岩石变形破坏全过程的概率损伤方法研究

Research on method for probability damage on the full process of rock deformation and failure

从岩石内部裂隙、空洞和界面等缺陷的随机性分布特征出发,基于反映岩石内部缺陷的微元强度服从随机分布的概念,并基于Drucker Prager岩石破坏准则,提出了岩石微元强度的表示方法.利用岩石微元强度服从Weibull与正态分布的特性,分别建立了反映岩石变形破坏全过程的损伤概率本构模型,试验结果表明所提出的两种模型均具有明显的合理性与优越性.图1,参10.

Based on the characteristics of random distribution of fissure,void and interface,and the concept of random distribution of strength of rock micro-unit,this authois brought forward computation formulae for rock micro-unit strength using Drucker-Prager criterion.The probability damage constitutive models have separately been established founded on Weibull and normal distribution,and it compared with test results and former methods and indicates that there are obvious rationality and superiority on the two models.1fig.,10refs.