ABSTRACT
ABSTRACT: Discontinuous Deformation Analysis (DDA) method is used to analyze the rock stability, deformation and splitting failure of underground powerhouse with different lateral initial stress levels. Splitting test, coefficient of lateral initial stress, reinforcement effect and joint structure pattern affecting on rock stability are studied. The criterion for splitting failure in surrounding rockmass is implemented to predict the depth of splitting area in the side walls. It is shown that reinforcement with rockbolts will bring obvious effects on rock surroundings in controlling deformation, stress distribution and stability.
