Mining anchor rod with expanded end part

Abstract

The utility model discloses a mining end expansion type anchor rod, which belongs to the technical field of supporting anchor rods and comprises an anchor rod piece, a limiting structure is arranged below the anchor rod piece, and a push-out structure is erected at the top end of the limiting structure. According to the mining end expansion type anchor rod, by arranging a push-out structure and an extension structure, an insertion rod is pushed to move, so that the insertion rod drives a connecting strip to turn to unfold an expansion strip, a conical tip of the insertion rod punctures a resin cartridge or a quick-hardening cement cartridge, a drilled hole is filled with the resin cartridge or the quick-hardening cement cartridge, and after forming is conducted and the expansion strip is unfolded and shaped, the expansion strip is fixed; the shear strength of the end of the anchor rod piece and the pulling resistance of the anchor rod piece can be enhanced, under the condition that the end bearing capacity between an anchor head and rock soil is fully utilized, the length of the anchor rod can be greatly shortened, the distance between the anchor rod pieces can be increased, the engineering cost can be effectively reduced, and the effective use space of an underground building can be improved. And a conical part is formed after the extension structure is folded, so that the anchor rod piece can be conveniently put into a drill hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of supporting anchor rods, in particular to an end-expanding anchor rod for mining. Background Art

[0002] Anchor support is a commonly used support method in the reinforcement of surrounding rock of coal mine tunnels and chambers. Compared with other support methods, it has the advantages of simple support process, significant support effect, low support cost, convenient transportation and construction, etc. However, due to the relatively simple end face structure of ordinary anchors, the bonding strength between the anchor and the anchoring agent contact surface is relatively small. In addition, in order to increase the friction force, a convex structure is generally set on the surface of the anchor, but it will cause greater friction and more laborious when the anchor is inserted into the hole. Therefore, it is of great significance to study a new end-expanded anchor for mining to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides an end-expanded anchor rod for mining, which solves the problem that the bonding strength on the contact surface between the anchor rod and the anchoring agent is relatively small due to the relatively simple end face structure of the ordinary anchor rod, and since a protruding structure is generally provided on the surface of the anchor rod to increase the friction, it will cause greater friction and more effort when the anchor rod is inserted into the hole.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an end-expandable anchor rod for mining, comprising an anchor rod member, a limiting structure is arranged below the anchor rod member, a push-out structure is arranged at the top of the limiting structure, the push-out structure is arranged between a plurality of groups of laterally arranged reinforcement columns, the top of the push-out structure passes through the anchor rod member and is connected to an adjustable conical portion.

[0007] As a further solution of the utility model: the limiting structure includes a nut, the inner thread of the nut is connected to a screw rod, and the bottom end of the screw rod is fixedly connected to a handle.

[0008] As a further solution of the utility model: the pushing structure includes an insertion rod, the insertion rod passes through the top of the anchor rod, the bottom end of the insertion rod overlaps the screw rod, and the top end of the screw rod is provided with a cone tip.

[0009] As a further solution of the utility model: a plurality of conical heads are fixedly connected to the insertion rod, and the conical heads are overlapped with each group of reinforcement columns.

[0010] As a further solution of the utility model: the number of the reinforcement columns in each group is multiple, the multiple reinforcement columns are connected by multiple elastic bands, and the reinforcement columns are inserted and slid in the anchor rod.

[0011] As a further solution of the utility model: the adjustable conical portion is formed by enclosing a plurality of extension structures, the extension structure includes an expansion strip and a connecting strip, both ends of the connecting strip are hinged to two fixed blocks through pins, and the two fixed blocks are fixedly connected to the insertion rod and the expansion strip respectively.

