A grouting device for controlling mine geological disasters

Abstract

The present invention provides a grouting device for mine geological disaster control, belonging to the technical field of grouting devices. The grouting device for mine geological disaster control includes a grouting unit, and is characterized in that a flow stopping component is arranged on the grouting unit. The flow stopping component is fixed on the rock mass through a fixing structure. When the grouting unit is withdrawn from the grouting hole, the flow stopping component can prevent the slurry in the grouting hole from flowing out from the inlet. The flow stopping component includes a flow stopping ring and a flow stopping cloth. The flow stopping cloth is in the shape of an annular cylinder. One end of the flow stopping cloth is fixed between the flow stopping ring and the fixing structure through the fixing structure, and the other end is provided with an equal-diameter section equal to the diameter of the grouting unit. This device can withdraw the grouting unit from the grouting hole after grouting is completed, reuse the grouting unit, reduce costs, and at the same time achieve the purpose of plugging the grouting hole, prevent the slurry from flowing out of the grouting hole, and avoid the waste of slurry.

Description

Technical Field

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

[0002] Grouting into rock fissures 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 drill holes, and fluid mortar is injected through anchor rods (grouting pipes). The mortar is then diffused and consolidated to improve the stability of the support structure.

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

[0004] Although the above technical solution achieves the purpose of preventing the slurry from flowing out of 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 does not allow the slurry to flow out from the grouting orifice when the slurry is full, and the grouting pipe cannot be reused, resulting in waste of the grouting pipe, which is not conducive to cost savings.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a grouting device for controlling geological disasters in mines, comprising: a grouting unit, characterized in that a flow-stop component is provided on the grouting unit, and the flow-stop component is fixed to the rock mass through a fixed structure. When the grouting unit is pulled out of 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 includes a flow-stop ring and a flow-stop cloth. The flow-stop cloth is an annular cylindrical shape, 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 provided on the flow-stop ring, and the flow-stop cloth is provided on the spring plates. When the grouting unit enters the grouting hole, the grouting unit can push the two spring plates toward 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 includes an inner tube and an outer tube, the end of the outer tube away from the flow-stop component is conical, and a second slurry outlet hole is provided at the top, the inner tube is sleeved inside the outer tube, and the end of the inner tube close to the cone surface is open and communicated with the interior of the outer tube, and the first slurry outlet hole is provided on both the inner tube and the outer tube, and a slide groove is provided on the inner wall of the outer tube along its length direction, and a slider that can slide in the slide groove is provided on the outer wall of the inner tube, when the slider slides to the end away from the flow-stop component, the first slurry outlet holes coincide, and when the slider slides to the end close to the flow-stop component, 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 inlet 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. 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 includes 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 layers.

[0012] A further technical solution of the present invention is that one end of the elastic plate away from the flow stop ring is arranged in an upturned 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 beneficial effects of the present invention are as follows:

[0015] 1. The device can extract the grouting unit from the grouting hole after grouting is completed, reuse the grouting unit, reduce costs, and at the same time achieve the purpose of plugging the grouting hole, avoiding the outflow of the grout from the grouting hole and preventing the waste of the grout.

[0016] 2. Through the setting of the structure of the grouting unit, when the grouting unit is extracted from the grouting hole, the outflow of the grout inside the first slurry outlet hole is avoided, preventing the waste of the grout. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The 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, but do not constitute a limitation to the present invention. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a specific embodiment in the present invention;

[0019] Figure 2 is an axonometric sectional view of a specific embodiment in the present invention;

[0020] Figure 3 is Figure 2 a schematic enlarged view of the structure at A in;

[0021] Figure 4 is a schematic structural diagram of the flow stop ring in a specific embodiment in the present invention;

[0022] Figure 5 is a schematic structural diagram of the outer cylinder and the inner cylinder in a specific embodiment in the present invention;

[0023] Figure 6 is a schematic structural diagram of the flow stop cloth in a specific embodiment in the present invention;

[0024] Figure 7 is a schematic structural diagram of the flow stop assembly in a specific embodiment in the present invention;

[0025] Figure 8 is a simple schematic structural diagram of the traditional one-way valve technology.

