Asymmetrical supporting method of impact ground pressure roadway

Abstract

The invention discloses an asymmetrical supporting method of an impact ground pressure roadway. The asymmetrical supporting method comprises the steps: according to the vertical stress and tectonic stress in surrounding rock of the roadway, and the coal seam dip angle, the direction of main acting force, in the normal direction of a coal seam, in the surrounding rock of the roadway is determined;the top, the hance and side wall parts of the roadway located in the coal seam are supported through anchor cables and inner-layer reinforcing meshes, wherein the anchor cables are densified, lengthened and/or patched at the positions, directly facing the direction of the main acting force, of the roadway, and then the roadway is asymmetrically supported; and the working resistance of the anchor cables at the top, the hance, the side wall parts and/or a bottom plate of the roadway is monitored in real time, the measure of reinforcing supporting or pressure relieving is taken, the supporting quality of the surrounding rock of the roadway is guaranteed, and then the roadway is asymmetrically supported. According to the asymmetrical supporting method, supporting is reinforced only in the direction of the main acting force in the normal direction of the coal seam, and thus the supporting efficiency and effect are improved.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to an asymmetric support method for rock burst roadways. Background technique [0002] With the gradual increase of the depth of coal mining in my country, the number of deep mines has increased year by year, and the frequency and intensity of rock bursts have also increased year by year. The study found that the occurrence of rock burst went through three stages in sequence: "shock initiation→shock energy transfer→rock burst appearance", in which strong support can reduce the degree of catastrophe in the stage of rock burst appearance. From the case of rock burst, it can be seen that the appearance of rock burst is often directional, and this direction is the direction of the main force. However, the current support of rock burst roadway still has insufficient consideration of the magnitude and direction of the main force, which makes the pertinence of rock burst roadway ...

AI Technical Summary

Problems solved by technology

However, the current support of rock burst roadway still has insufficient consideration of the magnitude and direction of the main force, which makes the pertinence of rock burst roadway support not strong, and reduces the support efficiency and effect

[0003] To sum up, there is currently no roadway support method for rock burst that can consider the magnitude and direction of the main force, integrate strong support and strong yielding performance, and is convenient for construction, strong in applicability, and low in cost.

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