Rock-soil layer anti-backward anchor rod for mining

Abstract

The invention discloses a rock-soil layer anti-backward anchor rod for mining, and relates to the technical field of mining engineering. The rock-soil layer anti-backward anchor rod comprises an anchor head, a rod body and an anchor rod joint, wherein drilling plates are uniformly arranged on the outer wall of a hollow tube; the inner wall of the hollow tube is movably connected with a rotary tooth part; the bottom of a rotary shaft is rotatably connected with the top of an arc-shaped tooth block; and a plurality of hollow sharp heads are uniformly arranged on the outer wall of the hollow tube. According to the rock-soil layer anti-backward anchor rod disclosed by the invention, the hollow sharp heads and the hollow tube are arranged, so that when cement is injected into the anchor rod, a pushing block extrudes a hose, and the hollow tube is ejected out by pressure, on the pushing block, of cement; the hollow sharp heads are arranged on the outer wall of the hollow tube, are tapered, and are inserted into a rock-soil layer, and cement flows into the hollow sharp heads along the hollow tube, so that the anchor rod and the rock-soil layer are bonded and fixed better; when cement flows into a front drill bit, a pressure plate is extruded, and a hook cover moves upwards along a slide path to eject out a drill shell; and a hook tube is in the shape of an inverted hook, so that the anchor rod is prevented from moving backwards to cause safety problems of mining workers or rock-soil collapse.

Description

technical field [0001] The invention relates to a bolt, which relates to the technical field of mining engineering, in particular to a rock-soil layer anti-regression bolt for mining. Background technique [0002] The bolt is the most basic part of roadway support in contemporary coal mines. It reinforces the surrounding rock of the roadway so that the surrounding rock can support itself. Anchor rods are not only used in mines, but also in engineering technology to carry out main body reinforcement for slopes, tunnels, and dam bodies. Anchor rods are rod system structures for rock and soil reinforcement. The tensile capacity of soil is far lower than the disadvantage of compressive capacity. On the surface, it restricts the separation of the rock and soil from the original body, and on the macroscopic view, it increases the cohesion of the rock and soil. There are following problems at prior art: [0003] 1. In the prior art, the bolts used in the mining process still hav...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a rock-soil anti-regression bolt for mining, one of the purposes of which is to have the anchor head and the rock layer firmly bonded together, so as to solve the problem that the anchor head is easy to loosen in the rock layer. Another purpose is to solve the problem that the entire anchor, including the cement bonding layer around the anchor, falls off together and falls back into the rock layer, so as to prevent the anchor from falling off through the hook tube and the hollow tip. retrograde effect

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