A mine high confining pressure full-length prestressed anchoring cable structure

Abstract

This invention relates to the field of mine tunnel support technology, and more particularly to a mine-use high-confining-pressure, full-length prestressed anchor cable structure. It includes an anchor cable and a fixing mechanism mounted on the anchor cable. The fixing mechanism includes a first grouting pipe located on one side of the anchor cable, a Y-shaped pipe on one side of the first grouting pipe, and mounting seats symmetrically fixed to the anchor cable, communicating with the Y-shaped pipe. A first slider is slidably connected radially to the mounting seat along the anchor cable, and a rectangular groove is formed on the first slider. Two second sliders are slidably connected radially to the rectangular groove along the anchor cable, and two first wedges are fixed to the second sliders. By setting up the fixing mechanism, when clean water is injected into the first grouting pipe, the first wedges can quickly embed into the rock strata of the anchor hole, achieving initial fixing of the anchor cable. When the rock strata of the anchor hole are softer, and the anchor cable is pre-tensioned, the rotation of the second wedges in the fixing mechanism allows the first wedges to move and further embed into the anchor hole, improving the fixing effect of the anchor cable.

Description

Technical Field

[0001] This invention relates to the field of mine tunnel support technology, and in particular to a mine-use high confining pressure full-length prestressed anchor cable structure. Background Technology

[0002] Currently, the difficulty of roadway support is greatly increased under the influence of soft rock roadways and strong dynamic pressure. The support effect is greatly reduced due to the soft rock, joint and fissure development and strong dynamic pressure. Against this background, hollow full-length grouting anchor cables have been developed. However, these anchor cables need to be anchored with chemical anchoring agents in advance, tensioned and pre-tightened, and then grouted after shotcreting and sealing to form full-length anchorage. The process is complicated, the construction period is long and the prestressing effect is poor. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a mining high confining pressure full-length prestressed anchor cable structure.

[0004] The technical solution is as follows: a mining high confining pressure full-length prestressed anchor cable structure, including an anchor cable and a fixing mechanism disposed on the anchor cable. The fixing mechanism includes a first grouting pipe disposed on one side of the anchor cable, a Y-shaped pipe disposed on one side of the first grouting pipe, mounting seats symmetrically fixed to the anchor cable and communicating with the Y-shaped pipe, a first slider slidably connected in the mounting seat along the radial direction of the anchor cable, a rectangular groove opened on the first slider, two second sliders slidably connected in the rectangular groove along the radial direction of the anchor cable, two first wedges fixed to the second sliders, a fastening mechanism disposed on the first slider, the fastening mechanism including a second wedge disposed between the two second sliders and hinged to the first slider, and a sealing mechanism disposed on the anchor cable.

[0005] Furthermore, it is particularly preferred that the fastening mechanism also includes a third slider slidably connected in a rectangular groove, wherein two third wedges are fixedly connected to the third slider, and the second slider has a wedge groove that matches the third wedges.

[0006] Furthermore, it is particularly preferred that the fastening mechanism also includes a lever fixed to the second wedge, and the third slider is rotatably connected to a rotating shaft that cooperates with the lever.

[0007] Furthermore, it is particularly preferred that the sealing mechanism includes a T-shaped sleeve fixedly fitted on the anchor cable, a sealing component fixedly fitted on the T-shaped sleeve, a push ring for pushing the sealing component slidably fitted on the T-shaped sleeve, a distribution pipe fixedly fitted on the anchor cable, and the first grouting pipe and the Y-shaped pipe both communicating with the distribution pipe.

[0008] Furthermore, it is particularly preferred that the sealing mechanism also includes a telescopic shaft symmetrically connected to the end of the distribution tube for driving the push ring movement.

[0009] Furthermore, it is particularly preferred that the sealing mechanism also includes a perforated sealing ring rotatably connected within the distribution tube.

[0010] Furthermore, it is particularly preferred that the sealing mechanism also includes an arc-shaped frame fixed inside the distribution pipe, an elastic sliding plate slidably connected inside the arc-shaped frame, and a connecting block fixedly connected between the elastic sliding plate and the hollow sealing ring.

