflow blocking device of the present invention.

[0024] Figure 2 It is Figure 1 the A1-A1 cross-sectional view of

[0025] Figure 3 It is Figure 1 the B1-B1 cross-sectional view of

[0026] Figure 4 It is an overall single-layer blocking schematic diagram of a vertical shaft wall water inflow blocking device of the present invention.

[0027] Figure 5 It is Figure 4 the A2-A2 cross-sectional view of

[0028] Figure 6 It is Figure 4 the B2-B2 cross-sectional view of

[0029] Figure 7 It is Figure 4 the D2-D2 cross-sectional view of

[0030] Figure 8 It is a partial multi-layer blocking schematic diagram of a vertical shaft wall water inflow blocking device of the present invention.

[0031] Figure 9 It is Figure 8 the A3-A3 cross-sectional view of

[0032] Figure 10 It is Figure 8 the B3-B3 cross-sectional view of

[0033] Figure 11 It is Figure 8 the C3-C3 cross-sectional view of

[0034] Figure 12 It is an overall multi-layer blocking schematic diagram of a vertical shaft wall water inflow blocking device of the present invention.

[0035] Figure 13 The Figure 12 A4 - A4 cross - sectional view.

[0036] Figure 14 The Figure 12 B4 - B4 cross - sectional view.

[0037] Figure 15 The Figure 12 C4 - C4 cross - sectional view.

[0038] Figure 16 The Figure 12 D4 - D4 cross - sectional view.

[0039] 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 embodiments

[0040] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Embodiment 1

[0042] Combined with Figures 1-16 , the present invention provides a device for plugging water gushing in a vertical shaft wall, including a support structure, the support structure is connected to the inner side of the water gushing 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.

[0043] 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 gushing section of the vertical shaft wall 1 through the anchor bolt 3, and the anchor bolt 3 is used in combination with an anchor plate and fasteners. The upper and lower ends of the steel plate cylinder...

[0044] The support structure forms a reaction structure.

[0045] At least two 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; both ends of the annular grouting pipe 5 are provided with second grouting joints 7, 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.

[0046] The parameters such as the circumferential and vertical quantities, distributions, and dimensions of the anchor bolts 3, flexible capsules 4, and annular grouting pipes 5, as well as the parameters of the steel plate cylinders 21 and end plates 22, all need to be designed according to the actual conditions.

[0047] The material of the flexible capsule 4 is rubber or other materials with greater elasticity. The annular grouting pipe 5 should be a maintainable and reusable grouting pipe (after grouting, flush the pipeline and then grouting can be carried out again).

[0048] The grouting material should have properties such as high strength, no shrinkage or slight expansion after curing, self-leveling, and non-dispersibility underwater. In this embodiment, the material of the grouting or slurry is a large-flow non-dispersible slightly expanding high-strength grouting material, such as existing high-strength grouting materials.

[0049] In some other embodiments, at least two first grouting joints 6 are provided on each flexible capsule 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.

[0050] The water inrush plugging device for the vertical shaft wall 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.

[0051] The technical idea of traditional in-well grouting is to plug the seepage channels from the outside of the shaft wall in the water inrush section. Back 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 relatively 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.

[0052] Embodiment 2

[0053] A method for plugging water inrush in a vertical shaft wall, using a water inrush plugging device for a vertical shaft wall, includes the following steps:

[0054] S1: Install a support structure on the inner surface of the water inrush section of the vertical shaft wall. A flexible capsule and an annular grouting pipe are installed between the support structure and the shaft wall, and the annular grouting pipe can be reused.

[0055] S2: Provide reaction force by using the support structure, inject water into the flexible bladder from bottom to top. After the flexible bladder expands, it can temporarily block the water inrush, reduce the water inrush volume, and lower the water flow velocity, providing favorable conditions for grouting using the annular grouting pipe.

[0056] 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 block the second grouting joints at both ends of the annular grouting pipe.

[0057] S4: Grout under pressure inside the flexible bladder, replace the water inside with grout, and a sealing structure can be formed on the inner side of the shaft wall after curing; the grout is only inside the flexible bladder and is not affected by the water inrush from the shaft wall, and its strength can be guaranteed.

