Novel underground mine supporting anchor rod

Abstract

The utility model discloses a novel underground mine supporting anchor rod. According to the novel underground mine supporting anchor rod, a cylindrical self-locking expansion mechanism is additionally arranged in an inner cavity of a traditional pipe seam type anchor rod, so that the anchoring force of the anchor rod and the strength of the anchor rod are improved. When the anchor rod is driven into a rock mass by an impact hammer, the deformation of the bottom of the pipe body pushes the self-locking cylindrical structure to expand, so that the pipe body of the anchor rod expands outwards, and the anchoring force is increased. And meanwhile, as the wedges are engaged and self-locked through the sawtooth structures, continuous anchoring force can be provided.

Description

Technical Field

[0001] The utility model relates to the field of underground mine support, in particular to a support anchor rod. Background Art

[0002] In underground mining operations, the stability of the surrounding rock is a key factor in ensuring the safety of workers and smooth production. As the mining depth increases, the ground pressure increases, and the stability of the surrounding rock becomes particularly prominent. For this reason, bolt support technology came into being and gradually became an indispensable part of the mine support system. Anchors connect underground rock formations into a whole, effectively preventing the loosening, sliding, and even collapse of the rock, thereby greatly improving the safety of the working face.

[0003] The uniqueness of the pipe seam anchor lies in its tubular structure and the longitudinal slits opened along the pipe body. When the anchor rod is hammered into a hole slightly smaller than the pipe diameter, radial pressure is generated by the elastic deformation of the open gap, and it actively forms a tight fit with the rock on the hole wall. This process not only increases the friction resistance between the anchor rod and the rock, but also enables the anchor rod to adapt to the irregular shape of the hole wall, so as to achieve a good anchoring effect even under uneven geological conditions. However, the existing pipe seam anchor rods still have the following defects: due to the lack of internal support, the strength of the anchor rod itself is low, the anchoring force it can provide is limited, and the pipe body is easily deformed and damaged, and cannot be reused. Utility Model Content

[0004] The utility model provides a novel underground mine support anchor rod, the purpose of which is to enhance the strength of the anchor rod structure itself to obtain a stronger and continuous anchoring force; and to keep the pipe body from being easily deformed to achieve the purpose of repeated use.

[0005] The technical solution of this utility model is as follows:

[0006] A new underground mine support anchor, including an anchor body, the anchor body including a tube body, a longitudinal slit is provided on the surface of the tube body, and a frustum structure with a pointed tip facing outward is provided at the head of the tube body; the new underground mine support anchor also includes a self-locking expansion mechanism arranged in the inner cavity of the tube body; the self-locking expansion mechanism includes more than two wedge-shaped bodies that cooperate with each other.

[0007] Furthermore, the wedge-shaped body includes an upper inclined wedge, a middle inclined wedge and a lower inclined wedge arranged in sequence; the ends of the upper inclined wedge and the lower inclined wedge close to the middle inclined wedge are both inclined surfaces, and both ends of the middle inclined wedge are inclined surfaces and are in contact with the inclined surfaces of the upper inclined wedge and the lower inclined wedge respectively.

[0008] Furthermore, the inclined surfaces are all provided with sawtooth structures.

[0009] Furthermore, after the upper inclined wedge, the middle inclined wedge and the lower inclined wedge cooperate with each other to form a complete column, the total length of the column is shorter than the length of the cylindrical part of the tube body.

[0010] Compared with the prior art, the utility model has the following positive effects:

[0011] (1) The utility model can convert the impact force into anchoring force through the self-locking expansion mechanism. The anchoring force is more than three times that of traditional anchor rods. For the top plate of an underground mine with the same area, only one-third of the number of traditional anchor rods is needed, which greatly saves the number of anchor rods and reduces the duration of support construction.

[0012] (2) With the support of the self-locking expansion mechanism, the tube body is not easily deformed, and the self-locking expansion mechanism located inside the tube body is not easily damaged, so the tube body can be reused.

[0013] (3) The sawtooth structure between the inclined surfaces achieves self-locking and can provide continuous anchoring force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of the utility model;

[0015] Figure 2 It is a schematic diagram of the appearance structure of the utility model.

