Fractured rock mass supporting device

Abstract

The utility model relates to the technical field of tunneling, in particular to a fractured rock mass supporting device which comprises an annular supporting frame, a plurality of supporting rods and a plurality of supporting rods. The first reinforcing plates are annularly distributed on the inner wall of the annular supporting frame at equal intervals, and reset assemblies are arranged between one sides of the first reinforcing plates and the inner wall of the annular supporting frame; the second reinforcing plates are annularly distributed on the inner wall of the annular supporting frame at equal intervals, and the positions of the second reinforcing plates and the positions of the first reinforcing plates are staggered. According to the supporting device, the first reinforcing plate and the second reinforcing plate can be conveniently attached to the interior of the tunnel roadway, the round broken rock mass area of the tunnel roadway is supported, the operation mode that in the prior art, broken rock masses are supported through anchor rods is replaced, and the firmness performance of the whole supporting device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring, in particular to a support device for broken rock mass. Background Technique

[0002] During the tunnel boring process, tunnels in broken rock mass are a relatively common difficult construction section, and the failure of the tunnel face is one of the main plastic failure mechanisms affecting tunnel construction and operation. Therefore, in order to ensure the smooth progress and normal operation of the project construction and ensure the safety of construction personnel, it is usually necessary to set up support structures in the roadways of these broken rock mass areas.

[0003] After retrieval, a roadway support structure for broken rock mass in mines with the patent publication number CN218265971U includes an advanced support system, a primary support system, and a secondary support system; the advanced support system passes through the upper end of the tunnel face and extends obliquely upward into the roof surrounding rock of the roadway for supporting the tunnel face; the primary support system includes an internal support structure arranged on the surfaces of the roadway roof and two sides and a surrounding rock support structure extending into the surrounding rock of the roadway roof and two sides. The surrounding rock support structure includes a number of water swelling bolts and a number of resin bolts; a number of drainage swelling bolts and resin bolts are arranged in the surrounding rock of the roadway roof, and the water swelling bolts and resin bolts in each row are arranged at intervals; a number of rows of resin bolts are arranged in the surrounding rock of the two sides of the roadway. The utility model adopts a combined support structure of an advanced support system, a primary support system, and a secondary support system, improves the quality of the support project, can effectively control the deformation of the roadway surrounding rock, and ensures the safety of roadway construction.

[0004] In the process of implementing the above scheme, it is found that the following problems in the prior art have not been well solved: during the tunnel boring process, the cross-section of the tunnel is often circular, and the support devices in the prior art often cannot effectively fit on the inner wall of the tunnel, and the bolt support method will further accelerate the fragmentation of the broken rock mass, resulting in a reduction in the firmness of the support. Therefore, it is urgent to design a support device for broken rock mass to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a support device for broken rock mass to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A support device for broken rock mass, comprising:

[0008] An annular support frame, the annular support frame is arranged inside the tunnel roadway;

[0009] The first reinforcing plate, the first reinforcing plates are annularly distributed at equal intervals on the inner wall of the annular support frame, and a reset assembly is arranged between one side of each first reinforcing plate and the inner wall of the annular support frame;

[0010] The second reinforcing plate, the second reinforcing plates are annularly distributed at equal intervals on the inner wall of the annular support frame, and the positions of the second reinforcing plates are staggered with those of the first reinforcing plates;

[0011] An installation groove is formed on one side of each second reinforcing plate, and a rack seat is fixed at the middle position of one side of the inner wall of the installation groove. A plurality of installation shafts are rotatably connected to the annular support frame at equal intervals, and a gear column is fixedly installed at the middle position of each installation shaft. The gear column meshes with the rack seat, and the length of the gear column is the same as that of the installation groove. A same rotation mechanism is arranged on the gear columns.

[0012] Further, the rotation mechanism includes bearing sleeves fixedly installed on both sides of the inner wall of the annular support frame, and a rotating ring is installed on the outer wall of each bearing sleeve. A plurality of tooth grooves are formed in the rotating ring at equal intervals, and the tooth grooves mesh with the gear columns. Connecting shafts are fixed at both ends of two of the installation shafts, and a gear disc is installed on the outer wall of each connecting shaft. Two hydraulic cylinders are fixedly installed on both sides of the annular support frame, and a rack plate is fixedly installed at the piston end of each hydraulic cylinder. The rack plate meshes with the gear disc.

