为了查明岩石的破坏过程,用有限元法对岩石的应力-应变和破坏裂缝的产生、扩展之间的关系进行了模拟研究。 1.破坏扩展的模拟方法在模拟中采用顺序破坏法。假设与无裂缝部分相比,潜裂缝部分是一种更易变形的材料,将它视为包含模型。用有限元法求出模型内各单元由于加载而产生的应力。采用法尔赫斯特和冈行俊等人提出的相对破坏极限接近度作为破坏准则,推断出最接近于破坏的单元,当作发生局部破坏的地方。把破 In order to find out the process of rock failure, the finite element method was used to simulate the relationship between the stress-strain of rock and the generation and propagation of failure cracks. 1. Destructive simulation method to simulate the use of sequential destructive method. Assuming that the latent fracture part is a more deformable material than the crack-free part, it is considered to contain the model. Finite element method is used to calculate the stress of each unit in the model due to loading. Using the relative damage ultimate proximities proposed by Farhurst and Okamoto and others as the failure criterion, the unit closest to the damage is deduced as the place where the local damage occurred. Put broken