[0026] In the figure: 1. Grouting unit; 11. Inner cylinder; 112. Slide block; 113. Block; 12. Outer cylinder; 121. Chute; 13. First slurry outlet hole; 14. Second slurry outlet hole; 2. Flow-stop component; 21. Flow-stop ring; 211. Elastic plate; 212. Positioning table; 213. Fixed table; 22. Flow-stop cloth; 221. Flared end; 222. Narrowed end; 223. Equal-diameter section; 224. Anti-wear layer; 225. Waterproof layer; 3. Fixing structure; 31. Flange; 311. External thread; 32. Positioning disk; 33. Fixing piece; 331. Retaining ring; 4. Rock mass; 5. Grouting hole; 6. Feed pipe. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-8 , the present invention provides the following technical solutions: A grouting device for mine geological disaster control, which consists of a grouting unit 1, a flow-stop component 2 and a fixing structure 3;

[0029] The grouting unit 1 can be smoothly inserted into the pre-drilled grouting hole 5 in the rock mass 4 and perform grouting operations into the hole. The flow-stop component 2 is firmly installed on the rock mass 4 through the fixing structure 3, and its position is exactly located 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 component 2 can effectively prevent the slurry in the grouting hole 5 from flowing out from the entrance.

[0030] [[ID=1(6]]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 feed pipe 6 is connected, and the two can be tightly combined by means of threaded connection or snap fixation. The feed pipe 6 serves as a slurry conveying channel, smoothly introducing the slurry into the interior of the grouting unit 1. Subsequently, the slurry is accurately injected into the grouting hole 5 through the grouting unit 1.

[0031] Please refer to Figure 3 , Figure 4 and Figure 7, the flow - stopping component 2 is composed of a flow - stopping ring 21 and a flow - stopping cloth 22. The flow - stopping cloth 22 is designed as an annular cylinder, with a flared end 221 and a constricted end 222. At the constricted end 222, an equal - diameter section 223 extending in the same direction as the grouting unit 1 is extended, and its diameter exactly matches the diameter of the grouting unit 1. The flared end 221 is tightly clamped between the flow - stopping ring 21 and the fixing structure 3 through the fixing structure 3, achieving a firm connection.

[0032] The flow - stopping cloth 22 is composed of two anti - abrasion layers 224 and two waterproof layers 225. The anti - abrasion layer 224 is made of nylon cloth, and the waterproof layer 225 is made of waterproof canvas. Among them, the two anti - abrasion layers 224 are located on the outside, while the two waterproof layers 225 are sandwiched between these two anti - abrasion layers 224. The anti - abrasion layer 224 and the waterproof layer 225 are tightly connected by an adhesive. The setting of the anti - abrasion layer 224 not only enhances the overall strength of the flow - stopping cloth 22 but also further effectively protects the internal waterproof layer 225.

[0033] Two elastic plates 211 are symmetrically arranged on the flow - stopping ring 21. One end of them is integrally formed with the flow - stopping ring 21, with a compact structure. In the natural state, the other ends of the two elastic plates 211 are in contact with each other. The elastic plates 211 penetrate into the interlayer between the two waterproof layers 225. Thanks to this design, the equal - diameter section 223 of the flow - stopping cloth 22 can remain closed in the natural state, effectively preventing the leakage of the slurry.