[0013] Further, docking ports penetrating through the second reinforcing plate are formed in the inner walls at both ends of the installation groove, and the positions of the docking ports correspond to those of the installation shafts. The width of the docking port is equal to or greater than the diameter of the installation shaft.

[0014] Further, a limiting groove is formed at one end of each rack seat, and limiting plates are fixedly installed on the inner wall of the annular support frame at equal intervals. The limiting plates are inserted into the limiting grooves.

[0015] Further, the reset assembly includes a plurality of guiding holes formed in the first reinforcing plate, and guiding columns inserted into the guiding holes are fixedly installed on the inner wall of the annular support frame. The orientations of the guiding columns and the guiding holes are flush with the moving direction of the first reinforcing plate. A spring sleeved on the outer wall of the guiding column is fixed between one side of the first reinforcing plate and the inner wall of the annular support frame.

[0016] Further, fixing seats are fixedly installed at the bottom of the outer walls on both sides of the annular support frame at equal intervals, and moving wheels are installed at the bottom of each fixing seat. The bottoms of the moving wheels are in contact with the inner wall of the tunnel roadway.

[0017] Further, the outer walls at both ends of the second reinforcing plate and the outer walls at both ends of the first reinforcing plate are designed to be in a mutually fitting inclined plane shape. The first reinforcing plate and the second reinforcing plate are integrally in a cylindrical shape and are in contact with the inner wall of the tunnel roadway.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the present utility model, through the provided rotating mechanism, mounting shaft, gear column, rack seat, first reinforcing plate, second reinforcing plate and reset assembly, the mounting shaft and gear column can be driven to rotate under the driving action of the rotating mechanism, and the rack seat and second reinforcing plate can be driven to move in cooperation with the meshing action between the gear column and the rack seat, so that the first reinforcing plate can be unfolded synchronously under the extrusion action of the second reinforcing plate, enabling the first reinforcing plate and the second reinforcing plate to have the function of being conveniently telescopically adjusted, facilitating the attachment of the first reinforcing plate and the second reinforcing plate to the tunnel roadway, realizing the support of the broken rock mass area of the circular tunnel roadway, replacing the operation mode of using bolt support for the broken rock mass in the prior art, and improving the firmness performance of the entire support device;

[0020] In the present utility model, through the provided annular support frame and moving wheels, the entire support device can be pushed to move when the first reinforcing plate and the second reinforcing plate contract, facilitating the change of the position of the entire support device in the tunnel roadway and realizing the support of the broken rock mass in different areas of the tunnel roadway. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall sectional view of a broken rock mass support device.

[0022] Figure 2 It is a three-dimensional view of the annular support frame and the first reinforcing plate of a broken rock mass support device.

[0023] Figure 3 For Figure 2 Cross-sectional schematic diagram.

[0024] Figure 4 It is a schematic diagram of the rotating circle and tooth groove structure of a broken rock mass support device.

[0025] Figure 5 It is a schematic diagram of the docking port and limiting groove structure of a broken rock mass support device.

[0026] Figure 6 It is a schematic diagram of the first reinforcing plate and the second reinforcing plate of a broken rock mass support device.

[0027] In the figure: 1, tunnel roadway; 2, annular support frame; 3, fixed seat; 4, moving wheel; 5, first reinforcing plate; 6, second reinforcing plate; 7, hydraulic cylinder; 8, rack plate; 9, gear disc; 10, guide hole; 11, mounting shaft; 12, mounting groove; 13, guide post; 14, spring; 15, rack seat; 16, gear column; 17, limiting plate; 18, rotating circle; 19, bearing sleeve; 20, tooth groove; 21, docking port; 22, limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0029] Please refer to Figures 1-6 , in the embodiments of the present utility model, a support device for fractured rock masses includes:

[0030] An annular support frame 2, which is arranged inside the tunnel roadway 1;

[0031] The first reinforcement plate 5 is evenly distributed in a ring shape on the inner wall of the annular support frame 2. A reset assembly is arranged between one side of the first reinforcement plate 5 and the inner wall of the annular support frame 2. The reset assembly includes a plurality of guide holes 10 opened on the first reinforcement plate 5, and a guide post 13 inserted into the guide hole 10 is fixed on the inner wall of the annular support frame 2. The orientations of the guide post 13 and the guide hole 10 are flush with the moving direction of the first reinforcement plate 5. A spring 14 sleeved on the outer wall of the guide post 13 is fixed between one side of the first reinforcement plate 5 and the inner wall of the annular support frame 2. The telescopic performance of the spring 14 can enable the first reinforcement plate 5 to be reset synchronously when the second reinforcement plate 6 is reset;

