A pressure relief anchoring device for deep high-horizontal stress tunnels

Abstract

The present invention relates to a pressure relief anchoring device for a deep high-horizontal stress tunnel. A plurality of detection holes are drilled along the radial direction of the inner wall of the tunnel, including: at least two displacement bodies, a support frame, at least two rotating wheels, a scale, at least two connecting ropes, at least two marks, a video recording device, a drilling machine and a segmented grouting machine. The present invention: by recording the movement trajectory of at least two marks by the video recording device, it can be judged whether the detection hole corresponds to the at least two displacement bodies in a stretching separation zone or an extrusion contraction zone, thereby changing the existing support of the deep high-horizontal stress tunnel mainly based on a single measure of grouting reinforcement or drilling pressure relief to a flexible application of two measures of drilling pressure relief and segmented injection of hollow cylindrical bodies, thereby protecting the safety of the tunnel and extending the service life of the tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel maintenance devices, and in particular to a pressure relief anchoring device for a deep high-horizontal stress tunnel. Background Art

[0002] Pressure-relieving anchoring is an important method of tunnel support and maintenance. Under deep high-level stress fields, the deformation of tunnel surrounding rock often presents characteristics such as asymmetry, zonal rupture and large deformation. Reasonable support methods and precise control positions are the key to solving the problem of difficult support of such large-deformation tunnels.

[0003] Traditional shallow tunnel reinforcement support or pressure relief control near a certain depth with a threat of protrusion has better solved the tunnel support problem under conventional conditions in deep and shallow areas, but it has not played a good control effect on the asymmetric large deformation and zonal rupture problems of most deep tunnels with high levels of stress. The reason may be that there is no relevant mechanism research on the two completely opposite support measures acting on the same tunnel, so the proposed control countermeasures are somewhat blind, and a small number of successful supports are accidental and non-replicable.

[0004] The problems existing in the coordinated control of decompression anchoring and grouting in deep high-level stress tunnels are: finding the real-time movement state of the surrounding rock, establishing the working principles of the surrounding rock compression zone and the surrounding rock tension zone, and thus proposing tunnel surrounding rock control countermeasures under the two working conditions of tensile delamination and compressive high stress concentration.

[0005] Therefore, how to provide a pressure relief anchoring device for deep and high horizontal stress tunnels is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The present invention provides a deep high-horizontal stress tunnel pressure relief anchoring device, which detects the movement state of the tunnel surrounding rock in real time, determines the surrounding rock compression zone and the surrounding rock tension zone, and timely and accurately drills holes in the surrounding rock compression zone to relieve pressure, and injects hollow cylindrical bodies in the surrounding rock tension zone for reinforcement.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: a pressure relief anchoring device for a deep high-horizontal stress tunnel, wherein the inner wall of the tunnel is drilled with a plurality of detection holes along its radial direction, comprising: at least two displacement bodies, a support frame, at least two rotating wheels, a scale, at least two connecting ropes, at least two marks, a video recording device, a drilling machine and a segmented grouting machine,

[0008] At least two displacement bodies are fixed on the side walls of the detection hole in sequence along the axis of the detection hole and are displaced with the movement of the surrounding rock in the tunnel; a support frame is fixed at the exit of the detection hole; at least two rotating wheels are connected to the support frame for rotation in parallel; a scale is vertically fixed on the inner wall of the tunnel corresponding to the lower side of the support frame; one end of at least two connecting ropes is fixedly connected to the at least two displacement bodies one by one, and the other end is respectively passed through the two rotating wheels and suspended on one side of the scale; at least two marks are respectively fixedly connected to the other ends of the at least two connecting ropes one by one and move up and down on one side of the scale with the movement of the displacement bodies; a video recording device is fixed in the tunnel and can respectively record the movement trajectory of the at least two marks to determine whether the detection hole corresponding to the at least two displacement bodies is in the stretching separation zone or the extrusion contraction zone; a pressure relief hole with the same depth as the extrusion contraction zone is drilled on the inner wall of the tunnel corresponding to the detection hole of the drilling machine; a hollow cylindrical body is injected into the side wall of the detection hole of the segmented grouting machine corresponding to the stretching separation zone.

[0009] The beneficial effect of the present invention is that by recording the movement trajectory of at least two marks through a video recording device, it is possible to determine whether the detection hole corresponding to at least two displacement bodies is in a tensile separation zone or an extrusion contraction zone, thereby changing the existing support of deep high-horizontal stress tunnels based on a single measure of grouting reinforcement or drilling pressure relief to a flexible application of two measures, drilling pressure relief and segmented injection of hollow columns, thereby protecting the safety of the tunnel and extending the service life of the tunnel.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, at least two displacement bodies are inverted wedge-shaped structures.