[0058] S5: After all the flexible bladders are grouted, check whether there is still residual water inrush in the blocked section; if there is residual water inrush, 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 for repeated grouting.

[0059] Example 3

[0060] A method for blocking water inrush in the vertical shaft wall, using a device for blocking water inrush in the vertical shaft wall, including the following steps:

[0061] 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.

[0062] 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 using round steel or section steel to fix it to the shaft wall to facilitate the installation of the lowermost support structure.

[0063] S3: Transport the prefabricated device components to the underground in batches, assemble and weld the support structure on the inner surface of the water inrush section of the vertical shaft wall, install bolts synchronously, 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.

[0064] S4: Provide a reaction force using the support structure, inject water into the flexible bladder from bottom to top to expand the flexible bladder, and temporarily reduce the water inrush from the shaft wall.

[0065] 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 shaft wall, and the fissures; after completion, flush the pipeline, and temporarily block the second grouting joints at both ends of the annular grouting pipe after flushing for subsequent use.

[0066] S6: Maintain the pressure in the flexible bladder from dropping, perform pressure grouting, inject grout to displace the water in the flexible bladder, so that the flexible bladder is filled with grout, and a sealing structure can be formed on the inner side of the shaft wall after the grout solidifies to seal the grouting joints of the flexible bladder.

[0067] S7: After grouting of all flexible bladders is completed, check whether there is still residual water inrush in the sealed section; if there is residual water inrush, 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 grouting.

[0068] Aiming at the technical defects such as poor integrity of the shaft ring, poor water sealing performance, and unclear grouting effect existing in the current water inrush sealing 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-dispersible slightly expanding high-strength grouting material, seals the water seepage channels of the original shaft wall, and adds a layer of water-blocking structure on its inner surface, achieving the technical effect of reliably sealing the water inrush of the shaft wall and significantly improving the water sealing performance of the shaft wall.

[0069] The above 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 method for plugging water inrush in the shaft wall, characterized in that, An apparatus for plugging water inrush in the shaft wall includes a support structure, which is connected to the inner side of the water inrush section of the shaft wall. A grouting cavity is formed between the support structure and the shaft wall, and an annular grouting pipe and a flexible bag are arranged inside the grouting cavity. 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 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 shaft wall. Second grouting joints are arranged at both ends of the annular grouting pipe, and second reserved holes are arranged on the end plates. The second grouting joints penetrate through the end plates through the second reserved holes. A method for plugging water inrush in the shaft wall includes the following steps: S1: Install a support structure on the inner surface of the water inrush section of the shaft wall, and install a flexible bag and an 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 bag from bottom to top. S3: Use the annular grouting pipe to grout from bottom to top to fill the voids between the flexible bags, the water seepage channels in the voids and 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 under pressure inside the flexible bag to replace the water inside the flexible bag with grout. After curing, a plugging structure can be formed on the inner side of the shaft wall. S5: After grouting of all flexible bags is completed, check whether there is still residual water inrush in the plugging section. If there is residual water inrush, 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 to repeat grouting.

2. The method for plugging water inrush from the vertical shaft wall according to claim 1, characterized in that, At least two first grouting joints are arranged on each flexible bag, and first reserved holes for the first grouting joints to pass through are arranged on the steel plate cylinder. The first grouting joints penetrate through the steel plate cylinder through the first reserved holes.

3. The method for sealing water inrush in the vertical shaft wall according to claim 1, characterized in that, At least two first grouting joints are arranged on each flexible bag, and first grouting liquid heads are arranged on the steel plate cylinder. The first grouting joints are connected to the first grouting liquid heads.

4. The method for plugging water inrush from the vertical shaft wall according to claim 1, characterized in that, Second grouting joints are arranged at both ends of the annular grouting pipe, and second grouting liquid heads are arranged on the end plates. The second grouting joints are connected to the second grouting liquid heads.

5. The method for plugging water inrush from the shaft wall according to claim 1, characterized in that, In step S3, after 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 flushing is completed.

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