[0034] During use, first, the flow - stopping component 2 is firmly installed at the entrance of the grouting hole 5 through the fixing structure 3. Then, the grouting unit 1 passes through the middle of the flow - stopping cloth 22 and enters the interior of the grouting hole 5. This action makes the grouting unit 1 abut against the two elastic plates 211, causing the two elastic plates 211 to open automatically. At the same time, the equal - diameter section 223 of the flow - stopping cloth 22 is tightly attached to the outer surface of the grouting unit 1, and then the grouting unit 1 is fixed. After that, the slurry is slowly injected into the grouting hole 5 through the grouting unit 1. When the grouting hole 5 is filled with slurry, due to the tight fit between the flow - stopping cloth 22 and the grouting unit 1, and the firm support provided by the elastic plates 211 to the flow - stopping cloth 22, the slurry is effectively prevented from flowing out of the grouting hole 5. At the same time, the supporting effect of the elastic plates 211 also ensures that the flow - stopping cloth 22 will not turn out from the gap between the grouting unit 1 and the flow - stopping ring 21, thus significantly improving the sealing effect.

[0035] When the grouting unit 1 needs to be pulled out, the flow-stop cloth 22 will move smoothly on the outer surface of the grouting unit 1 relying on the elastic plate 211. When the flow-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 flow-stop cloth 22 will closely adhere to the conical surface. As the flow-stop cloth 22 gradually detaches from the conical surface, its gap will gradually shrink. Such a design can minimize the slurry leakage that may be caused when the grouting unit 1 is withdrawn instantaneously. In addition, the elastic plate 211 not only supports the flow-stop cloth 22 to prevent it from turning out into the grouting hole 5, but also assists the equal-diameter section 223 of the flow-stop cloth 22 to close. In contrast, in some traditional one-way valve technologies (such as Figure 8 as shown), when the valve body passes through the conical surface, a gap a often occurs, and this gap a is likely to cause slurry leakage. However, this solution effectively avoids the occurrence of this series of problems.

[0036] In addition, after the slurry solidifies, the flow-stop component 2 needs to be removed. Given that the flow-stop cloth 22 may adhere tightly to the solidified slurry and is difficult to directly take out, when disassembling the flow-stop ring 21, a blade can be used to cut the connection of the flow-stop cloth 22 at the elastic plate 211 so that the elastic plate 211 can smoothly detach from the flow-stop cloth 22. In this way, the elastic plate 211 can be reused, effectively reducing the cost.

[0037] Please refer to Figure 2 and Figure 3 , the fixing structure 3 mainly includes a flange 31, and the flange 31 is firmly installed at the inlet end of the grouting hole 5 through screws. Before this installation operation, threaded holes need to be pre-processed at the inlet of the grouting hole 5 so that the screws can fix the flange 31 to the rock mass 4 smoothly. The flow-stop ring 21 is integrally designed with a positioning platform 212 and a fixing platform 213. The positioning platform 212 is in a circular ring shape and is sleeved inside the inner diameter of the flange 31; in the gap between the positioning platform 212 and the inner diameter of the flange 31, the flow-stop cloth 22 can be tightly clamped. The fixing platform 213 is located between the flange 31 and the rock mass 4. Similarly, the flow-stop cloth 22 is also firmly clamped between the flange 31 and the fixing platform 213. Such a design not only effectively prevents slurry leakage but also significantly improves the sealing performance of the flow-stop cloth 22.

[0038] Please refer to Figure 5 , the grouting unit 1 is composed of two inner and outer cylinders, namely the inner cylinder 11 and the outer cylinder 12. The inner cylinder 11 is sleeved inside the outer cylinder 12. On the inner wall of the outer cylinder 12, along its length direction, a chute 121 is provided; on the outer wall of the inner cylinder 11, a slider 112 that can freely slide in the chute 121 is equipped. Such a design ensures that the inner cylinder 11 can only slide inside the outer cylinder 12.

[0039] Both the inner cylinder 11 and the outer cylinder 12 are provided with first slurry outlet holes 13. When the slider 112 slides to the end closest to the tapered surface of the outer cylinder 12, the two first slurry outlet holes 13 coincide with each other, allowing smooth injection of slurry into the grouting hole 5. When the slider 112 slides to the end away from the tapered surface, the two first slurry outlet holes 13 are offset from each other, effectively preventing slurry from flowing out of the first slurry outlet holes 13.

