ABSTRACT
ABSTRACT: A study on distribution of characters of initial stress in the condition of gravity effect in the slopes within the alp of which the slope angles poses 30°, 45°, and 60°, respectively, was conducted by numerical analysis. After comparison, it is found that when closing to the region of slope surface, the difference of vertical stress between the values, which are calculated by the direct buried depth and the actual value, is huge. And the difference becomes huger with the slope becoming steeper. Then, a comparison has been made with excavating a cavern which poses 3 different positions separately at different distances from the slope toe in the condition of 45° slope angle and using the equivalent mechanical parameters of jointed rock mass to make numerical analysis to look the rock stability difference of the three schemes. It is found that the closer to slope surface (slope toe), the larger the plastic zone or the damage zone around the caverns become. Stress distribution is also studied and computed in the double slopes for both sides of the valley, and the results with field measured data are compared. It shows it is extremely consistent with each other.
