Grouting device for mine geological disaster control

Abstract

The invention provides a grouting device for mine geological disaster control, and belongs to the technical field of grouting devices, the grouting device for mine geological disaster control comprises a grouting unit, and is characterized in that the grouting unit is provided with a flow stopping assembly, the flow stopping assembly is fixed to a rock mass through a fixing structure, and when the grouting unit is pulled out of a grouting hole, the flow stopping assembly is fixed to the rock mass through the fixing structure. The flow stopping assembly can stop grout in the grouting hole from flowing out of the inlet, the flow stopping assembly comprises a flow stopping ring and flow stopping cloth, the flow stopping cloth is in an annular barrel shape, one end of the flow stopping cloth is fixed between the flow stopping ring and a fixing structure through the fixing structure, and the other end of the flow stopping cloth is provided with an equal-diameter section with the diameter equal to that of the grouting unit; according to the device, the grouting unit can be pulled out of the grouting hole after grouting is completed, the grouting unit is recycled, the cost is reduced, meanwhile, the purpose of blocking the grouting hole is achieved, grout is prevented from flowing out of the grouting hole, and grout waste is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting devices, and in particular relates to a grouting device for treating geological disasters in mines. Background Art

[0002] Grouting into rock cracks is an important means of dealing with poor geology and improving the stability of tunnel surrounding rock. During grouting, a rock drill is usually used to make holes, and fluid mortar is injected through anchor rods (grouting pipes). The stability of the support structure is improved through diffusion consolidation.

[0003] A Chinese patent with the authorization announcement number CN113982653B discloses a tunnel fissure rock mass grouting water blocking device and method, including a grouting pipe, two positioning rings are coaxially slidably installed on the outer surface of the grouting pipe, a plurality of positioning cylinders are fixedly installed on the outer surface of the end where the two positioning rings are close to each other, a positioning ball is slidably installed inside each positioning cylinder, a telescopic sleeve is coaxially fixedly connected between the side surfaces where the two positioning rings are close to each other, a partition airbag is coaxially fixedly installed on the outer surface of the end where the two positioning rings are far away from each other, a cylindrical grouting nozzle is coaxially connected to the right end of the grouting pipe, a bolt plate is coaxially connected to the outer surface of the grouting nozzle, the bolt plate is fixedly installed on the side of the rock mass by bolts, and a grouting inlet pipe is connected to the right end of the grouting nozzle. The present invention lifts the grouting pipe by a plurality of positioning balls and is always in the middle of the grouting hole, so that a plurality of grouting holes can flow out slurry for filling.

[0004] Although the above technical solution achieves the purpose of preventing the slurry from flowing out from the grouting hole when the slurry is filled, the grouting pipe cannot be disassembled after grouting the grouting hole. The grouting pipe remains inside the rock mass as the slurry solidifies, which is not conducive to the reuse of the grouting pipe. For a relatively large-scale project, the loss of grouting pipes is innumerable, which is not conducive to cost reduction. Summary of the invention

[0005] The purpose of the present invention is to provide a grouting device for mine geological disaster management, aiming to solve the problem that the tunnel fissure rock grouting water blocking device and method in the prior art can achieve the purpose of preventing slurry from flowing out from the grouting orifice when the slurry is full, and at the same time, the grouting pipe cannot be reused, resulting in waste of grouting pipes, which is not conducive to cost savings.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grouting device for mine geological disaster management, comprising: a grouting unit, characterized in that a flow stop component is arranged on the grouting unit, and the flow stop component is fixed on the rock mass through a fixed structure. When the grouting unit is pulled out from the grouting hole, the flow stop component can prevent the slurry in the grouting hole from flowing out from the entrance. The flow stop component comprises a flow stop ring and a flow stop cloth. The flow stop cloth is in the shape of an annular cylinder, one end of which is fixed between the flow stop ring and the fixed structure through a fixed structure, and the other end is provided with an equal-diameter section with the same diameter as the grouting unit. Two spring plates with one end contacting each other are symmetrically arranged on the flow stop ring, and the flow stop cloth is arranged on the spring plates. When the grouting unit enters the grouting hole, the grouting unit can push the two spring plates into the interior of the grouting hole and pass through the equal-diameter section into the interior of the grouting hole.

