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根据非均质岩石参数赋值方法具有随机性的特点,以随机参数的变异系数定义岩石非均质度,推导了Weibull分布参数赋值方法的非均质度计算方法,并与形状参数进行了对比分析;推导了基于矿物细胞元参数赋值方法的岩石非均质度的计算方法;利用上述2种赋值方法研究了岩石非均质度对其力学性能的影响。研究结果表明,利用变异系数定义岩石非均质度是合理的,可用于描述不同非均质岩石模型的非均质程度;非均质岩石的力学特性由细观单元力学特性和其非均质特性共同决定,岩石的非均质性对其极限强度具有弱化影响;对于不同的非均质岩石模型,可建立相同的线性函数关系表示非均质岩石极限强度受其非均质度的影响。
According to the characteristics of heterogeneity of rock parameter assignment, the heterogeneity of rock is defined by the coefficient of variation of random parameter, and the calculation method of heterogeneity of Weibull distribution parameter assignment method is deduced. The comparison with the shape parameter The calculation method of rock heterogeneity based on the meta-parameter assignment method of mineral cells was deduced. The influence of rock heterogeneity on the mechanical properties was studied by the above two kinds of assignment methods. The results show that it is reasonable to use the coefficient of variation to define the heterogeneity of rock, which can be used to describe the heterogeneity of different heterogeneous rock models. The mechanical properties of heterogeneous rock are controlled by the mechanical properties of meso-units and their heterogeneity The heterogeneity of the rock has a weakening effect on the ultimate strength. For different heterogeneous rock models, the same linear function can be established to indicate that the ultimate strength of the heterogeneous rock is affected by its heterogeneity.