[0040] It's particularly noteworthy that the end of the inner tube 11 near the conical surface is designed to be open, allowing the interior of the inner tube 11 to communicate with the outside world (i.e., the interior of the outer tube 12). Furthermore, a second slurry outlet 14 is provided on the conical surface of the outer tube 12. This second slurry outlet 14 is located at the top of the conical surface and communicates with the interior of the outer tube 12. This allows the slurry to smoothly enter the grouting hole 5 through the second slurry outlet 14.

[0041] 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 inside of 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.

[0042] Considering that the outer surface of the grouting unit 1 is distributed with multiple first slurry outlet holes 13, once some 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, when we extract the grouting unit 1, we stagger the first slurry outlet holes 13 on the inner tube 11 and the outer tube 12, thereby sealing the first slurry outlet holes 13 and ensuring that the slurry is discharged only 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, the supply of slurry to the interior of the grouting unit 1 is stopped in time to prevent the slurry from leaking from the second slurry outlet holes 14.

[0043] See also Figure 2 In order to achieve a stable fixation of the grouting unit 1 and ensure that the first slurry outlet holes 13 on the inner tube 11 and the outer tube 12 can overlap or stagger as needed, a fixing structure 3 is adopted. The structure also includes a positioning plate 32 and a fixing member 33.

[0044] Specifically, the positioning plate 32 is tightly connected to one end of the outer cylinder 12 close to the pulp inlet pipe 6 through a thread. Subsequently, the positioning plate 32 is installed in the center of the flange 31 so that one side thereof abuts against the positioning platform 212, thereby achieving a stable positioning effect.

[0045] An annular integral block 113 is provided at one end of the inner cylinder 11 near the pulp inlet pipe 6. The block 113 is integrated with the inner cylinder 11 and has a solid structure. An external thread 311 is provided on one side of the flange 31 for threaded connection with the fixing member 33.

[0046] The fixing member 33 is specially provided with a retaining ring 331. When the fixing member 33 is threaded onto the external thread 311, the retaining ring 331 tightly abuts against the stopper 113. This design allows the tightening force of the fixing member 33 to be used to push the inner cylinder 11 toward the tapered end of the outer cylinder 12 via the stopper 113 until the first slurry outlet holes 13 on the inner and outer cylinders 11 and 12 coincide with each other.

[0047] At this point, the slurry can be smoothly injected into the grouting hole 5 through the first grouting hole 13, and the grouting operation can be carried out. At the same time, the fixing member 33 firmly presses the positioning plate 32 against the positioning platform 212, ensuring that the axis of the grouting unit 1 is accurately positioned. This design allows the grouting unit 1 to remain in a tilted state inside the grouting hole 5, effectively avoiding the problem of the grouting unit 1 contacting the inner wall of the grouting hole 5, which would cause part of the first grouting hole 13 to be blocked.

[0048] When the grouting holes 5 are filled with slurry and the grouting unit 1 needs to be removed, the fixing member 33 is first unscrewed to release its restraining effect on the stop block 113. Subsequently, the pressure inside the grouting unit 1 causes relative movement between the inner cylinder 11 and the outer cylinder 12, causing the first slurry outlet holes 13 on the inner cylinder 11 and the outer cylinder 12 to be offset from each other. This effectively prevents the slurry inside from leaking out of the first slurry outlet hole 13 when the grouting unit 1 is removed, thereby reducing waste.