[0007] A further technical solution of the present invention is that the grouting unit comprises an inner cylinder and an outer cylinder, the end of the outer cylinder away from the flow stop assembly is in a cone shape, and a second slurry outlet hole is arranged at the top, the inner cylinder is sleeved inside the outer cylinder, and the end of the inner cylinder close to the cone surface is open and communicated with the interior of the outer cylinder, the first slurry outlet hole is opened on both the inner cylinder and the outer cylinder, a slide groove is arranged on the inner wall of the outer cylinder along its length direction, and a slider that can slide in the slide groove is arranged on the outer wall of the inner cylinder, when the slider slides to the end away from the flow stop assembly, the first slurry outlet holes overlap, and when the slider slides to the end close to the flow stop assembly, the two first slurry outlet holes will be staggered with each other.

[0008] A further technical solution of the present invention is that the fixing structure includes a flange, a positioning plate and a fixing part, the flange is fixedly installed at the entrance end of the grouting hole, the stop ring is located between the flange and the rock mass, the stop cloth is located in the gap between the stop ring and the flange, and can clamp the end of the stop cloth away from the equal diameter section, the positioning plate is threadedly connected to one end of the outer tube and abuts against one side of the stop ring, a stop block is provided at one end of the inner tube, the fixing part is threadedly connected to the flange, and a retaining ring is provided on the fixing part, and when the fixing part is threadedly connected to the external thread, the retaining ring can tightly abut against the stop block.

[0009] A further technical solution of the present invention is that the stop ring is provided with a positioning platform and a fixing platform, the positioning platform is sleeved in the inner diameter of the flange, the fixing platform is located between the flange and the rock mass, and the stop cloth is also clamped between the flange and the fixing platform and between the flange and the positioning platform.

[0010] A further technical solution of the present invention is that the flow-stopping cloth comprises two anti-wear layers and two waterproof layers, wherein the two anti-wear layers are located on the outside and the two waterproof layers are located between the two anti-wear layers.

[0011] A further technical solution of the present invention is that the spring plate is located between two waterproof layer sandwich layers.

[0012] A further technical solution of the present invention is that one end of the spring plate away from the stop ring is arranged in an upward shape.

[0013] A further technical solution of the present invention is that the anti-wear layer is nylon cloth, and the waterproof layer is waterproof canvas.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The device can extract the grouting unit from the grouting hole after grouting is completed, reuse the grouting unit, reduce costs, and also seal the grouting hole to prevent slurry from flowing out of the grouting hole and avoid slurry waste.

[0015] 2. By setting the grouting unit structure, when the grouting unit is drawn out from the grouting hole, the slurry inside the first slurry outlet hole is prevented from flowing out, thereby avoiding the waste of slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention; Figure 2 It is an axonometric cross-sectional view of a specific embodiment of the present invention; Figure 3 for Figure 2 A is an enlarged schematic diagram of the structure; Figure 4 It is a structural schematic diagram of a stop ring in a specific embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the outer cylinder and the inner cylinder in a specific embodiment of the present invention; Figure 6 It is a structural schematic diagram of the flow-stopping cloth in a specific embodiment of the present invention; Figure 7 It is a structural schematic diagram of a flow stop assembly in a specific embodiment of the present invention; Figure 8 It is a simple structural diagram of traditional one-way valve technology.

