A constant-resistance large-deformation anchor cable supporting device for a coal mine tunnel

Abstract

The utility model discloses a kind of coal mine roadway constant resistance large deformation anchor cable supporting devices, belong to anchor cable supporting technical field, a kind of coal mine roadway constant resistance large deformation anchor cable supporting device, including four steel strands, four steel strands outer surface is slidably connected with constant resistance mechanism, constant resistance mechanism outside is slidably connected with supporting mechanism, it is cooperated through constant resistance mechanism and supporting mechanism, when using anchor cable to support coal mine roadway, can be according to the change of rock mass, adaptive adjustment is carried out, when the tension of steel strand is less than the constant resistance set, device is substantially no deformation, along with the deformation of rock mass increases, the tension of steel strand reaches the constant resistance set, compression pipe gradually enters constraint ring, when deformation reaches limit length, limiting plate and constraint ring contact, at this time, compression pipe all enters constraint ring, the tension of steel strand is constantly increased until steel strand breaks, adaptive yield pressure and prevent the function of rush can be realized, improve the practicality of device.

Description

Technical Field

[0001] This utility model relates to the field of anchor cable support technology, and more specifically, to an anchor cable support device for constant resistance and large deformation in coal mine roadways. Background Technology

[0002] Anchor cable support is a support method that combines anchor cables and metal mesh. It is a relatively new support technology in my country. The main purpose of anchor cable support is to support and stabilize structures by utilizing the pull-out strength of anchor cables, effectively reducing the tilting, settlement and vibration of structures, thereby improving the stability and safety of structures. In coal mining, anchor cable support achieves deep reinforcement by deep anchoring, compressing the surrounding rock, and improving its flexibility and integrity. It is widely used in coal mine roadways, traffic tunnels and rock and soil slopes.

[0003] Chinese Patent Announcement No. CN208619141U discloses an anchor cable bundle support device. This solution uses five anchor cables of different lengths in conjunction with a large tray. On the one hand, the anchor cables of different lengths are rooted in different rock strata, greatly increasing the anchorage length; on the other hand, the five anchor cables of unequal lengths act on a large tray to form a strong binding force, similar to the function of a cable-stayed bridge pier, increasing the preload of the anchor cables and greatly improving the support effect. Specifically, compared with traditional anchor cable reinforcement, this utility model increases the anchorage length of the anchor cables; the anchor cables of different lengths are rooted in different rock strata, ensuring the anchorage effect of the anchor cables; the five anchor cables of unequal lengths act on a large tray to form a strong binding force, which has a reinforcing effect on large-span tunnels, similar to the function of a cable-stayed bridge pier. However, in the specific implementation process, there are still the following defects: when the rock mass deforms during the anchor cable support process, the device cannot adaptively adjust and cannot play a role in preventing erosion.

[0004] Therefore, a constant resistance large deformation anchor cable support device for coal mine roadways is proposed to address the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a constant resistance large deformation anchor cable support device for coal mine roadways, which can realize the function of adaptive pressure relief and anti-impact.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A constant resistance large deformation anchor cable support device for coal mine roadways includes four steel strands, with a constant resistance mechanism slidably connected to the outer surfaces of the four steel strands, and a support mechanism slidably connected to the outside of the constant resistance mechanism.

[0010] Furthermore, the constant resistance mechanism includes a pilot tube, the upper end of which is fixedly connected to a compression tube, and the upper end of which is fixedly connected to a positioning component.

[0011] Furthermore, the positioning component includes a limiting plate, on the inner surface of which four positioning tubes are fixedly connected. The inner surfaces of the four positioning tubes are slidably connected to the outer surfaces of the four steel strands, and the outer surfaces of the four positioning tubes are jointly fixedly connected to a flange.

[0012] Furthermore, the support mechanism includes a support plate with a through hole at the upper end, a constraint ring fixedly connected to the upper end of the support plate, and four support components fixedly connected to the inner surface of the support plate.