[0012] The beneficial effect of adopting the above technical solution is that the displacement body is an inverted wedge-shaped structure and can be better fixed in the detection hole.

[0013] Furthermore, the label is a fluorescent label.

[0014] Furthermore, the drilling machine is an anchor drilling machine.

[0015] Furthermore, the diameter of the pressure relief hole is 2mm-5mm.

[0016] Furthermore, the segmented grouting machine includes a grouting machine, two partitions and a grouting pipe, and the grouting machine is connected to the external slurry; the two partitions are arranged along the radial direction of the detection hole at the two ends of the detection hole corresponding to its stretching separation zone and a grouting pipe through hole is provided in the middle; one end of the grouting pipe is connected to the discharge port of the grouting machine and a plurality of injection ports are opened on its side wall corresponding to the two partitions.

[0017] The beneficial effect of adopting the above technical solution is that after the grouting machine completes the injection, the two partitions are fixed in the detection hole along with the grouting, which can enhance the reinforcement effect of the hollow column and prevent the tunnel surrounding rock from further deformation.

[0018] Furthermore, the outer diameter of the hollow cylindrical body is 20 mm-28 mm, and the inner diameter is 2 mm-5 mm.

[0019] Furthermore, it also includes a spring, which is sleeved on the outer peripheral side of at least two connecting ropes.

[0020] The beneficial effect of adopting the above technical solution is that the spring can assist at least two connecting ropes and at least two displacement bodies to be placed into the detection hole synchronously, thereby improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation structure of a deep high-horizontal stress tunnel pressure relief anchoring device of the present invention;

[0022] Figure 2 This is a schematic diagram of the inner installation structure of a deep high-horizontal stress tunnel pressure relief anchoring device of the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged local structure of the A area in the middle;

[0024] Figure 4 It is a schematic diagram of the structure of a hollow cylindrical body injected by a segmented grouting machine in a pressure relief anchor injection device for a deep high-horizontal stress tunnel;

[0025] Figure 5 for Figure 4 A schematic diagram of the enlarged local structure of the middle B area;

[0026] Figure 6 It is a schematic diagram of the hollow cylindrical structure of a pressure relief anchoring device in a deep high-horizontal stress tunnel;

[0027] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point C in the figure.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Tunnel, 2. Detection hole, 3. Displacement body, 4. Support frame, 5. Rotating wheel, 6. Scale, 7. Connecting rope, 8. Mark, 9. Video recording device, 10. Segmented grouting machine, 101. Grouting machine, 102. Partition, 103. Grouting pipe, 1031. Spraying port, 11. Spring, 12. Hollow cylindrical body, 13. Pressure relief hole. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] like Figure 1 As shown, a pressure relief anchoring device for a deep high-horizontal stress tunnel, wherein a plurality of detection holes 2 are drilled along the radial direction of the inner wall of a tunnel 1, comprising: at least two displacement bodies 3, a support frame 4, at least two rotating wheels 5, a scale 6, at least two connecting ropes 7, at least two marks 8, a video recording device 9, a drilling machine and a segmented grouting machine 10,

[0032] At least two displacement bodies 3 are fixed on the side walls of the detection hole 2 in sequence along the axis of the detection hole 2 and are displaced with the movement of the surrounding rock in the tunnel 1; the support frame 4 is fixed at the exit of the detection hole 2; at least two rotating wheels 5 are connected to the support frame 4 for rotation in parallel; a scale 6 is vertically fixed on the inner wall of the tunnel 1 corresponding to the lower side of the support frame 4; one end of at least two connecting ropes 7 is fixedly connected to at least two displacement bodies 3 one by one, and the other end is respectively passed through the two rotating wheels 5 and suspended on one side of the scale 6; at least two marks 8 are respectively connected to The other ends of at least two connecting ropes 7 are fixedly connected and move up and down on one side of the scale 6 with the movement of the displacement body 3; the video recording device 9 is fixed in the tunnel 1 and can respectively record the movement trajectory of at least two marks 8 to determine whether the detection hole 2 corresponding to the at least two displacement bodies 3 is in the stretching separation zone or the extrusion contraction zone; the drilling machine drills a pressure relief hole 13 with the same depth as the extrusion contraction zone on the inner wall of the tunnel 1 on the side of the detection hole 2 corresponding to the drilling machine; the segmented grouting machine 10 sprays a hollow cylindrical body 12 on the side wall of the detection hole 2 corresponding to the stretching separation zone.