[0012] As a further solution of the utility model: the lower part of the expansion strip is hinged to two support members through a pin, and the support members are fixedly connected to the top of the anchor member.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The end-expandable anchor for mining is provided with a push-out structure and an extension structure. By pushing the insertion rod to move, the insertion rod drives the connecting strip to turn and expand the expansion strip, and the cone tip of the insertion rod pierces the resin roll or the quick-hardening cement roll to fill the drill hole. After forming, the expansion strip is expanded and shaped, which can enhance the shear strength of the end of the anchor and the pull-out resistance of the anchor. Under the condition of fully utilizing the end bearing capacity between the anchor head and the rock and soil, the length of the anchor can be greatly shortened and the spacing between the anchors can be expanded, which can effectively reduce the project cost and increase the effective use space of underground buildings. The extension structure is folded to form a tapered part, which is convenient for the anchor to be put into the drill hole.

[0016] 2. The end-expandable anchor for mining is provided with a reinforcement column and an elastic band. The reinforcement columns are connected by the elastic band. After the elastic band is tightened, the reinforcement column can be driven to retract into the anchor member, thereby avoiding the reinforcement column protruding and increasing the difficulty of inserting the anchor member into the drill hole. After the reinforcement column is squeezed out by the conical head and is fixed by the anchor agent, the pull-out and shear strengths of the anchor member can be greatly enhanced, thereby improving the stability of the anchor member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the construction process of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the anchor rod of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the anchor rod of the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the adjustable conical part of the utility model;

[0021] Figure 5 A schematic diagram of a three-dimensional structure is provided for the utility model;

[0022] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a three-dimensional insertion rod of the utility model;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the reinforcement column of the utility model;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the extended structure of the utility model;

[0025] In the figure: 1. anchor rod; 2. limiting structure; 21. nut; 22. screw; 23. handle; 3. push-out structure; 31. insertion rod; 32. conical head; 33. conical tip; 4. reinforcement column; 5. adjustable conical part; 51. extension structure; 511. expansion strip; 512. support member; 513. connecting strip; 514. fixing block; 6. elastic band. DETAILED DESCRIPTION

[0026] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0027] like Figure 1-8As shown, the utility model provides a technical solution: an end-expandable anchor rod for mining, comprising an anchor rod 1, a limiting structure 2 is arranged below the anchor rod 1, the limiting structure 2 comprises a nut 21, a screw rod 22 is connected to the inner thread of the nut 21, a handle 23 is fixedly connected to the bottom end of the screw rod 22, the handle 23 is used as a force application point, so that the screw rod 22 can be rotated to move, so that the screw rod 22 can push the insertion rod 31 to move, and the threads between the nut 21 and the screw rod 22 are locked, which can prevent the movement of the insertion rod 31, and a push-out structure 3 is set at the top of the limiting structure 2, and the push-out structure 3 comprises an insertion rod 31, and the insertion rod 31 passes through the top of the anchor rod 1, and the bottom end of the insertion rod 31 The screw rod 22 is overlapped, and a conical tip 33 is provided at the top of the screw rod 22. The tip of the conical tip 33 can smoothly pierce the resin roll or the quick-hardening cement roll, so as to facilitate the release of the anchor to fill the borehole. A plurality of conical heads 32 are fixedly connected to the insertion rod 31. The conical surface of the conical head 32 can realize the movement of the extruded reinforcement column 4. The conical head 32 is overlapped with each group of reinforcement columns 4. The number of reinforcement columns 4 in each group is multiple. The multiple reinforcement columns 4 are connected by a plurality of elastic bands 6. The reinforcement columns 4 are connected by the elastic bands 6. After the elastic bands 6 are tightened, the reinforcement columns 4 can be driven to retract into the anchor member 1, thereby preventing the reinforcement columns 4 from protruding and increasing the insertion of the anchor member 1 into the borehole. The difficulty is reduced, and after the conical head 32 squeezes the reinforcement column 4 to protrude, the reinforcement column 4 is shaped by the anchoring agent, which can greatly enhance the pull-out and shear strength of the anchor member 1, improve the stability of the anchor member 1, and the reinforcement column 4 is inserted and slid in the anchor member 1, and the push-out structure 3 is erected between multiple groups of transversely arranged reinforcement columns 4. The top of the push-out structure 3 passes through the anchor member 1 and is connected to the adjustable conical portion 5. The adjustable conical portion 5 is formed by enclosing multiple extension structures 51. The extension structures 51 are enclosed to form the adjustable conical portion 5, so that the conical portion can assist the anchor member 1 to be smoothly inserted into the drill hole. The extension structure 51 includes an expansion strip 511 and a connecting strip 513. Both ends of the connecting strip 513 are hinged to the two fixing blocks 514 through pins. The connecting strip 513 can move through the pins so that the connecting strip 513 can be smoothly unfolded. The two fixing blocks 514 are fixedly connected to the insertion rod 31 and the unfolding strip 511 respectively. The bottom of the unfolding strip 511 is hinged to the two supporting members 512 through the pins. The connecting strip 513 can be unfolded by moving the insertion rod 31, so that the connecting strip 513 unfolds the unfolding strip 511. After the unfolding strip 511 and the connecting strip 513 are unfolded and fixed by the anchor agent, the shear strength of the end of the anchor and the pull-out resistance of the anchor member 1 can be enhanced. The supporting member 512 is fixedly connected to the top of the anchor member 1.