[0013] Furthermore, the support assembly includes connecting pipes, the outer surfaces of the four connecting pipes are fixedly connected to the inner surface of the support plate, a connector is fixedly connected to the inner surface of the connecting pipe, a spring is fixedly connected to the connector, and a contact is fixedly connected to the lower end of the spring.

[0014] Furthermore, the inner surface of the constraint ring is slidably connected to the outer surface of the pilot guide.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This solution, through the cooperation of a constant resistance mechanism and a support mechanism, can adaptively adjust according to changes in the rock mass when using anchor cables to support coal mine roadways. When the tension of the steel strand is less than the set constant resistance, the device has virtually no deformation. As the deformation of the surrounding rock increases, the tension of the steel strand reaches the set constant resistance, and the compression tube gradually enters the constraint ring and generates resistance. When the deformation reaches the limit length, the limiting plate contacts the constraint ring, at which point the entire compression tube enters the constraint ring, and the tension of the steel strand continuously increases until the steel strand breaks. This improves the safety of coal mine roadway support and enhances the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the constant resistance mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the positioning component of this utility model;

[0021] Figure 4 This is a schematic diagram of the support mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the support component of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Steel strand; 2. Constant resistance mechanism; 21. Pilot tube; 22. Compression tube; 23. Positioning assembly; 231. Limiting plate; 232. Positioning tube; 233. Flange; 3. Support mechanism; 31. Support plate; 32. Perforation; 33. Constraint ring; 34. Support assembly; 341. Connecting tube; 342. Connector; 343. Spring; 344. Contact. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example:

[0029] Please see Figure 1-5A constant resistance large deformation anchor cable support device for coal mine roadways includes four steel strands 1, with a constant resistance mechanism 2 slidably connected to the outer surfaces of the four steel strands 1, and a support mechanism 3 slidably connected to the outside of the constant resistance mechanism 2.

[0030] This scheme uses an anchoring agent to fix four steel strands 1 in the rock mass, uses a support mechanism 3 to fix the wire mesh, and uses a constant resistance mechanism 2 to fix the four steel strands 1, which facilitates the adjustment of the tension value of the four steel strands 1. With the constant resistance mechanism 2 and the support mechanism 3 working together, the anchor cables can make adaptive adjustments when the rock mass deforms.

[0031] Please see Figure 2-3 The constant resistance mechanism 2 includes a pilot tube 21, a compression tube 22 fixedly connected to the upper end of the pilot tube 21, and a positioning component 23 fixedly connected to the upper end of the compression tube 22.

[0032] The positioning component 23 includes a limiting plate 231, with four positioning tubes 232 fixedly connected to the inner surface of the limiting plate 231. The inner surfaces of the four positioning tubes 232 are slidably connected to the outer surfaces of the four steel strands 1 respectively, and a flange 233 is fixedly connected to the outer surfaces of the four positioning tubes 232.

[0033] This solution connects the compression pipe 22 and four positioning pipes 232 together through the limiting plate 231. The four positioning pipes 232 and the flange 233 work together to fix the four steel strands 1. When the rock mass deforms, the tension of the four steel strands 1 will change, which will move the flange 233 towards the rock mass. At this time, the compression pipe 22 will also move towards the rock mass and deform under the push of the limiting plate 231, thus actively adapting.

[0034] Please see Figure 4-5 The support mechanism 3 includes a support plate 31, with a through hole 32 at the upper end of the support plate 31. A constraint ring 33 is fixedly connected to the upper end of the support plate 31. The inner surface of the constraint ring 33 is slidably connected to the outer surface of the pilot tube 21. Four support components 34 are fixedly connected to the inner surface of the support plate 31.