[0011] Furthermore, it is particularly preferred that a second grouting pipe is fixedly connected through the T-shaped sleeve and the distribution pipe, and an insert plate is inserted through the second grouting pipe.

[0012] Furthermore, it is particularly preferred that a protruding plate is fixedly connected to the hollow sealing ring, and a tension spring is provided between the protruding plate and the insert plate.

[0013] Furthermore, it is particularly preferred that a guide frame is fixedly connected inside the distribution pipe, the insert plate is slidably connected through the guide frame, an elastic limiting block is slidably connected inside the guide frame, and a limiting groove matching the elastic limiting block is provided on the insert plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up a fixing mechanism, when water is injected into the first grouting pipe, the first wedge can be quickly embedded into the rock stratum of the anchor hole wall to achieve initial fixing of the anchor cable. When the rock stratum of the anchor hole wall is relatively soft and the anchor cable is pre-tensioned, the first wedge can be further embedded into the anchor hole by rotating the second wedge in the fastening mechanism, thereby improving the fixing effect of the anchor cable.

[0015] 2. By setting up a sealing mechanism, after the first and second wedges are firmly embedded in the rock strata of the anchor hole, the elastic slide can slide under the action of clean water, and drive the hollow sealing ring to rotate through the connecting block, so that the hollow sealing ring no longer blocks the connection between the distribution pipe and the telescopic shaft, and the push ring automatically squeezes the sealing component to achieve the sealing of the anchor hole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixing mechanism of the present invention; Figure 3 This is a schematic diagram of the installation at the first wedge block of the present invention; Figure 4 This is a schematic diagram of the installation of the fastening mechanism of the present invention; Figure 5 This is a schematic diagram of the sealing mechanism of the present invention; Figure 6This is a schematic diagram of the T-shaped sleeve of the present invention; Figure 7 This is a schematic diagram of the installation of the hollow sealing ring of the present invention; Figure 8 This is a schematic diagram of the installation at the arc-shaped frame of the present invention; Figure 9 This is a schematic diagram of the installation of the guide frame of the present invention; Figure 10 This is a schematic diagram of the installation of the elastic limiting block of the present invention.

[0017] The labels in the diagram are as follows: 1: Anchor cable, 201: First grouting pipe, 202: Y-shaped pipe, 203: Mounting base, 204: First slider, 205: Second slider, 206: First wedge, 207: Second wedge, 301: Third slider, 302: Third wedge, 401: Pulling block, 402: Rotating shaft, 501: T-shaped sleeve, 502: Sealing component, 503: Push ring, 504: Distribution pipe, 505: Telescopic shaft, 601: Hollow sealing ring, 701: Arc frame, 702: Elastic sliding plate, 703: Connecting block, 801: Second grouting pipe, 802: Insert plate, 901: Protruding plate, 1001: Guide frame, 1002: Elastic limiting block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention. Example

[0019] A type of high confining pressure, fully prestressed anchor cable structure for mining applications, such as... Figures 1-4As shown, the device includes an anchor cable 1 and a fixing mechanism mounted on the anchor cable 1. The fixing mechanism includes a first grouting pipe 201 located on one side of the anchor cable 1. A Y-shaped pipe 202 is located on the left side of the first grouting pipe 201. A mounting base 203 communicating with the Y-shaped pipe 202 is symmetrically fixed to the left end of the outer wall of the anchor cable 1. A first slider 204 is slidably connected radially to the mounting base 203 along the anchor cable 1. A rectangular groove is formed on the first slider 204. Two second sliders 205 are slidably connected radially to the anchor cable 1 within the rectangular groove. Two first wedges 206 are fixedly attached to the first grouting pipe 201. By injecting clean water into the first grouting pipe 201, the first wedges 206 can be embedded into the wall of the anchor hole. The first slider 204 is provided with a fastening mechanism, which includes a second wedge 207 located between the two second sliders 205 and hinged to the first slider 204. The second wedge 207 and the first wedge 206 are at the same height. The fastening mechanism can further embed the first wedge 206 into the wall of the anchor hole. The anchor cable 1 is provided with a sealing mechanism.

