Hazardous Area Designating of Pressure Bump and Effect Test of Pressure Relief Based on Mechanical nalysis of Strata Movement of Overlying Multilayer Spa- tial Structures

摘要

With the deepening of mining, dynamic disasters, for example, pressure bump, appear in a large number in the coal mine, and the stress distribution and stress concentration caused by mining act as the important factors that induce the pressure bump. The rationale of studying the stress condition and dynamic condition that induce the pressure bump lies in analyzing the movement and abutment pressure distribution of overlying multilayer spatial structure. We can classify the hazardous area of the pressure bump through the studying the abutment pressure distribution in both inside and outside of the overlying strata spatial structure. And with the combination of microseismic monitoring technology, we can test the effect of stress-relief and dangerrelief of roof breaks and floor breaks by analyzing the movement laws of group rock beams and the shift distance lateral abutment pressure peak toward the coal wall.