[0032] The second reinforcement plate 6 is evenly distributed in a ring shape on the inner wall of the annular support frame 2. The position of the second reinforcement plate 6 intersects with the position of the first reinforcement plate 5. The outer walls at both ends of the second reinforcement plate 6 and the outer walls at both ends of the first reinforcement plate 5 are designed to be in a mutually fitting inclined surface shape. The first reinforcement plate 5 and the second reinforcement plate 6 are integrally in a cylindrical shape and fit on the inner wall of the tunnel roadway 1;

[0033] On one side of the second reinforcement plate 6, installation grooves 12 are formed, and a rack seat 15 is fixedly installed at the middle position of one side of the inner wall of the installation groove 12. A plurality of equally spaced installation shafts 11 are rotatably connected to the annular support frame 2, and a gear column 16 is fixedly installed at the middle position of each installation shaft 11. The gear column 16 meshes with the rack seat 15. The length of the gear column 16 is the same as the length of the installation groove 12. A same rotation mechanism is arranged on the gear column 16. The rotation mechanism includes bearing sleeves 19 fixedly installed on both sides of the inner wall of the annular support frame 2, and a rotating ring 18 is installed on the outer wall of each bearing sleeve 19. A plurality of equally spaced tooth grooves 20 are formed in the rotating ring 18. The tooth grooves 20 mesh with the gear column 16. Connecting shafts are fixedly installed at both ends of two of the installation shafts 11, and a gear disc 9 is installed on the outer wall of each connecting shaft. Two hydraulic cylinders 7 are fixedly installed on both sides of the annular support frame 2, and a rack plate 8 is fixedly installed at the piston end of each hydraulic cylinder 7. The rack plate 8 meshes with the gear disc 9. It can drive the installation shaft 11 and the gear column 16 to rotate under the driving action of the rotation mechanism, drive the rack seat 15 and the second reinforcement plate 6 to move, and thus synchronously unfold the first reinforcement plate 5 under the extrusion action of the second reinforcement plate 6, so that the first reinforcement plate 5 and the second reinforcement plate 6 have the function of being conveniently telescopically adjusted, and are convenient for attaching the first reinforcement plate 5 and the second reinforcement plate 6 to the tunnel roadway 1, realizing the support for the broken rock mass area of the circular tunnel roadway 1 and improving the firmness performance of the whole support device.

[0034] Specifically, docking openings 21 penetrating through the second reinforcement plate 6 are formed in the inner walls at both ends of the installation groove 12, and the positions of the docking openings 21 correspond to the positions of the installation shafts 11. The width of the docking openings 21 is equal to or greater than the diameter of the installation shafts 11. The function of the docking openings 21 is to prevent the installation shafts 11 from blocking the movement of the second reinforcement plate 6.

[0035] Specifically, a limiting groove 22 is formed at one end of each rack seat 15, and a plurality of equally spaced limiting plates 17 are fixedly installed on the inner wall of the annular support frame 2. The limiting plates 17 are inserted into the limiting grooves 22. The limiting function of the limiting plates 17 and the limiting grooves 22 ensures the smooth performance of the second reinforcement plate 6 during movement.

[0036] Specifically, a plurality of equally spaced fixing seats 3 are fixedly installed at the bottom of the outer walls on both sides of the annular support frame 2, and a moving wheel 4 is installed at the bottom of each fixing seat 3. The bottom of the moving wheel 4 is attached to the inner wall of the tunnel roadway 1. The movement of the moving wheels 4 is convenient for changing the position of the whole support device in the tunnel roadway 1, realizing the support for the broken rock mass of different areas of the tunnel roadway 1.

