Pressure-relief support coordination control method for deep high-stress tunnel based on borehole pressure relief

Abstract

The invention discloses a pressure-relief support coordination control method for a deep high-stress tunnel based on borehole pressure relief. The method comprises three steps according to a time sequence, and the three steps are respectively a primary pressure relief support step, a borehole pressure relief step and a secondary high-strength anchor grouting support step. According to the pressure-relief support coordination control method for the deep high-stress tunnel based on borehole pressure relief, surrounding rock deformation in each stage is controlled by adopting different support and reinforcement methods according to difference of surrounding rock deformation ways in different stages after the tunnel is excavated, the support performances of surrounding rocks and supporting structures are fully played, and large deformation of the surrounding rocks of a deep high-stress tunnel is reduced, so the stability of the tunnel can be maintained for a long time. Meanwhile, the method disclosed by the invention is capable of effectively reducing the repair rate of the tunnel, alleviating the labor intensity of workers and lowering the comprehensive support cost of a mine.

Description

technical field [0001] The invention relates to the field of roadway surrounding rock control, in particular to a deep roadway surrounding rock stability control method, in particular to a deep high-stress roadway pressure relief support coordination control method based on drilling pressure relief. Background technique [0002] With the continuous development of society, especially the strong dependence on resources, the development of resources is becoming wider and deeper; among many energy sources, the use of coal has made great contributions to the development of society in many fields. Outstanding contribution, and the safety of coal development has always been the top priority of many parties. [0003] After the coal mine enters deep mining, the coal rock mass is under the action of high ground stress, high and low temperature, high osmotic pressure and strong time effect for a long time. long-term stability. Surrounding rock stress, lithology and support are the ma...

AI Technical Summary

Problems solved by technology

However, the application of this method will undoubtedly cause certain disturbances to the strength of the roadway surrounding rock and the primary support structure, which is not conducive to the control of the creep of the roadway surrounding rock in the later stage of excavation. There are certain limitations in roadways with long service life (big alleys, up and down hills, etc.), which affect the popularization and application of this technology

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