Mine bracket

Abstract

The invention provides a mine bracket. The mine bracket comprises a connection type locking device, a clamping cable, a bracket tilting preventing device and a timber foot shoe. The mine bracket greatly accelerates the engineering construction progress, and solves the phenomena that a U-shaped timber bracket clamping cable is damaged and losses stability, the stress load of the bracket is uneven, S-shaped distortion occurs, the timber foot is lowered, collapse occurs, and the like. The mine bracket ensures that a surrounding rock body and the bracket are early coupled into a whole body, the stress of the surrounding rock body is converted into stable stress state, meanwhile the supporting strength of the bracket is enhanced, the supporting mode reduces the supporting workload, construction is simple and convenient, the labor intensity of workers is reduced, and the production safety is improved.

Description

technical field [0001] The invention relates to a mine tunnel support. Background technique [0002] The support effect of the existing mine tunnel support is not good during the construction process, and there will be problems such as support instability, cannon-shot shed, roof fall and push the shed, shed legs tied down, and large water spraying, etc., which seriously affect the construction progress of the project. [0003] The above-mentioned problems are described in detail below: [0004] Bracket instability failure: Under the combined action of the top pressure of the roadway and the side of the roadway, the shed legs with a buried depth of only 0.2m are pressed into the bottom plate by 0.5-1.0m, forming a shed leg down-tie, and the angle of the two shed legs is the same as The difference in depth leads to the instability of the support, and the support force of the support to the surrounding rock drops sharply, so that the support loses its supporting function. [...

AI Technical Summary

Problems solved by technology

[0007] Shock waves and thrown rocks from blasting excavation will knock down the shed: due to the rapid change of the coal seam and the roof, the coal seam becomes thinner and no roof is mainly yellow mud, which cannot be excavated quickly by fully mechanized excavators. Several sheds adjacent to the working face that were not well connected by the tie rods and had no anti-fall devices jumped down due to the rocks, resulting in failure of support, and at the same time there were phenomena such as roof falling and pushing the sheds, which greatly increased the labor intensity of the whole shed after the workers fired the guns. Reduced labor efficiency brings safety hazards

Images