ANALYSIS ON ROCKBURST MECHANISM IN SANHEJIAN COAL MINE
三河尖煤矿冲击矿压发生机制分析

By analyzing rockburst in Sanhejian Coal Mine, the growth, coalescence and interaction of cracks with free surface are discussed in the compression stress concentration area near opening free surface. Near the free surface, the growth, coalescence and interaction of cracks with free surface make crack propagation and cause the thin rock layer parallel to free surface. This process repeats continuously. Thin rock layers buckle and fracture under outside disturbance, and lead to the occurence of rockburst. Splitting is a dominant manner of destruction.