Prevention and control method for deep pressure relief and shallow reinforcing of advanced coal body of rock burst mine

Abstract

The invention discloses a prevention and control method for deep pressure relief and shallow reinforcing of an advanced coal body of a rock burst mine. The prevention and control method comprises thefollowing steps of constructing a pressure relief chamber at an interval of L2 within a range L1 + L2 away from a cutting hole before stoping of a working surface, advancing L2 for the working surfaceafter stoping, continuously constructing a next pressure relief chamber at the interval of L2, through mutual cooperation of the front pressure relief chamber and the rear pressure relief chamber ina structural unit, enabling a pressure relief project to be transferred to a deep part, so that roadway shallow surrounding rock damage caused by the pressure relief project is reduced; and through mutual cooperation of supporting bodies and inner and outer grouting holes in a reinforcing project, enabling an integral grouting reinforcement area to be formed between a front pressure relief hole and a rear pressure relief hole. According to the prevention and control method, the contradiction between rock burst prevention and control of a small coal pillar gob-side roadway and roadway supporting can be effectively solved, high stress borne by a shallow coal body of the working face gob-side roadway is transferred to the deep part, and shallow grouting reinforcement, pressure relief and reinforcement engineering are moved into the pressure relief chambers, so that the influence on the normal work of the working face is further reduced.

Description

technical field [0001] The invention belongs to the technical field of coal mines, and in particular relates to a prevention and control method for pressure relief and shallow reinforcement at the deep part of the advance coal mass of a rockburst mine. Background technique [0002] With the depletion of coal resources in the central and western parts of my country, coal mines are gradually developing towards the west and deep, and the subsequent rock burst problem has become one of the main disasters that hinder the safe and efficient production of coal mines. The prevention and control of rock burst in general mines includes: identification of impact tendency, adoption of preventive measures, prediction of impact risk, implementation of risk relief measures, and effect inspection. At present, local rockburst prevention measures mainly include the following: drilling pressure relief, coal seam blasting, coal seam water injection, roof pressure relief, roof pre-cracking, hydr...

AI Technical Summary

Problems solved by technology

However, simply using the existing preventive measures will often cause problems such as large deformation of the roadway and failure of the roadway support. While investing heavily in the pressure relief project, the original support is also destroyed, resulting in a further increase in support costs, resulting in High production costs, many personnel and equipment, and low production efficiency severely restrict the normal development of coal mines

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