An anti-regression bolt for rock and soil layer in mining

Abstract

The invention discloses a rock-soil layer anti-regression bolt for mining, which relates to the technical field of mining engineering and includes an anchor head, a rod body and a bolt joint. The inner wall of the hollow tube is movably connected with rotating gears, the bottom of the rotating shaft is rotatably connected with the top of the arc tooth block, and the outer wall of the hollow tube is uniformly provided with several hollow pointed ends. The present invention uses a hollow tip and a hollow tube, wherein when cement is injected into the anchor rod, the push block squeezes the hose, and the hollow tube is ejected by the pressure of the cement on the push block, and the outer wall of the hollow tube is provided with a hollow tip. The tip is conical, and the hollow tip is inserted into the rock and soil layer. The cement will flow into the hollow tip along the hollow tube to better bond and fix the anchor rod and the rock and soil layer. When the cement flows into the inside of the front drill bit, it will be squeezed The pressure plate and the hook cover move up along the slideway to push out the drill shell, and the hook tube is barb-shaped to prevent the safety problems of the mining workers or the rock and soil collapse caused by the retreat of the bolt.

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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