[0017] In the figure: 1. grouting unit; 11. inner tube; 112. slider; 113. stop block; 12. outer tube; 121. slide groove; 13. first slurry outlet hole; 14. second slurry outlet hole; 2. flow-stopping assembly; 21. flow-stopping ring; 211. spring plate; 212. positioning platform; 213. fixing platform; 22. flow-stopping cloth; 221. flared end; 222. contracted end; 223. equal-diameter section; 224. anti-wear layer; 225. waterproof layer; 3. fixing structure; 31. flange; 311. external thread; 32. positioning plate; 33. fixing piece; 331. retaining ring; 4. rock mass; 5. grouting hole; 6. slurry inlet pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 8 , the present invention provides the following technical solutions: a grouting device for treating geological disasters in mines, comprising a grouting unit 1, a flow-stopping component 2 and a fixing structure 3; The grouting unit 1 can be smoothly inserted into the grouting hole 5 pre-drilled in the rock mass 4, and grouting can be performed in the hole. The flow stop assembly 2 is firmly mounted on the rock mass 4 through the fixing structure 3, and its position is just at the entrance of the grouting hole 5. When the grouting unit 1 completes the grouting task and is withdrawn from the grouting hole 5, the flow stop assembly 2 can effectively prevent the slurry in the grouting hole 5 from flowing out from the entrance.

[0020] The grouting unit 1 is designed as a tubular structure, and its specific length can be adjusted according to the actual position and depth of the crack. At one end of the grouting unit 1, a grouting pipe 6 is connected, and the two can be tightly combined by threaded connection or snap-on fixing. The grouting pipe 6 serves as a conveying channel for the slurry, and smoothly introduces the slurry into the grouting unit 1. Subsequently, the slurry is accurately injected into the grouting hole 5 through the grouting unit 1.

[0021] See also Figure 3 , Figure 4 and Figure 7 The flow stop assembly 2 is composed of a flow stop ring 21 and a flow stop cloth 22. The flow stop cloth 22 is designed in an annular cylindrical shape, with a flared end 221 and a contracted end 222. At the contracted end 222, a section of equal diameter 223 extending in the same direction as the grouting unit 1 is extended, and its diameter just matches the diameter of the grouting unit 1. The flared end 221 is tightly clamped between the flow stop ring 21 and the fixed structure 3 through the fixed structure 3, achieving a firm connection.

[0022] The flow-stopping cloth 22 is composed of two anti-wear layers 224 and two waterproof layers 225. The anti-wear layer 224 is nylon cloth, and the waterproof layer 225 is waterproof canvas. The two anti-wear layers 224 are located on the outside, and the two waterproof layers 225 are sandwiched between the two anti-wear layers 224. The anti-wear layer 224 and the waterproof layer 225 are closely connected by an adhesive. The anti-wear layer 224 not only enhances the overall strength of the flow-stopping cloth 22, but also further effectively protects the internal waterproof layer 225.

[0023] Two spring plates 211 are symmetrically arranged on the stop ring 21, and one end of each of the spring plates 211 is integrally formed with the stop ring 21, and the structure is compact. In a natural state, the other ends of the two spring plates 211 are in contact with each other. The spring plates 211 penetrate between the two layers of waterproof layers 225. Thanks to this design, the equal-diameter section 223 of the stop cloth 22 can remain closed in a natural state, effectively preventing slurry leakage.

[0024] When in use, first, the stopper assembly 2 is firmly mounted at the entrance of the grouting hole 5 through the fixing structure 3. Then, the grouting unit 1 passes through the middle of the stopper cloth 22 and enters the interior of the grouting hole 5. This action causes the grouting unit 1 to abut against the two spring plates 211, so that the two spring plates 211 are automatically opened. At the same time, the equal diameter section 223 of the stopper cloth 22 is tightly fitted on the outer surface of the grouting unit 1, and then the grouting unit 1 is fixed. Afterwards, the slurry is slowly injected into the grouting hole 5 through the grouting unit 1. When the slurry fills the grouting hole 5, the stopper cloth 22 is tightly fitted with the grouting unit 1, and the spring plate 211 provides solid support for the stopper cloth 22, so the slurry is effectively prevented from flowing out of the grouting hole 5. At the same time, the supporting effect of the spring plate 211 also ensures that the stopper cloth 22 will not turn out from the gap between the grouting unit 1 and the stopper ring 21, thereby significantly improving the sealing effect.

