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The geological environment is essentially heterogeneous, consists of blocks, layers, lenses, joints of various shapes and sizes, lying horizontally, obliquely or in the form of complex folds in the earth's crust, and it is characterized by great complexity and heterogeneity. The shear in the direction of the joint is one of the main reasons for the destruction of the underground tunnels and mine workings, wellbores. Understanding of shear behavior allows optimal design of mining facilities and prediction of the ge...