Stratum forward Support Influence Area Numerical Simulation Research under Mining Influence
GUO Bao-jing1, JIANG Wan-gang2, SUN-rui2
1.Technique Centre, Shanxi’s Yangquan Coal Industry Group Corporation Ltd., Yangquan 045000, China; 2. China Coal Technology Engineering Group Chongqing Research Institute, Chongqing 454003, China
The displacement and the stress redistribution in front of the working face would occur in the overburden strata of the gob under mining disturbance, based on this problem, the simulation softwareFLAC3D was used to simulate the range of the support affected region in front of the coal wall after mining face. The simulation results showed that after advancing more than 60 m from the working face, the range of the support affected region basically stable, the area of influence reached 85 m in front of the working face. The support pressure peak stress in the coal front reach was about 10 m. By the effect of gas drainage study in front of the working face after mining, the real range of the support affected region coincided with the numerical results.
