岩石的蠕变断裂特性分析

Characters of Rheological Fracture of Rock

在传统断裂力学基础上，引进时效特性，提出了判断岩石起裂的流变断裂准则以及裂纹时效扩展机理，分析了裂尖微裂区对断裂韧度的影响，最后用灰色理论建立了蠕变断裂时间预测模型，并验证了它的可行性．

Based on traditional theory of fracture, the take-dependence of rock is discussed and the creep fracture criteria are given. The evolution of crack is discussed. The effect of microcrack zone on fracture toughness is also analyzed.Finally, the model of time prediction of rheological fracture is derived, and its feasibility is proved.