[0025] When the grouting unit 1 needs to be pulled out, the stop cloth 22 will rely on the spring plate 211 to move smoothly on the outer surface of the grouting unit 1. When the stop cloth 22 slides to the conical end of the grouting unit 1, due to the pressure of the slurry in the grouting hole 5, the stop cloth 22 will fit tightly on the conical surface. As the stop cloth 22 gradually detaches from the conical surface, the gap between them will gradually shrink. This design can minimize the slurry leakage that may be caused by the grouting unit 1 at the moment of withdrawal. In addition, the spring plate 211 not only supports the stop cloth 22 to prevent it from turning out of the grouting hole 5, but also assists the equal-diameter section 223 of the stop cloth 22 to close. In contrast, in some traditional one-way valve technologies (such as Figure 8 As shown in the figure, when the valve body passes through the conical surface, a gap a is often generated, which can easily lead to slurry leakage. However, this solution effectively avoids the occurrence of this series of problems.

[0026] In addition, after the slurry solidifies, the flow-stopping assembly 2 needs to be removed. Since the flow-stopping cloth 22 may be tightly adhered to the solidified slurry and difficult to be directly removed, when removing the flow-stopping ring 21, a blade can be used to cut the flow-stopping cloth 22 at the connection of the spring plate 211 so that the spring plate 211 can be smoothly separated from the flow-stopping cloth 22. In this way, the spring plate 211 can be reused, thereby effectively reducing the cost.

[0027] See also Figure 2 and Figure 3 The fixing structure 3 mainly includes a flange 31, which is firmly mounted on the entrance end of the grouting hole 5 by screws. Before performing this installation operation, a threaded hole needs to be processed in advance at the entrance of the grouting hole 5 so that the screws can smoothly fix the flange 31 on the rock mass 4. The stop ring 21 is integrally designed with a positioning platform 212 and a fixing platform 213. The positioning platform 212 is in the shape of a circular ring and is sleeved in the inner diameter of the flange 31; the stop cloth 22 can be tightly clamped in the gap between the positioning platform 212 and the inner diameter of the flange 31. The fixing platform 213 is located between the flange 31 and the rock mass 4. Similarly, the stop cloth 22 is also firmly clamped between the flange 31 and the fixing platform 213. Such a design not only effectively prevents the leakage of slurry, but also significantly improves the sealing performance of the stop cloth 22.

[0028] See also Figure 5 The grouting unit 1 is composed of two inner and outer cylinders, namely, an inner cylinder 11 and an outer cylinder 12. The inner cylinder 11 is sleeved inside the outer cylinder 12. A slide groove 121 is provided on the inner wall of the outer cylinder 12 along its length direction; and a slider 112 that can slide freely in the slide groove 121 is provided on the outer wall of the inner cylinder 11. Such a design ensures that the inner cylinder 11 can only slide inside the outer cylinder 12.

[0029] The first slurry outlet holes 13 are provided on both the inner cylinder 11 and the outer cylinder 12. When the slider 112 slides to the end close to the conical surface of the outer cylinder 12, the two first slurry outlet holes 13 will coincide with each other, and at this time, the slurry can be smoothly injected into the grouting hole 5. When the slider 112 slides to the end away from the conical surface, the two first slurry outlet holes 13 will stagger with each other, thereby effectively preventing the slurry from flowing out of the first slurry outlet holes 13.

[0030] It is worth mentioning that the end of the inner tube 11 close to the conical surface is designed to be open, so that the interior of the inner tube 11 is connected to the outside (i.e., the interior of the outer tube 12). In addition, a second slurry outlet hole 14 is provided at the conical surface of the outer tube 12. The second slurry outlet hole 14 is located at the top of the conical surface and is connected to the internal space of the outer tube 12, so that the slurry can smoothly enter the interior of the grouting hole 5 through the second slurry outlet hole 14 at the same time.

[0031] In the process of pouring slurry into the grouting hole 5, the slurry is introduced into the inner tube 11 through the slurry inlet pipe 6. Subsequently, the slurry flows into the grouting hole 5 through the first slurry outlet hole 13 and the second slurry outlet hole 14. When the grouting hole 5 is filled with slurry, the grouting unit 1 needs to be pulled out from the grouting hole 5. However, since the grouting unit 1 itself also occupies a part of the space of the grouting hole 5, the inside of the grouting hole 5 will not be completely filled with slurry after it is completely pulled out. In order to ensure that the grouting hole 5 always remains filled, we need to continue to inject slurry into the grouting hole 5 while pulling out the grouting unit 1.

