【摘 要】
：
Deep rock mass possesses some unusual properties due to high earth stress, which further result in new problems that have not been well understood and explained
【机 构】
：
Engineering Institute of Engineering Corps,Institute of Structural Mechanics
【基金项目】
：
The National Science Fund for Distinguished Young Scholars;The National Key Basic Research Program of China;The Science Fund for Creative Research Group of the National Natural Science Foundation of C
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Deep rock mass possesses some unusual properties due to high earth stress, which further result in new problems that have not been well understood and explained up to date. In order to investigate the deformation mechanism, the complete deformation process of deep rock mass, with a great emphasis on local shear deformation stage, was analyzed in detail. The quasi continuous shear deformation of the deep rock mass is described by a combination of smooth functions: the averaged distribution of the original deformation field, and the local discontinuities along the slip lines. Hence, an elasto-plastic model is established for the shear deformation process, in which the rotational displacement is taken into account as well as the translational component. Numerical analysis method was developed for case study. Deformation process of a tunnel under high earth stress was investigated for verification.
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