Abstract:
Aiming at the problem of deep mining and frequent mine earthquakes of Laohutai Coal Mine, the roadway support scheme under dynamic and static coupling was optimized. The numerical simulation of dynamic and static load coupling was carried out, and the numerical simulation was carried out on the roadway under the support conditions of “unsupported”, “bolt + anchor mesh support”, “bolt + anchor net + U shed support” and “bolt + anchor net + O shed support”. The failure depth of surrounding rock of “bolt + anchor net + O shed support” scheme was 1 m to 1.7 m, and the stress of surrounding rock was lower, the overall effect on the surrounding rock control was better. The support effect under different dynamic load conditions was simulated. When the dynamic load was greater than 70 MPa, the failure range of the surrounding rock exceeds the anchorage area, the stress condition of the surrounding rock becomes worse and the roadway tends to be unstable. The ultimate load bearing capacity of the dynamic load was 70 MPa.