[0032] Considering that there are multiple first slurry outlet holes 13 distributed on the outer surface of the grouting unit 1, once part of the first slurry outlet holes 13 are exposed outside the grouting hole 5, the slurry may leak out from these holes. To avoid this situation, we stagger the first slurry outlet holes 13 on the inner tube 11 and the outer tube 12 during the process of extracting the grouting unit 1, so as to close the first slurry outlet holes 13 and ensure that the slurry is only discharged from the second slurry outlet holes 14, thereby effectively preventing the slurry from leaking from the first slurry outlet holes 13 to the outside of the grouting hole 5. When the second slurry outlet hole 14 is about to completely detach from the grouting hole 5, stop supplying slurry to the inside of the grouting unit 1 in time to prevent the slurry from leaking from the second slurry outlet holes 14.

[0033] See also Figure 2 In order to achieve a stable fixation of the grouting unit 1 and ensure that the first grouting holes 13 on the inner cylinder 11 and the outer cylinder 12 can overlap or stagger as needed, a fixing structure 3 is used. The structure also includes a positioning plate 32 and a fixing member 33.

[0034] Specifically, the positioning plate 32 is tightly connected to one end of the outer cylinder 12 close to the pulp inlet pipe 6 through threads. Subsequently, the positioning plate 32 is installed in the central position of the flange 31 so that one side thereof abuts against the positioning platform 212, thereby achieving a stable positioning effect.

[0035] An annular integrated stopper 113 is provided at one end of the inner cylinder 11 near the pulp inlet pipe 6, which is integrated with the inner cylinder 11 and has a solid structure. On one side of the flange 31, an external thread 311 is designed so as to be threadedly connected with the fixing member 33.

[0036] A retaining ring 331 is specially provided on the fixing member 33. When the fixing member 33 is threadedly connected to the external thread 311, the retaining ring 331 will tightly abut against the stopper 113. With this design, the fastening force of the fixing member 33 can be used to push the inner cylinder 11 to slide toward the end of the outer cylinder 12 with the conical surface through the stopper 113 until the first pulp outlet holes 13 on the inner cylinder 11 and the outer cylinder 12 overlap.

[0037] At this time, the slurry can be smoothly injected into the grouting hole 5 through the first grouting hole 13 to perform the grouting operation. At the same time, the fixing member 33 firmly presses the positioning plate 32 against the positioning platform 212, ensuring that the axis positioning of the grouting unit 1 is accurate. This design allows the grouting unit 1 to remain in a tilted state inside the grouting hole 5, effectively avoiding the problem of part of the first grouting hole 13 being blocked due to the contact between the grouting unit 1 and the inner wall of the grouting hole 5.

[0038] When the grouting hole 5 is filled with slurry and the grouting unit 1 needs to be pulled out, it is only necessary to first unscrew the fixing member 33 to release its limiting effect on the stop block 113. Subsequently, the pressure inside the grouting unit 1 will push the inner cylinder 11 and the outer cylinder 12 to move relative to each other, so that the first slurry outlet holes 13 on the inner cylinder 11 and the outer cylinder 12 are staggered. In this way, when the grouting unit 1 is pulled out, the slurry inside it can be effectively prevented from leaking from the first slurry outlet hole 13, thereby reducing the occurrence of waste.

[0039] In another embodiment, the end of the spring plate 211 away from the stop ring 21 is arranged in an upward shape, which can prevent the end of the spring plate 211 from getting caught on the first slurry outlet hole 13, causing the grouting unit 1 to be difficult to pull out. Of course, setting a rounded corner on the spring plate 211 can also achieve this purpose. In this solution, it is not limited to the upward shape.

