Sectional anchoring buffer device for anchor rod

Abstract

The utility model discloses an anchor rod subsection anchoring buffer device which comprises an anchor rod assembly, a sleeve structure, surrounding rock and anchoring materials, the sleeve structure is located at the end of the anchor rod assembly, and the anchor rod assembly and the sleeve structure are located in an anchor hole in the center of the surrounding rock. Segmented anchoring of the anchor rod is achieved in a solid anchoring mode and a liquid anchoring mode, the buffering component is arranged in the device, the good anchoring effect can be achieved in a roadway with large rock burst, the situation that the anchor rod is broken to hurt people is reduced, and the device is easy and convenient to install and high in practicability.

Description

Technical Field

[0001] The utility model relates to the field of mine tunnel support, and more specifically, to a segmented anchoring buffer device for an anchor rod. Background Art

[0002] In recent years, with the depletion of shallow coal resources, many coal mines have entered the deep development stage. The high ground stress, impact mine pressure and complex geological environment in deep strata have a great impact on the exploitation of coal resources. Anchor rods are widely used in deep tunnel support due to their advantages such as simple construction and good support. However, the impact mine pressure in deep tunnels causes stress concentration in anchor rods, and anchor rods are prone to breakage. The traditional grouting full-length anchor rod support has low ductility, and the support effect is not ideal in tunnels with large impact mine pressure. Therefore, it is of great significance to develop a device that can anchor in sections and play a buffering role. A free section is left between the anchoring sections of the anchor rod to make full use of the ductility of the anchor rod, and a buffer component is set in the device for tunnels with large impact mine pressure, which can achieve a better anchoring effect and reduce the occurrence of anchor loss and injury. However, due to the limitation of anchoring devices, the current roadway anchoring mostly adopts a single type of anchoring method, resin-based or cement-based. It is not easy to anchor the anchor rod in sections using the resin-based anchoring method, while the anchor rod in sections using cement-based anchoring mostly adopts grouting, which cannot be anchored in sections well. Moreover, the current grouting anchor rods mostly adopt hollow anchor rods, which have a large loss of anchor rod strength. The development of an anchor rod segmented anchoring buffer device has high practical value.

[0003] In the prior art, the anchoring force detection device can refer to application numbers CN202310713073.4 and CN202310755034.0, which have the following shortcomings: the hollow anchor rod is used for grouting, and the anchor rod strength loss is large; application number CN202311234454.0 has the following shortcomings: the anchor rod cannot be anchored in sections. In view of the above and / or the problems existing in the prior art, the present invention provides an anchor rod segmented anchoring device, which uses two anchoring methods, solid and liquid, to anchor the anchor rod in sections. The device has a simple structure and a simple installation process. It has strong practicality and can effectively solve the problems raised in the above background technology. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the anchor rod can be anchored in sections, and the influence of the impact of the rock pressure on the anchor rod is reduced by setting a buffer component. The utility model provides an anchor rod segmented anchoring buffer device, including an anchor rod assembly, a sleeve structure sleeved outside the anchor rod assembly, surrounding rock, the anchor rod assembly and the sleeve structure are anchored in the central anchor hole of the surrounding rock, and the anchoring material filled in the gap between the surrounding rock and the anchor rod assembly includes a solid anchoring agent and an anchoring slurry.

[0005] Furthermore, the anchor rod assembly, the disc head is welded to the front end of the anchor rod, is a flat cylinder, two grooves are opened on the side of the disc head, the blocking iron column and the small spring are placed in the grooves, the rubber retaining ring is equidistantly sleeved on the front, middle and rear positions of the anchor rod, the rubber retaining ring is provided with grouting holes, the plug is sealed in the grouting hole of the rubber retaining ring located at the tail of the anchor rod, in order to prevent cement slurry from escaping from the grouting hole, the grouting hole has a small diameter and is only for the rope to pass through.

[0006] Preferably, the anchor rod is a threaded steel anchor rod, the blocking iron column and the small spring are made of ordinary steel, and the initial state of the small spring is a partially compressed state.

[0007] Furthermore, the sleeve structure has an open front end and is not closed, and a closed rear end and is provided with an anchor hole. A plurality of small holes are opened on the front end wall of the sleeve wall, and a clamping hole is provided at the rear end, and the transverse ribs are uniformly welded on the outer wall. A large spring is placed in the sleeve structure, and a rubber ring is sleeved on the clamping hole of the sleeve wall. One end of the rope is tied to the rubber ring, and the other end passes through the grouting holes of the rubber retaining ring at the front, middle, and rear positions of the anchor rod in sequence.

[0008] Preferably, the rubber ring is made of a high molecular weight polypropylene material with good sealing performance and carbonization resistance, and the rope is a tensile and wear-resistant hemp rope.

[0009] Furthermore, the anchoring material includes a solid anchoring agent and an anchoring slurry. The resin and the curing agent of the solid anchoring agent are packaged separately and are only mixed and placed in the sleeve when anchoring.

[0010] Preferably, the solid anchoring agent is made of high-performance anchoring agent material produced by Anhui Meiya Hi-Tech, which has high strength and good durability.

[0011] Beneficial effects of the utility model:

[0012] The utility model is suitable for tunnels with large impact mine pressure and reduces the breakage of anchor rods due to stress concentration.

