Abstract:
Taking the engineering background of working face mining in the influence area of fold structure wing, the mechanism and prevention of rock burst induced by the change of coal seam inclination are studied by field investigation, theoretical analysis, numerical simulation and field industrial test. The results show that: under the superposition of concentrated static load and near-field stress disturbance, coal is easy to be in static failure type or dynamic failure type I, while under the superposition of concentrated static load and far-field stress disturbance, coal is easy to be in dynamic failure type II. As the inclination angle of coal seam increases from 0° to 45°, the vertical stress of coal pillar side of goaf roadway increases gradually, while the vertical stress of solid coal side decreases gradually. A new anti-scour method is proposed, which adopts the cooperative control of surrounding rock pressure relief and asymmetric support. The results of electromagnetic radiation monitoring show that the cooperative control method can effectively improve the stability of surrounding rock.