[0028] The working principle of the utility model is as follows: after the anchor rod 1 is inserted into the drill hole, the handle 23 is rotated to mobilize the screw rod 22 to move upward, so that the screw rod 22 pushes the insertion rod 31 to move, and the insertion rod 31 drives the conical head 32 to move, and the conical head 32 squeezes the reinforcement column 4 to extend the anchor rod 1, and the movement of the insertion rod 31 drives the connecting strip 513 to unfold, so that the connecting strip 513 drives the unfolding strip 511 to unfold, and the cone tip 33 of the insertion rod 31 pierces the resin medicine roll or the fast-hardening cement medicine roll to fill the drill hole, and the positioning of the anchor rod 1 is completed after forming.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A mining end-expandable anchor bolt, comprising an anchor bolt member (1), characterized in that: A limiting structure (2) is provided below the anchor rod (1), a push-out structure (3) is provided at the top end of the limiting structure (2), and the push-out structure (3) is provided between a plurality of groups of transversely arranged reinforcement columns (4), the top end of the push-out structure (3) passes through the anchor rod (1) and is connected to the adjustable conical portion (5).

2. The end-expanded anchor bolt for mining according to claim 1, characterized in that: The limiting structure (2) comprises a nut (21), the internal thread of the nut (21) is connected to a screw rod (22), and the bottom end of the screw rod (22) is fixedly connected to a handle (23).

3. The end-expanded anchor bolt for mining according to claim 2, characterized in that: The pushing-out structure (3) comprises an insertion rod (31), the insertion rod (31) passes through the top of the anchor rod (1), the bottom end of the insertion rod (31) overlaps the screw rod (22), and the top end of the screw rod (22) is provided with a cone tip (33).

4. The end-expanded anchor bolt for mining according to claim 3, characterized in that: A plurality of conical heads (32) are fixedly connected to the insertion rod (31), and the conical heads (32) are overlapped with each group of reinforcement columns (4).

5. The end-expanded anchor bolt for mining according to claim 1, characterized in that: The number of the reinforcement columns (4) in each group is multiple, and the multiple reinforcement columns (4) are connected by multiple elastic bands (6), and the reinforcement columns (4) are inserted and slid in the anchor rod (1).

6. The end-expanded anchor bolt for mining according to claim 3, characterized in that: The adjustable conical portion (5) is formed by enclosing a plurality of extension structures (51), wherein the extension structure (51) comprises an expansion strip (511) and a connecting strip (513), wherein both ends of the connecting strip (513) are respectively hinged to two fixing blocks (514) via a pin, and the two fixing blocks (514) are respectively fixedly connected to the insertion rod (31) and the expansion strip (511).

7. The end-expanded anchor bolt for mining according to claim 6, characterized in that: The lower part of the expansion strip (511) is hinged to two support members (512) via a pin, and the support members (512) are fixedly connected to the top of the anchor member (1).

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