[0013] The utility model adopts two anchoring methods, solid and liquid, to anchor the anchor rod in sections, leaving a free section between the anchoring sections of the anchor rod, making full use of the ductility of the anchor rod, and having a better supporting effect on the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1A schematic diagram of the overall structure of an anchor rod segmented anchoring buffer device provided by the utility model;

[0016] Figure 2 A sleeve cross-sectional view of an anchor rod segmented anchoring buffer device provided by the utility model;

[0017] Figure 3 A schematic diagram of the structure of an anchor rod assembly of an anchor rod segmented anchoring buffer device provided by the utility model;

[0018] Figure 4 A schematic diagram of a rubber ring blocking and blocking iron column of an anchor rod segmented anchoring buffer device provided by the utility model;

[0019] Figure 5 A schematic diagram of an anchor rod assembly and a sleeve structure combination of an anchor rod segmented anchoring buffer device provided by the utility model;

[0020] Figure 6 A schematic diagram of the buffering device after the surrounding rock breaks of an anchor rod segmented anchoring buffer device provided by the utility model. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] Furthermore, the “embodiment” referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention.

[0025] Example:

[0026] See also Figure 1-6The utility model provides an anchor rod segmented anchoring buffer device, including an anchor rod assembly 100, a sleeve structure 200 sleeved on the outside of the anchor rod assembly 100, and surrounding rock 300. The anchor rod assembly 100 and the sleeve structure 200 are anchored in the central anchor hole of the surrounding rock 300, and the anchoring material 400 filled in the gap between the surrounding rock 300 and the anchor rod assembly 100 includes a solid anchoring agent 400-a and an anchoring slurry 400-b.

[0027] During the use of this solution, the operator places the large spring 202 in the sleeve structure 200 in advance, and the tail of the anchor rod 101 passes through the large spring 202 and passes through the anchor rod hole 207 at the bottom of the sleeve structure 200. The blocking iron column 103 of the disc head 102 is clamped in the clamping hole 208 at the rear end of the sleeve wall 201. Outside the sleeve wall 201, a rubber ring 203 is used to press the blocking iron column 103 to make the small spring 104 in a compressed state. Then, several rubber retaining rings 105 are installed at equal intervals in the front, middle and rear positions of the anchor rod 101 in sequence, one end of the rope 204 is tied to the rubber ring 203, and the other end passes through the grouting holes 107 of several rubber retaining rings 105 in sequence, and then the plug 106 is used to seal the grouting hole 107 of the outermost rubber retaining ring 105, and finally the mixed resin and curing agent of the solid anchor 400-a are placed at the front end of the sleeve structure 200.

[0028] After the above structure is installed, the anchor rod assembly 100 is sent to the anchoring position, and the rubber ring 203 is pulled by the rope 204. After the blocking iron column 103 pops out, the compressed large spring 202 pushes the anchor rod 101 to push the solid anchoring agent 400-a out through the small hole 205 of the sleeve wall 201. In addition, the anchor slurry 400-b is poured into the end of the surrounding rock through the grouting equipment to complete the front and rear end anchoring of the entire anchor rod.

[0029] During the use of this solution, this device can be easily disassembled and assembled, saving time and effort, achieving the stability and safety of the overall device, and avoiding threats to the health of operators due to improper use by operators. Among them, the design of the transverse rib 206 of the sleeve structure 200 greatly reduces the sliding of the anchor assembly 100. After the solid anchoring agent 400-a solidifies and is stressed, the friction of the structure is enhanced, which improves the anchoring force. In addition, the use of the anchor slurry 400-b effectively avoids the pulling out of the anchor 101 when facing huge mine pressure. The anchor 101 is anchored in sections by using both solid and liquid anchoring methods, leaving a free section between the anchoring sections of the anchor 101, making full use of the ductility of the anchor 101, reducing the breakage of the anchor 101 due to stress concentration, and having a better support effect on the tunnel.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An anchor rod segmented anchoring buffer device, characterized in that: include, An anchor rod assembly (100), a sleeve structure (200) sleeved on the outside of the anchor rod assembly (100), surrounding rock (300), the anchor rod assembly (100) and the sleeve structure (200) anchored in the central anchor hole of the surrounding rock (300), and an anchoring material (400) filled in the gap between the surrounding rock (300) and the anchor rod assembly (100), including a solid anchoring agent (400-a) and an anchoring slurry (400-b).

2. The anchor rod segmented anchoring buffer device according to claim 1, characterized in that: The anchor rod assembly (100) comprises a disc head (102) welded to the front end of the anchor rod (101), two grooves are formed on the side of the disc head (102), a blocking iron column (103) and a small spring (104) are placed in the grooves, a rubber retaining ring (105) is equidistantly sleeved on the front, middle and rear positions of the anchor rod (101), a grouting hole (107) is formed on the rubber retaining ring (105), and a plug (106) is sealed in the grouting hole (107) of the rubber retaining ring (105) located at the rear end of the anchor rod (101).

3. The anchor rod segmented anchoring buffer device according to claim 1, characterized in that: The sleeve structure (200) has a front end opening that is not closed, and a rear end that is closed and provided with an anchor hole (207). A plurality of small holes (205) are opened on the front end wall of the sleeve wall (201), and a clamping hole (208) is provided at the rear end. The transverse ribs (206) are uniformly welded on the outer wall of the sleeve wall (201). The large spring (202) is placed in the sleeve structure (200), and the rubber ring (203) is sleeved on the clamping hole (208) of the sleeve wall (201). One end of the rope (204) is tied to the rubber ring (203), and the other end passes through the grouting holes (107) of the rubber retaining ring (105) at the front, middle and rear positions of the anchor (101) in sequence.

4. The anchor rod segmented anchoring buffer device according to claim 1, characterized in that: The anchoring material (400) includes a solid anchoring agent (400-a) located in a sleeve structure (200), and an anchoring slurry (400-b) poured into the end of the surrounding rock.

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