[0033] In some specific embodiments, at least two displacement bodies 3 may both be inverted wedge-shaped structures.

[0034] In some specific embodiments, the label 8 can be a fluorescent label.

[0035] In some specific embodiments, the drilling machine may be a roof bolter.

[0036] In some specific embodiments, the diameter of the pressure relief hole 13 may be 5 mm-8 mm.

[0037] In some specific embodiments, the segmented grouting machine 10 may include a grouting machine 101, two partitions 102 and a grouting pipe 103, the grouting machine 101 is connected to the external slurry; the two partitions 102 are arranged along the radial direction of the detection hole 2 at the two ends of the detection hole 2 corresponding to its stretching separation zone and a grouting pipe through hole 821 is provided in the middle thereof; one end of the grouting pipe 103 is connected to the discharge port of the grouting machine 101 and a plurality of injection ports 1031 are opened on its side wall corresponding to the two partitions 102.

[0038] In some specific embodiments, the outer diameter of the hollow cylindrical body 12 may be 20 mm-28 mm, and the inner diameter may be 5 mm-8 mm.

[0039] In some specific embodiments, a spring 11 may be further included, and the spring 11 is sleeved on the outer circumference of at least two connecting ropes 7 .

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure relief anchoring device for deep high-level stress tunnels, wherein the inner wall of the tunnel (1) is drilled with a plurality of detection holes (2) along its radial direction, characterized in that: include: At least two displacement bodies (3), a support frame (4), at least two rotating wheels (5), a scale (6), at least two connecting ropes (7), at least two markings (8), a video recording device (9), a drilling machine and a segmented grouting machine (10), At least two of the displacement bodies (3) are fixed on the side walls of the detection hole (2) in sequence along the axis of the detection hole (2) and are displaced along with the movement of the surrounding rock in the tunnel (1); the support frame (4) is fixed at the exit of the detection hole (2); at least two of the rotating wheels (5) are rotatably connected to the support frame (4) in parallel; the scale (6) is vertically fixed on the inner wall of the tunnel (1) corresponding to the lower side of the support frame (4); one end of at least two of the connecting ropes (7) is fixedly connected to the at least two displacement bodies (3) one by one, and the other end of each of the connecting ropes is respectively passed through the two rotating wheels (5) and suspended on one side of the scale (6); at least two of the markings (8) are respectively One is fixedly connected to the other end of at least two of the connecting ropes (7) and moves up and down on one side of the scale (6) with the movement of the displacement body (3); the video recording device (9) is fixed in the tunnel (1) and can respectively record the movement trajectory of at least two of the marks (8) to determine whether the detection hole (2) between the at least two displacement bodies (3) is in the stretching separation zone or the extrusion contraction zone; the drilling machine is provided with a pressure relief hole (13) having the same depth as the extrusion contraction zone on the inner wall of the tunnel (1) on the side of the detection hole (2); the segmented grouting machine (10) is provided with a hollow cylindrical body (12) on the side wall of the detection hole (2) corresponding to the stretching separation zone: The segmented grouting machine (10) comprises a grouting machine (101), two partitions (102) and a grouting pipe (103); the grouting machine (101) is connected to external slurry; the two partitions (102) are arranged along the radial direction of the detection hole (2) at the two ends of the detection hole (2) corresponding to the stretching separation zone thereof, and a grouting pipe through hole (821) is provided in the middle thereof; one end of the grouting pipe (103) is connected to the discharge port of the grouting machine (101), and a plurality of injection ports (1031) are opened on its side wall corresponding to the two partitions (102); It also comprises a spring (11), wherein the spring (11) is sleeved on the outer peripheral side of at least two of the connecting ropes (7).

2. A deep high-level stress tunnel pressure relief anchoring device according to claim 1, characterized in that: At least two of the displacement bodies (3) are both inverted wedge-shaped structures.

3. The deep high-level stress tunnel pressure relief anchoring device according to claim 1 is characterized in that: The label (8) is a fluorescent label.

4. The deep high-level stress tunnel pressure relief anchoring device according to claim 1 is characterized in that: The drilling machine is an anchor drilling machine.

5. The deep high-level stress tunnel pressure relief anchoring device according to claim 1 is characterized in that: The diameter of the pressure relief hole (13) is 5 mm to 8 mm.

6. The deep high-level stress tunnel pressure relief anchoring device according to claim 1 is characterized in that: The outer diameter of the hollow cylindrical body (12) is 20 mm-28 mm, and the inner diameter is 5 mm-8 mm.

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