Based on progressive failure analysis a 3d finite element model with a hole is built.
基于渐进失效分析方法，建立了带孔的三维有限元模型。
At last, some cases are analyzed to check the theoretical schemes and calculating programs. The results of 3d fracture network seepage are applied to the block system for progressive failure analysis.
最后，采用算例对理论分析过程和计算程序进行检验，并将三维结构面网络渗流分析结果应用到块体系统渐进失稳分析中。
Theoretical analysis shows that the progressive failure of the surrounding rock of opening is mainly caused by strength attenuation and creep mass.
理论分析说明，巷道围岩的渐进破坏主要是岩体强度衰减和蠕变性质影响的结果。
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