关键词: 节理岩体, 有限单元法, 位移反分析, 等效模型, 非均质岩体

Abstract: Based on the assumption that the rock mass is of elastic medium and the mechanic model of continuous medium equivalent to jointed rock mass, the equivalent and statistically equivalent models of jointed rock mass are used to discuss the elastic modulus and the stress field in parent rock, both are computed inversely through the back FEM analysis of displacement. By back parametric analysis, the influences of the joint of rock mass and heterogeneity on the results of back analysis of displacement are further discussed. A conclusion is thus drawn that if the mechanic model of continuous medium equivalent to jointed rock mass is based on assumption, using different mechanic models has comparatively obvious influence on the elastic modulus computed inversely. While the heterogeneity of mechanic parameters of jointed rock mass has slight influence on the inversely computed stress field in parent rock. It implies that the assumption of homogeneity or isotropy is applicable to measuring the stress field in parent rock and back analysis of displacement.