[0035] The support assembly 34 includes connecting pipes 341. The outer surfaces of the four connecting pipes 341 are fixedly connected to the inner surface of the support plate 31. Connectors 342 are fixedly connected to the inner surface of the connecting pipes 341. Springs 343 are fixedly connected to the connectors 342. A contact 344 is fixedly connected to the lower end of the springs 343.

[0036] This scheme supports the coal mine roadway by placing the support plate 31 against the wire mesh, allowing the four contacts 344 to rest against the roadway wall. When the tension of the steel strand 1 changes, the support plate 31 will move towards the roadway wall. At this time, the four springs 343 will contract under the action of the support plate 31, achieving the first adaptation. When the tension of the steel strand 1 continues to change, when the four springs 343 contract to their limit, the constraint ring 33 will cooperate with the constant resistance mechanism 2 to continue adaptive adjustment.

[0037] Working principle: When anchor cables and wire mesh are needed to support the walls of coal mine roadways, firstly, anchor holes are drilled in the wall using tools. Four steel strands 1 are then fixed to the rock mass using anchoring agent. Next, the support plate 31 is placed against the wire mesh, allowing the four contacts 344 to rest against the roadway wall. The pilot guide 21 is inserted into the restraint ring 33. The four steel strands 1 are then passed through the perforation 32, pilot guide 21, and compression pipe 22. Tools are used to pull the four steel strands 1 outwards. The combined action of the four positioning pipes 232 and flanges 233 secures the other ends of the four steel strands 1, ensuring that the overall tension of the four steel strands 1 is less than the resistance between the compression pipe 22 and the restraint ring 33. When the rock mass deforms, the four... The tension of the steel strand 1 will increase, causing the pallet 31 to move towards the tunnel wall. At this time, the four springs 343 will contract under the action of the pallet 31 to achieve the first adaptation. When the tension of the steel strand 1 continues to change, when the four springs 343 contract to their limit, the four steel strands 1 will pull the flange 233 towards the wall. At this time, the compression pipe 22 will gradually enter the constraint ring 33 under the action of the limiting plate 231. The resistance generated by the compression pipe 22 entering the constraint ring 33 will eliminate the resistance of the four steel strands 1. As the tension increases, the compression pipe 22 will completely enter the constraint ring 33. At this time, the limiting plate 231 will contact the constraint ring 33, and the constant resistance component will be stuck and no longer deformed until the four steel strands 1 break.

[0038] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A constant resistance large deformation anchor cable support device for coal mine roadways, comprising four steel strands (1), characterized in that: The outer surfaces of the four steel strands (1) are slidably connected to a constant resistance mechanism (2), and the constant resistance mechanism (2) is slidably connected to a support mechanism (3). The constant resistance mechanism (2) includes a pilot tube (21), a compression tube (22) is fixedly connected to the upper end of the pilot tube (21), and a positioning component (23) is fixedly connected to the upper end of the compression tube (22). The positioning component (23) includes a limiting plate (231), and four positioning tubes (232) are fixedly connected to the inner surface of the limiting plate (231). The inner surfaces of the four positioning tubes (232) are slidably connected to the outer surfaces of the four steel strands (1), and a flange (233) is fixedly connected to the outer surfaces of the four positioning tubes (232). The support mechanism (3) includes a support plate (31), a through hole (32) is provided at the upper end of the support plate (31), a constraint ring (33) is fixedly connected to the upper end of the support plate (31), and four support components (34) are fixedly connected to the inner surface of the support plate (31). The support assembly (34) includes connecting pipes (341), the outer surfaces of the four connecting pipes (341) are fixedly connected to the inner surface of the support plate (31), the inner surface of the connecting pipes (341) is fixedly connected to a connector (342), the connector (342) is fixedly connected to a spring (343), and the lower end of the spring (343) is fixedly connected to a contact (344).

2. The constant resistance large deformation anchor cable support device for coal mine roadways according to claim 1, characterized in that: The inner surface of the constraint ring (33) is slidably connected to the outer surface of the pilot tube (21).

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