Soft coal roadway anchor rod supporting device

Abstract

The utility model discloses an anchor rod supporting device for a soft coal roadway. The anchor rod supporting device comprises an anchor rod body, a grouting channel, a grouting opening, a base plate, a nut and a reinforcing structure. By arranging the reinforcing structure, when the anchor rod body is inserted into a hole of a soft coal roadway, the connecting pipe can be inserted into the hole together with the anchor rod body, and after the anchor rod body is inserted, the push head can abut against the tail end of the hole to push the push rod, so that the push rod slides into the connecting pipe; according to the anchor rod body, the inserting rod extends and slides towards the outer portion of the connecting pipe, the extending inserting rod can be inserted into a soil layer to be reinforced, the inserting rod can be filled with the inserting rod when cement mortar is injected, and therefore the firmness of the anchor rod body is improved, and the tensile capacity is improved.

Description

Technical Field

[0001] The utility model relates to the field of tunnels, in particular to an anchor support device for a soft coal tunnel. Background Art

[0002] Soft coal tunnels are various passages drilled between the surface and the ore body, which are used for transporting coal, ventilation, drainage, pedestrians, and various necessary preparatory projects for metallurgical equipment to mine ore. These passages are collectively called tunnels. In order to improve the safety of the tunnels, anchor support devices are installed on the walls of the tunnels. The use of anchor support can improve the mechanical parameters of the broken coal body and improve the deformation performance of the broken coal body, thereby strengthening the strength of the tunnel surrounding rock, controlling the large deformation of the tunnel, and enhancing the stability of the soft coal tunnel.

[0003] Existing patent: CN218953349U, a coal tunnel anchor support, relates to the field of anchor support technology, including an anchor body, a nut installed at one end of the anchor body, a slurry stop plug and a pad between the nut and the slurry stop plug, the anchor body is provided with a placement hole at one end away from the nut, a sleeve is installed inside the placement hole, a spring is sleeved on the outside of the sleeve, a rotating shaft is installed on the surface of the sleeve, and a support rod is movably connected inside the rotating shaft. The utility model inserts the anchor body into a pre-opened hole, during the insertion process, one end of the sleeve first contacts with the bottom of the hole, and the sleeve moves into the placement hole under continued pressing. During the movement, the support rod receives the extruded edge and extends outward to contact the hole wall, and the anchor body is always fixed in the center position of the support rod during the deformation process. The utility model has a simple structure, which avoids the situation that when cement slurry is poured in the use process, the side inclined to the soil layer has less contact with the cement slurry, resulting in unstable installation of the already short anchor rod, thereby avoiding safety hazards.

[0004] The above patents or existing anchor support devices have the following problems:

[0005] The existing anchor support device is fixed by injecting cement mortar after being inserted into the anchor hole. Since the anchor used in the coal tunnel is short, the cement mortar has less contact with the soil layer after being injected, which leads to the problem of poor stability. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a soft coal tunnel anchor support device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a soft coal tunnel anchor support device, including an anchor body, a grouting channel is arranged in the anchor body, a grouting port is arranged at the lower end, a pad is sleeved on the surface of the anchor body, and a nut connected to the anchor body. A reinforcement structure is arranged at the end of the anchor body, and the reinforcement structure includes a connecting pipe, which is arranged at the end of the anchor body, an insert rod is arranged inside the connecting pipe, and a push rod is slidably connected to the lower end of the connecting pipe, a push head is arranged at the lower end of the push rod, a limiting plate is arranged in the middle, and a push plate is arranged at the upper end.

[0008] Preferably, the insertion rod is arranged to be inclined, and the inclination angle is not greater than seventy-five degrees and not less than sixty degrees.

[0009] Preferably, a notch is provided on the outer side of the insertion rod, and the notch is located on the end surfaces at both ends of the insertion rod.

[0010] Preferably, a positioning frame is provided inside the connecting tube, and the insertion rod is located in the positioning frame.

[0011] Beneficial effects of the utility model:

[0012] The utility model is provided with a reinforcement structure. When the anchor rod body is inserted into the hole of the soft coal tunnel, the connecting pipe will be inserted into the hole together. After the anchor rod body is inserted, the push head will be supported by the end of the hole to push the push rod, so that the push rod slides into the connecting pipe. At the same time, the push plate will push the insertion rod, so that the insertion rod extends and slides to the outside of the connecting pipe. The extended insertion rod will be inserted into the soil layer to reinforce it. When cement mortar is injected, the insertion rod will also be filled on the insertion rod, thereby improving the firmness of the anchor rod body and improving the tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the front cross-sectional structure of the reinforcement structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the top view of the reinforcement structure of the utility model.

