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针对深部硬质围岩均质度及临界破裂研究的不足,提出了围岩均质度的确定方法,在此基础上得出了基于均质度的岩体完整程度划分标准;基于围岩均质度建立了硬质围岩发生劈裂破坏和剪切破坏的损伤变量表达式,分析了不同均质度情况下的围岩损伤演化过程,确定了围岩临界破裂及临界破裂波速,以期能更好地指导实际工程,为岩爆发生条件和工程预测预报提供依据。
Aiming at the deficiency of the study on the homogeneity and critical rupture of deep hard surrounding rock, a method to determine the homogenization degree of surrounding rock is put forward. Based on this, the criteria for dividing completeness of rock mass based on homogeneity is obtained. The damage variable expression of fractured and shear failure of hard surrounding rock is established with the mass degree. The evolution of surrounding rock damage under different conditions of homogeneous degree is analyzed, and the critical rupture and critical rupture velocity of surrounding rock are determined. Better guide the actual project, provide the basis for rockburst occurrence conditions and project forecasting.