Research on mechanical characteristics of damage in surrounding rock mass with high geo-stress

Based on micro-damage mechanics theory, a micro-damage model is established for the stability analysis of the wall rocks in high stress region, and the whole damage process of the wall rock is analyzed. By introducing the concept of equivalent model, the equivalent models of the wall rock in the damaged region both before and after its damage are respectively established. Furthermore, the regularity changing with construction of the main mechanical parameters, including stiffness, deformation module and etc, is studied quantificationally and the changing numerical values are obtained according to the mechanical characteristic curves from the experiments on the equivalent models. As a result, reliable basis is provided for the stable analysis and the structural design of the rock and as well as the criterion for partitioning the disturbed region of the wall rock after excavation.