[0016] Among them: anchor body-1, grouting channel-2, grouting port-3, pad-4, nut-5, reinforcement structure-6, connecting pipe-61, insert rod-62, push rod-63, push head-64, limit plate-65, push plate-66, recess-621, and positioning frame-622. DETAILED DESCRIPTION

[0017] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0018] See also Figure 1 and Figure 2 The utility model provides an anchor support device for a soft coal tunnel, comprising an anchor body 1, a grouting channel 2 is integrally formed in the middle of the anchor body 1, a grouting port 3 communicating with the grouting channel 2 is integrally formed at the lower end of the anchor body 1, a pad 4 is sleeved on the surface of the anchor body 1, a nut 5 is threadedly connected to the anchor body 1, and a reinforcement structure 6 is arranged at the end of the anchor body 1;

[0019] Holes are opened in the soft coal tunnel and the surrounding rock, and then the anchor body 1 is inserted into the hole, and then the pad 4 is put on the end protruding from the surrounding rock and fixed by the nut 5. After fixation, cement mortar is injected into the grouting channel 2, and then the cement mortar is filled in the gap between the anchor body 1 and the hole through the grouting port 3. After solidification, the anchor body 1 is fixed. The use of anchor support can improve the mechanical parameters of the broken coal body and improve the deformation performance of the broken coal body, thereby strengthening the strength of the tunnel surrounding rock, controlling the large deformation of the tunnel, and enhancing the stability of the soft coal tunnel.

[0020] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a soft coal tunnel anchor support device, the reinforcement structure 6 includes a connecting tube 61, the connecting tube 61 is welded to the lower end of the anchor body 1, and the connecting tube 61 is equipped with a plug rod 62 slidably connected thereto, the plug rod 62 is inclined at 75 degrees, and a notch 621 is integrally formed on the surface of the plug rod 62, the notch 621 is symmetrically arranged, and the notch 621 is used to better mix with cement mortar, thereby improving the firmness of the fixation, and the lower end of the connecting tube 61 is equipped with a push rod 63 slidably connected thereto in a vertical state, the lower end of the push rod 63 is integrally formed with a push head 64, and the middle part is integrally formed with a limit plate 65, the limit plate 65 is used to prevent the push rod 63 from sliding out and causing the plug rod 62 to fall into the inside of the connecting tube 61, and a push plate 66 is arranged at the upper end;

[0021] A positioning frame 622 is provided inside the connecting tube 61, and the insertion rod 62 is located in the positioning frame 622, which is used to position the insertion rod 62;

[0022] When the anchor body 1 is inserted into the hole of the soft coal tunnel, the connecting pipe 61 will be inserted into the hole together, and after the anchor body 1 is inserted, the push head 64 will be supported by the end of the hole and push the push rod 63, so that the push rod 63 slides into the connecting pipe 61. At the same time, the push plate 66 will push the insertion rod 62, so that the insertion rod 62 extends and slides to the outside of the connecting pipe 61. The extended insertion rod 62 will be inserted into the soil layer to reinforce it. When the cement mortar is injected, the insertion rod 62 will also be filled on the insertion rod 62, thereby improving the firmness of the anchor body 1 and improving the tensile strength.

[0023] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soft coal tunnel anchor support device, comprising an anchor body (1), a grouting channel (2) is arranged in the anchor body (1), a grouting port (3) is arranged at the lower end, a pad (4) sleeved on the surface of the anchor body (1), and a nut (5) connected to the anchor body (1); Features: The anchor rod (1) further comprises a reinforcement structure (6), wherein the reinforcement structure (6) is arranged at the end of the anchor rod body (1), and the reinforcement structure (6) comprises a connecting tube (61), wherein the connecting tube (61) is arranged at the end of the anchor rod body (1), an insert rod (62) is arranged inside the connecting tube (61), and a push rod (63) is slidably connected to the lower end of the connecting tube (61), a push head (64) is arranged at the lower end of the push rod (63), a limiting plate (65) is arranged in the middle, and a push plate (66) is arranged at the upper end.

2. The soft coal tunnel bolt support device according to claim 1, characterized in that: The insertion rod (62) is arranged in an inclined manner, and the inclination angle is not greater than seventy-five degrees and not less than sixty degrees.

3. The soft coal tunnel bolt support device according to claim 2, characterized in that: The outer side of the insertion rod (62) is provided with a notch (621), and the notch (621) is located on the end surfaces at both ends of the insertion rod (62).

4. The soft coal tunnel bolt support device according to claim 1, characterized in that: A locking frame (622) is provided inside the connecting tube (61), and the inserting rod (62) is located in the locking frame (622).

Images