[0049] In another embodiment, the end of the spring plate 211 away from the stop ring 21 is set in an upward shape, which can prevent the end of the spring plate 211 from getting stuck on the first slurry outlet 13, making it difficult to pull out the grouting unit 1. 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 mine geological disasters, comprising: Grouting unit (1), characterized in that a flow-stop assembly (2) is provided on the grouting unit (1), and the flow-stop assembly (2) is fixed on the rock mass (4) through a fixing structure (3). When the grouting unit (1) is withdrawn from the grouting hole (5), the flow-stop assembly (2) can prevent the slurry in the grouting hole (5) from flowing out from the inlet. The flow-stop assembly (2) includes a flow-stop ring (21) and a flow-stop cloth (22). The flow-stop cloth (22) is in the shape of an annular cylinder, one end of which is fixed between the flow-stop ring (21) and the fixing structure (3) through the fixing structure (3), and the other end is provided with an equal-diameter section (223) equal to the diameter of the grouting unit (1). Two elastic plates (211) with one end in contact with each other are symmetrically arranged on the flow-stop ring (21), and the flow-stop cloth (22) is arranged on the elastic plates (211). When the grouting unit (1) enters the grouting hole (5), the grouting unit (1) can push the two elastic plates (211) into the interior of the grouting hole (5) and pass through the equal-diameter section (223) into the interior of the grouting hole (5). The grouting unit (1) includes an inner cylinder (11) and an outer cylinder (12). One end of the outer cylinder (12) away from the flow-stop assembly (2) is in a conical shape, and a second slurry outlet hole (14) is provided at the tip. The inner cylinder (11) is sleeved inside the outer cylinder (12). One end of the inner cylinder (11) close to the conical surface of the outer cylinder (12) is open and communicates with the interior of the outer cylinder (12). First slurry outlet holes (13) are provided on both the inner cylinder (11) and the outer cylinder (12). A chute (121) is arranged on the inner wall of the outer cylinder (12) along its length direction. A slider (112) capable of sliding in the chute (121) is arranged on the outer wall of the inner cylinder (11). When the slider (112) slides to the end away from the flow-stop assembly (2), the first slurry outlet holes (13) of the outer cylinder (12) and the inner cylinder (11) coincide. When the slider (112) slides to the end close to the flow-stop assembly (2), the first slurry outlet holes (13) of the outer cylinder (12) and the inner cylinder (11) are staggered from each other. The fixing structure (3) includes a flange plate (31), a positioning plate (32) and a fixing part (33). The flange plate (31) is fixedly installed at the inlet end of the grouting hole (5). The flow-stop ring (21) is located between the flange plate (31) and the rock mass (4). The flow-stop cloth (22) is located in the gap between the flow-stop ring (21) and the flange plate (31) and can clamp one end of the flow-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 flow-stop ring (21). A blocking block (113) is arranged at one end of the inner cylinder (11). The fixing part (33) is threadedly connected to the flange plate (31), and a retaining ring (331) is arranged on the fixing part (33). When the fixing part (33) is threadedly connected to the external thread (311) of the flange plate (31), the retaining ring (331) can tightly abut against the blocking block (113). The flow-stop ring (21) is provided with a positioning table (212) and a fixing table (213). The positioning table (212) is sleeved in the inner diameter of the flange plate (31), and the fixing table (213) is located between the flange plate (31) and the rock mass (4). The flow-stop cloth (22) is also clamped between the flange plate (31) and the fixing table (213) and between the flange plate (31) and the positioning table (212).

2. The grouting device for controlling mine geological disasters according to claim 1, characterized in that: The flow-stop cloth (22) comprises two anti-abrasion layers (224) and two waterproof layers (225). Among them, the two anti-abrasion layers (224) are located on the outer side, and the two waterproof layers (225) are located between the two anti-abrasion layers (224).

3. The grouting device for controlling mine geological disasters according to claim 2, wherein: The elastic plate (211) is located between the two waterproof layers (225).

4. A grouting device for controlling mine geological disasters according to claim 1, characterized in that: One end of the elastic plate (211) away from the flow-stop ring (21) is arranged in an upwardly warped shape.

5. The grouting device for controlling mine geological disasters according to claim 2, characterized in that: The anti-abrasion layer (224) is made of nylon cloth, and the waterproof layer (225) is made of waterproof canvas.

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