Rock burst roadway three-level prevention and control method

Abstract

The invention provides a rock burst roadway three-level prevention and control method. The method comprises the steps that before roadway excavation, pre-weakening treatment is conducted on a thick and hard rock stratum above a roadway; when the roadway is tunneled, prestress supporting, pressure relief and reinforcement are carried out; before working face stoping, stress transfer is conducted onadvance bearing pressure, and a composite energy absorption protection structure is arranged on the periphery of the roadway; roadway impact energy and stress borne by the roadway can be reduced fromthe driven and static load angles by releasing pressure of far and near fields of roadway surrounding rock; active support is combined with a surrounding rock structure remodeling technology, so thatthe self-bearing capacity and the impact resistance of roadway surrounding rock are improved; and by means of the composite energy absorption protection structure, the energy dissipation capacity ina roadway space is improved, and finally balance between impact energy and roadway dissipation energy is achieved. By coordinating the space-time relationship among pressure relief, support and protection, the energy dissipation process of the rock burst roadway is converted into a stable, ordered and controllable dissipation state from an unstable, disordered and uncontrollable dissipation state.

Description

technical field [0001] The invention relates to the technical field of roadway construction methods, in particular to a three-stage prevention and control method for rock burst roadways. Background technique [0002] Rockburst (rock burst) refers to a dynamic phenomenon of sudden and violent destruction of coal and rock mass due to the instantaneous release of elastic energy in the coal mining space. The process of coal rock mass destruction is accompanied by vibration, loud noise and air waves, etc. It is very destructive and is one of the major disasters that affect the safety of deep mines. [0003] The use of stress control and anti-scour support are two key technical means to control the surrounding rock of rock burst roadway. Scholars at home and abroad have carried out a lot of work in the above aspects, but there is a lack of three kinds of prevention and control of pressure relief, support and protection. Research on the interaction mechanism of means and collabora...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a three-stage prevention and control method for rock burst roadway, which is used to solve the problem caused by the lack of research on the interaction mechanism and collaborative prevention and control technology of the three prevention and control methods of pressure relief, support and protection in the prior art. Defects with poor control effect

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