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基于弹性力学和断裂力学的理论对裂纹的起裂准则、扩展长度进行了理论分析。使用扩展有限元方法建立裂纹岩体模型,针对单裂纹在渗流应力状态下的扩展规律进行了数值模拟,对渗流-应力耦合下的裂纹扩展规律进行了研究。
Based on the theory of elasticity and fracture mechanics, the crack initiation criterion and the extended length are theoretically analyzed. The cracked rock mass model is established by using the extended finite element method. The numerical simulation of the propagation of single crack under the seepage stress is carried out and the crack propagation law under the seepage-stress coupling is studied.