[0016] In the figure, 1, anchor rod body; 1-1, tube body; 1-2, cone structure; 1-3, retaining ring; 2, self-locking expansion mechanism; 2-1, upper inclined wedge; 2-2, middle inclined wedge; 2-3, lower inclined wedge; 2-4, serrated structure. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0018] like Figure 1 , Figure 2 As shown, a new type of underground mine support anchor includes an anchor body 1 and a retaining ring 1-3 fixed to the tail of the tube body 1-1; the anchor body 1 includes the tube body 1-1, the surface of the tube body 1-1 is provided with a longitudinal slit, and the head of the tube body 1-1 is provided with a cone structure 1-2 with a pointed tip facing outward.

[0019] The novel underground mine support anchor also includes a self-locking expansion mechanism 2 placed in the inner cavity of the tube body 1-1; the self-locking expansion mechanism 2 includes at least two wedge-shaped bodies that cooperate with each other; the wedge-shaped body includes an upper inclined wedge 2-1, a middle inclined wedge 2-2 and a lower inclined wedge 2-3 arranged in sequence.

[0020] The upper inclined wedge 2-1 and the lower inclined wedge 2-3 are both inclined at one end close to the middle inclined wedge 2-2, and both ends of the middle inclined wedge 2-2 are inclined, and they are in contact with the inclined surfaces of the upper inclined wedge 2-1 and the lower inclined wedge 2-3 respectively. The inclined surfaces are all provided with sawtooth structures 2-4, and the upper inclined wedge 2-1, the middle inclined wedge 2-2 and the lower inclined wedge 2-3 cooperate with each other to form a complete column, and its total length is shorter than the length of the cylindrical part of the tube body 1-1.

[0021] When in use, the assembled new anchor rod is placed on the turntable of the anchor rod trolley. After the anchor rod trolley drills a hole, the anchor rod is hammered into the rock mass by an impact hammer. The tube body 1-1 is slightly deformed under the action of the impact hammer. After the bottom of the tube body 1-1 is deformed, an axial force is applied to the self-locking expansion mechanism 2. The frustum structure 1-2 applies resistance to the self-locking expansion mechanism 2. The self-locking expansion mechanism 2 is squeezed, causing the inclined planes to further stagger. The radial size of the self-locking expansion mechanism 2 increases, driving the tube body 1-1 to expand, squeezing the surrounding rock mass, thereby increasing the anchoring force. At the same time, the sawtooth structure 2-4 is used to achieve self-locking between the inclined planes, and will not loosen, thereby providing continuous anchoring force.

[0022] After use, the entire support anchor can be taken out. Because the self-locking expansion mechanism 2 is provided inside, the tube body 1-1 is not easily deformed and can generally be reused more than 2 times, and the self-locking expansion mechanism 2 can be reused more than 5 times.

[0023] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A novel underground mine support anchor, comprising an anchor body (1), the anchor body (1) comprising a tube (1-1), the surface of the tube (1-1) being provided with a longitudinal slit, the head of the tube (1-1) being provided with a frustum structure (1-2) with a pointed tip facing outward, characterized in that: The novel underground mine support anchor also includes a self-locking expansion mechanism (2) disposed in the inner cavity of the tube body (1-1); the self-locking expansion mechanism (2) includes two or more wedge-shaped bodies that cooperate with each other.

2. The novel underground mine support anchor according to claim 1 is characterized in that: The wedge-shaped body comprises an upper inclined wedge (2-1), a middle inclined wedge (2-2) and a lower inclined wedge (2-3) arranged in sequence; the ends of the upper inclined wedge (2-1) and the lower inclined wedge (2-3) close to the middle inclined wedge (2-2) are both inclined surfaces, and both ends of the middle inclined wedge (2-2) are both inclined surfaces and are in contact with the inclined surfaces of the upper inclined wedge (2-1) and the lower inclined wedge (2-3) respectively.

3. The novel underground mine support anchor according to claim 2 is characterized in that: The inclined surfaces are each provided with a sawtooth structure (2-4).

4. The novel underground mine support bolt according to claim 2 or 3, characterized in that: After the upper inclined wedge (2-1), the middle inclined wedge (2-2) and the lower inclined wedge (2-3) cooperate with each other to form a complete column, the total length of the column is shorter than the length of the cylindrical part of the tube body (1-1).

Images