Abstract：By introducing a concept of additional hydraulic pressure-induced flexibility tensor and considering effects of damage behavior on permeability tensor of fractured rock mass，the coupled behavior of stress and seepage is analyzed. Based on above analysis，a model for coupling analysis on fluid flow and damage is developed. The results obtained from theoretical and practical analysis show that the influence of hydraulic pressure on damage behavior and effects of damage on distribution of hydraulic pressure can not be ignored when there is fluid flow in fractured rock mass.
