厚硬顶板弱化前后垮落致灾数值模拟研究
吕闹,汪海波
Numerical Simulation of Collapse Disaster Before and After Weakening of Thick and Hard Roof
Nao LV,Haibo WANG
图2
顶板弱化前后计算模型
Fig.2
Calculation model of roof before and after weakening