[0020] like Figure 3 and Figure 4 As shown, the fastening mechanism also includes a third slider 301 that is slidably connected in a rectangular groove in the horizontal direction. Two third wedges 302 are fixed to the side of the third slider 301 near the second slider 205. The second slider 205 has a wedge groove that matches the third wedges 302. When the second wedge 207 rotates, the third wedges 302 can squeeze the wedge groove of the second slider 205, causing the second slider 205 to drive the first wedge 206 to move.

[0021] like Figure 3 and Figure 4 As shown, the fastening mechanism also includes a paddle 401 fixed to the second wedge 207, and a rotating shaft 402 that cooperates with the paddle 401 is rotatably connected to the third slider 301. When the second wedge 207 rotates, it can drive the paddle 401 to press against the rotating shaft 402, causing the third slider 301 to slide.

[0022] like Figures 5-7 As shown, the sealing mechanism includes a T-shaped sleeve 501 fixedly fitted on the outer wall of the anchor cable 1. A sealing component 502 is fixedly fitted on the outer wall of the T-shaped sleeve 501. The sealing component 502 is made of flexible material. A push ring 503 for pushing the sealing component 502 is slidably fitted on the outer wall of the T-shaped sleeve 501 in the left and right direction. A distribution pipe 504 located to the left of the push ring 503 is fixedly fitted on the outer wall of the anchor cable 1. The first grouting pipe 201 and the Y-shaped pipe 202 are both connected to the distribution pipe 504.

[0023] like Figure 5 and Figure 7 As shown, the sealing mechanism also includes telescopic shafts 505 that are symmetrically connected to the right end of the distribution pipe 504. The telescopic ends of the two telescopic shafts 505 are fixedly connected to the left end of the push ring 503.

[0024] like Figure 7 and Figure 8 As shown, the sealing mechanism also includes a hollow sealing ring 601 rotatably connected to the right side of the inner wall of the distribution pipe 504. The hollow sealing ring 601 is used to seal the connection between the distribution pipe 504 and the fixed ends of the two telescopic shafts 505.

[0025] like Figure 7 and Figure 8 As shown, the sealing mechanism also includes an arc-shaped frame 701 fixed to the inner wall of the distribution pipe 504. An elastic slide plate 702 is slidably connected inside the arc-shaped frame 701. A connecting block 703 is fixedly connected between the elastic slide plate 702 and the hollow sealing ring 601. The elastic slide plate 702 has a large elastic force. When the first wedge block 206 is not firmly embedded in the wall of the anchor hole, the elastic slide plate 702 will not slide. When the elastic slide plate 702 is squeezed and slid by clean water, it can prevent the hollow sealing ring 601 from blocking the connection between the distribution pipe 504 and the fixed ends of the two telescopic shafts 505.

[0026] First, the anchor cable 1 is placed into the anchor hole. Then, clean water is injected into the first grouting pipe 201. Subsequently, the clean water enters the Y-shaped pipe 202 and flows along the Y-shaped pipe 202 to the two mounting seats 203. The clean water squeezes the two first sliders 204, causing the two first sliders 204 to slide away from each other. The first sliders 204 drive the two second sliders 205 and the second wedges 207 on them to move. The second sliders 205 drive the two first wedges 206 on them to move until the first wedges 206 and the second wedges 207 are embedded in the rock strata of the anchor hole, thus achieving the initial fixation of the anchor cable 1. Then, the anchor cable 1 is tensioned and pre-tightened by hydraulic equipment.

[0027] During the tensioning and pre-tightening process of anchor cable 1, there are two specific situations. In the first situation, the rock strata of the anchor hole wall are hard and compact, and the first wedge 206 can be stably embedded in the anchor hole wall, so the anchor cable 1 will not move.