Claims

1. A grouting device for controlling geological disasters in mines, comprising: The grouting unit (1) is characterized in that a flow-stopping assembly (2) is provided on the grouting unit (1), and the flow-stopping assembly (2) is fixed to the rock mass (4) via a fixing structure (3). When the grouting unit (1) is drawn out of the grouting hole (5), the flow-stopping assembly (2) can prevent the slurry in the grouting hole (5) from flowing out from the inlet. The flow-stopping assembly (2) comprises a flow-stopping ring (21) and a flow-stopping cloth (22). The flow-stopping cloth (22) is in the shape of an annular cylinder, and one end of the flow-stopping cloth (22) is fixed to the flow-stopping ring (21) via the fixing structure (3). 1) and a fixed structure (3), and an equal-diameter section (223) having the same diameter as the grouting unit (1) is arranged at the other end; two spring plates (211) whose one ends are in contact with each other are symmetrically arranged on the stop ring (21); the stop cloth (22) is arranged on the spring plates (211); when the grouting unit (1) enters the grouting hole (5), the grouting unit (1) can push the two spring plates (211) into the interior of the grouting hole (5) and pass through the equal-diameter section (223) to enter the interior of the grouting hole (5).

2. A grouting device for treating geological disasters in mines according to claim 1, characterized in that: The grouting unit (1) comprises an inner tube (11) and an outer tube (12); the end of the outer tube (12) away from the flow-stopping assembly (2) is in a conical shape, and a second slurry outlet hole (14) is arranged at the top; the inner tube (11) is sleeved inside the outer tube (12); the end of the inner tube (11) close to the conical surface is open and communicates with the inside of the outer tube (12); the first slurry outlet hole (13) is provided on both the inner tube (11) and the outer tube (12); a slide groove (121) is provided on the inner wall of the outer tube (12) along its length direction; a slider (112) capable of sliding in the slide groove (121) is provided on the outer wall of the inner tube (11); when the slider (112) slides to the end away from the flow-stopping assembly (2), the first slurry outlet holes (13) overlap; when the slider (112) slides to the end close to the flow-stopping assembly (2), the two first slurry outlet holes (13) are staggered.

3. A grouting device for treating geological disasters in mines according to claim 2, characterized in that: The fixing structure (3) comprises a flange (31), a positioning plate (32) and a fixing member (33); the flange (31) is fixedly mounted at the inlet end of the grouting hole (5); the stop ring (21) is located between the flange (31) and the rock mass (4); the stop cloth (22) is located in the gap between the stop ring (21) and the flange (31) and is capable of clamping an end of the stop cloth (22) away from the equal-diameter section (223); the positioning plate (32) is threadedly connected to one end of the outer cylinder (12) and abuts against one side of the stop ring (21); a stop block (113) is provided at one end of the inner cylinder (11); the fixing member (33) is threadedly connected to the flange (31); a stop ring (331) is provided on the fixing member (33); when the fixing member (33) is threadedly connected to the external thread (311), the stop ring (331) can tightly abut against the stop block (113).

4. A grouting device for treating geological disasters in mines according to claim 3, characterized in that: The stop ring (21) is provided with a positioning platform (212) and a fixing platform (213); the positioning platform (212) is sleeved within the inner diameter of the flange (31); the fixing platform (213) is located between the flange (31) and the rock mass (4); and the stop cloth (22) is also sandwiched between the flange (31) and the fixing platform (213) and between the flange (31) and the positioning platform (212).

5. The grouting device for treating geological disasters in mines according to claim 1, characterized in that: The flow-stopping cloth (22) comprises two anti-wear layers (224) and two waterproof layers (225), wherein the two anti-wear layers (224) are located on the outside, and the two waterproof layers (225) are located between the two anti-wear layers (224).

6. A grouting device for treating geological disasters in mines according to claim 5, characterized in that: The spring plate (211) is located between two waterproof layers (225).

7. The grouting device for treating geological disasters in mines according to claim 1, characterized in that: One end of the spring plate (211) away from the flow-stop ring (21) is arranged in an upwardly tilted shape.

8. The grouting device for treating geological disasters in mines according to claim 5, characterized in that: The anti-wear layer (224) is nylon cloth, and the waterproof layer (225) is waterproof canvas.

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