A mine multi-steel strand combined support device and method

Abstract

The invention relates to a multi-steel strand combined support device for mining. The front end of the steel strand is provided with a guide cap, the center of the steel strand is provided with a grouting pipe, and the front end of the grouting pipe is provided with the top end of the guide cap. There is grouting round steel, grouting holes are distributed on the wall of the grouting pipe, hoops are arranged around the steel strands from top to bottom, and steel strands are fitted around the steel strands at the free section of the support device. Wire casing, the peripheral anastomosis of the steel strands located in the sealing section of the support device is equipped with lug-type sealing rubber sleeves and round table sealing rubber sleeves. The tail ends of the steel strands are fastened to the supporting plate through porous locks. The steel strands A clip is provided between the porous lockset. The support device can not only improve the tensile and shear strength of the support components to a large extent, but also better mobilize the bearing capacity of the deep stable surrounding rock. The support device has a simple structure and is easy to install. The reinforcement work has brought great convenience.

Description

technical field [0001] The invention relates to a support device, in particular to a mining multi-steel strand combined support device for controlling deformation of roadway surrounding rock through steel strand combined support. Background technique [0002] At present, domestic mines mainly use a single steel strand anchor cable or hollow grouting anchor cable to reinforce the deep surrounding rock of the roadway. The single anchor cable used in ordinary mines is mostly anchored by resin at the end to give the surrounding rock a high pre-tightening force and mobilize the bearing capacity of the deep surrounding rock. Hollow grouting anchor cables are generally first anchored with resin at the end, and then reinforced by grouting after tensioning to achieve full-length anchoring, which has both high prestress and full-length anchoring characteristics. [0003] However, with the deepening of the mining level, under the conditions of plateau rock stress and strong mining dis...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing mine single steel strand anchor cable or hollow grouting anchor cable cannot reinforce the large loose circle rock formation, the present invention provides a A multi-steel strand combination support device for mines, which can not only greatly improve the tensile and shear strength of the support components, but also better mobilize the bearing capacity of the deep stable surrounding rock, and is effective in supporting the surrounding rock While performing grouting reinforcement, it can adapt to the impact tendency of deep mining and the continuous deformation characteristics of deep surrounding rock, and the support device has a simple structure, easy installation, and strong impact load capacity; Pulling makes the steel strand evenly stressed, which is conducive to the stability of the support structure and brings great convenience to the reinforcement of the rock formation in the mine's large loose circle

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