[0028] In the second scenario, the rock strata surrounding the anchor hole are relatively soft. When the anchor cable 1 is tensioned, the anchor cable 1 drives the two mounting seats 203 to move. The mounting seats 203 drive the first slider 204 to move outward from the anchor hole. The first slider 204, through the second slider 205 on it, drives the first wedge 206 to move outward from the anchor hole, and also drives the second wedge 207 to move outward from the anchor hole. The second wedge 207 is squeezed and rotated by the rock strata surrounding the anchor hole, which in turn drives the lever 401 to move. The lever 401 squeezes the rotating shaft 402, causing the rotating shaft 402 to be driven by the force. The third slider 301 slides to the right, causing the two third wedges 302 on it to move. The third wedges 302 squeeze the wedge groove of the second slider 205, causing the second slider 205 to slide away from the third slider 301. The second slider 205 causes the two first wedges 206 on it to further embed into the rock strata of the anchor hole, thereby improving the fixing effect of the anchor cable 1. At the same time, the second wedge 207 rotates and can further embed into the rock strata of the anchor hole, which, together with the first wedge 206, further improves the fixing effect of the anchor cable 1.

[0029] Initially, the perforated sealing ring 601 seals the connection between the distribution pipe 504 and the telescopic shaft 505. When clean water is injected into the first grouting pipe 201, the clean water enters the distribution pipe 504 through the first grouting pipe 201 and then enters the Y-shaped pipe 202 through the distribution pipe 504, thereby squeezing the two first sliders 204 with clean water. When the clean water squeezes the two first sliders 204, the elastic sliding plate 702 will not slide due to its large elasticity. After the first wedge 206 and the second wedge 207 are firmly embedded in the rock strata of the anchor hole, the clean water continues to enter through the first grouting pipe 201. Inside the distribution pipe 504, the pressure of the clean water is greater than the elastic force of the elastic slide plate 702. The elastic slide plate 702 contracts and slides under force, and drives the hollow sealing ring 601 to rotate through the connecting block 703. Then, the hollow sealing ring 601 no longer blocks the connection between the distribution pipe 504 and the telescopic shaft 505. Clean water enters the two telescopic shafts 505 and pushes the telescopic ends of the two telescopic shafts 505 to extend. The telescopic ends of the two telescopic shafts 505 together push the push ring 503 to slide to the right. The push ring 503 squeezes the sealing member 502. The sealing member 502 deforms under force and fits the hole wall of the anchor hole, thus sealing the anchor hole. Example

[0030] like Figure 5 , Figure 7 and Figure 9 As shown, a second grouting pipe 801 is connected through and fixed to both the T-shaped sleeve 501 and the distribution pipe 504. An insert plate 802 is inserted through and connected to the second grouting pipe 801. The insert plate 802 is used to seal the inner wall of the second grouting pipe 801.

[0031] like Figure 9As shown, a protruding plate 901 is fixed to the left end of the hollow sealing ring 601. A tension spring is provided between the protruding plate 901 and the insert plate 802. When the hollow sealing ring 601 rotates, the insert plate 802 can stop blocking the inner wall of the second grouting pipe 801.

[0032] like Figure 9 and Figure 10 As shown, a guide frame 1001 is fixedly connected to the inner wall of the distribution pipe 504. The insert plate 802 is slidably connected inside the guide frame 1001. An elastic limiting block 1002 is slidably connected inside the guide frame 1001. The elastic force of the elastic limiting block 1002 is greater than the tension spring force between the protruding plate 901 and the insert plate 802. A limiting groove matching the elastic limiting block 1002 is opened on the left side of the insert plate 802.

[0033] Initially, the insert plate 802 abuts against the inner wall of the second grouting pipe 801, sealing the second grouting pipe 801. While injecting clean water into the first grouting pipe 201, grout is injected into the second grouting pipe 801. The grout flows along the second grouting pipe 801 to the insert plate 802, where it is blocked. This prevents the grout from passing through the insert plate 802 when the sealing member 502 is not sealing the anchor hole, thus preventing leakage of the grout through the gap between the sealing member 502 and the anchor hole wall. When the elastic sliding plate 702 drives the hollow sealing ring 601 to rotate via the connecting block 703, the hollow sealing ring 601 drives the protruding plate 901 to move. Because the elastic force of the elastic limiting block 1002 is greater than the elastic force of the tension spring, the elastic limiting block 1002... Plate 802 is positioned to block the second grouting pipe 801. At this time, the tension spring gradually stretches and its elastic force gradually increases until the elastic sliding plate 702 elastically contracts and slides to its limit. At this time, the sealing component 502 completes the sealing of the anchoring hole, and the elastic force of the tension spring exceeds the elastic force of the elastic limiting block 1002. The tension spring contracts and drives the insert plate 802 to slide along the guide frame 1001. The limiting groove of the insert plate 802 squeezes the elastic limiting block 1002. The elastic limiting block 1002 contracts and slides away from the limiting groove. After the insert plate 802 slides, it no longer blocks the grout in the second grouting pipe 801. The grout enters the anchoring hole through the second grouting pipe 801 until the grout fills the anchoring hole, completing the anchoring work of the anchor cable.