[0037] The working principle of the utility model is as follows: during use, the user changes the position of the entire support device in the tunnel roadway 1 through the action of the moving wheels 4, moves the entire support device to different broken rock mass areas of the tunnel roadway 1, and then adjusts the position of the rack plate 8 by using the hydraulic cylinder 7 in the rotating mechanism. The rotation of the mounting shaft 11 and the gear column 16 is driven by the meshing action between the rack plate 8 and the gear disc 9, and the movement of the rack seat 15 and the second reinforcement plate 6 is driven by the meshing action between the gear column 16 and the rack seat 15, so that the first reinforcement plate 5 is synchronously unfolded under the extrusion action of the second reinforcement plate 6, and the spring 14 in the reset assembly is also stretched, enabling the first reinforcement plate 5 and the second reinforcement plate 6 to fit in the tunnel roadway 1, thereby realizing the support for the broken rock mass area of the circular tunnel roadway 1.

[0038] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model.

Claims

1. A broken rock support device, characterized in that: include: An annular support frame (2), wherein the annular support frame (2) is arranged inside the tunnel (1); A first reinforcing plate (5), the first reinforcing plates (5) being distributed in an annular manner at equal distances on the inner wall of the annular support frame (2), and a reset component being arranged between one side of the first reinforcing plate (5) and the inner wall of the annular support frame (2); Second reinforcing plates (6), the second reinforcing plates (6) being distributed in an annular shape at equal distances on the inner wall of the annular support frame (2), and the position of the second reinforcing plates (6) being staggered with the position of the first reinforcing plates (5); A mounting groove (12) is provided on one side of the second reinforcing plate (6), and a rack seat (15) is fixed at a middle position on one side of the inner wall of the mounting groove (12); the annular support frame (2) is rotatably connected to mounting shafts (11) distributed at equal distances, and a gear column (16) is fixedly installed at a middle position of the mounting shaft (11); the gear column (16) is meshed with the rack seat (15), the length of the gear column (16) is the same as the length of the mounting groove (12), and the gear column (16) is provided with a same rotating mechanism.

2. A broken rock support device according to claim 1, characterized in that: The rotating mechanism comprises bearing sleeves (19) fixedly mounted on both sides of the inner wall of the annular support frame (2), and the outer wall of the bearing sleeves (19) is mounted with a rotating ring (18), and the rotating ring (18) is provided with multiple positions and tooth grooves (20) distributed at equal distances, and the tooth grooves (20) are meshed with the gear column (16), wherein the two ends of the two mounting shafts (11) are fixed with connecting shafts, and the outer walls of the connecting shafts are mounted with gear plates (9), and two hydraulic cylinders (7) are fixedly mounted on both sides of the annular support frame (2), and the piston ends of the hydraulic cylinders (7) are fixedly mounted with rack plates (8), and the rack plates (8) are meshed with the gear plates (9).

3. A broken rock support device according to claim 2, characterized in that: The inner walls at both ends of the installation groove (12) are provided with docking ports (21) penetrating the second reinforcing plate (6), and the position of the docking ports (21) corresponds to the position of the installation shaft (11), and the width of the docking ports (21) is equal to or greater than the diameter of the installation shaft (11).

4. A broken rock support device according to claim 3, characterized in that: One end of the rack seat (15) is provided with a limiting groove (22), and the inner wall of the annular support frame (2) is fixed with limiting plates (17) distributed at equal distances, and the limiting plates (17) are inserted into the limiting groove (22).

5. A broken rock support device according to claim 4, characterized in that: The reset assembly comprises a plurality of guide holes (10) formed on the first reinforcing plate (5), and a guide column (13) inserted into the guide hole (10) is fixed on the inner wall of the annular support frame (2), the orientation of the guide column (13) and the guide hole (10) are both flush with the movable direction of the first reinforcing plate (5), and a spring (14) sleeved on the outer wall of the guide column (13) is fixed on one side of the first reinforcing plate (5) and the inner wall of the annular support frame (2).

6. A broken rock support device according to claim 5, characterized in that: The bottom of the outer walls on both sides of the annular support frame (2) are fixed with fixed seats (3) distributed at equal distances, and the bottom of the fixed seats (3) is installed with moving wheels (4), and the bottom of the moving wheels (4) is in contact with the inner wall of the tunnel (1).

7. A broken rock support device according to claim 1, characterized in that: The outer walls at both ends of the second reinforcing plate (6) and the outer walls at both ends of the first reinforcing plate (5) are designed to fit into inclined planes; the first reinforcing plate (5) and the second reinforcing plate (6) are cylindrical as a whole and fit into the inner wall of the tunnel (1).

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