[0034] In summary, by injecting clean water into the first grouting pipe 201 and grout into the second grouting pipe 801, the anchoring of the anchor cable can be completed quickly without the need for other operations by the staff. The process is extremely simple and the construction is rapid.

[0035] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A mine high confining pressure full-length prestressed anchoring cable structure, comprising a cable (1), characterized in that: It also includes a fixing mechanism on the anchor cable (1), the fixing mechanism includes a first grouting pipe (201) on one side of the anchor cable (1), a Y-shaped pipe (202) on one side of the first grouting pipe (201), a mounting seat (203) symmetrically fixed to the anchor cable (1) and communicating with the Y-shaped pipe (202), a first slider (204) is slidably connected in the mounting seat (203) along the radial direction of the anchor cable (1), a rectangular groove is opened on the first slider (204), two second sliders (205) are slidably connected in the rectangular groove along the radial direction of the anchor cable (1), two first wedges (206) are fixed on the second sliders (205), a fastening mechanism is provided on the first slider (204), the fastening mechanism includes a second wedge (207) located between the two second sliders (205) and hinged to the first slider (204), and a sealing mechanism is provided on the anchor cable (1).

2. The high confining pressure full-length prestressed anchoring cable structure for mining as claimed in claim 1, characterized in that: The fastening mechanism also includes a third slider (301) that is slidably connected in a rectangular groove. Two third wedges (302) are fixedly connected to the third slider (301). The second slider (205) has a wedge groove that matches the third wedges (302).

3. The high confining pressure, full-length prestressed anchor cable structure for mining as described in claim 2, characterized in that: The fastening mechanism also includes a lever (401) fixed to the second wedge (207), and a rotating shaft (402) that cooperates with the lever (401) is rotatably connected to the third slider (301).

4. The high confining pressure, full-length prestressed anchor cable structure for mining as described in claim 1, characterized in that: The sealing mechanism includes a T-shaped sleeve (501) fixedly fitted on the anchor cable (1), a sealing component (502) fixedly fitted on the T-shaped sleeve (501), a push ring (503) for pushing the sealing component (502) slidably fitted on the T-shaped sleeve (501), a distribution pipe (504) fixedly fitted on the anchor cable (1), and the first grouting pipe (201) and the Y-shaped pipe (202) are both connected to the distribution pipe (504).

5. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 4, characterized in that: The sealing mechanism also includes a telescopic shaft (505) symmetrically connected to the end of the distribution pipe (504) for driving the push ring (503) to move.

6. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 5, characterized in that: The sealing mechanism also includes a hollow sealing ring (601) that is rotatably connected within the distribution tube (504).

7. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 6, characterized in that: The sealing mechanism also includes an arc-shaped frame (701) fixed in the distribution pipe (504), an elastic slide plate (702) is slidably connected in the arc-shaped frame (701), and a connecting block (703) is fixedly connected between the elastic slide plate (702) and the hollow sealing ring (601).

8. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 7, characterized in that: The T-shaped sleeve (501) and the distribution pipe (504) are connected together by a second grouting pipe (801), and a plug plate (802) is inserted through the second grouting pipe (801).

9. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 8, characterized in that: A protruding plate (901) is fixedly connected to the hollow sealing ring (601), and a tension spring is provided between the protruding plate (901) and the insert plate (802).

10. A mine-use high confining pressure full-length prestressed anchor cable structure according to claim 9, characterized in that: A guide frame (1001) is fixedly connected inside the distribution pipe (504), and the insert plate (802) is slidably connected inside the guide frame (1001). An elastic limiting block (1002) is slidably connected inside the guide frame (1001), and a limiting groove matching the elastic limiting block (1002) is provided on the insert plate (802).

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