Abstract:In view of the poor stability of roadway surrounding rock after deep mining in Datun Tin Mine, in order to ensure safe and efficient mining, in this paper, the effects of stope buried depth, hexagonal room span-height ratio and lateral pressure coefficient on surrounding rock stability are analyzed by numerical simulation. The research shows that : (1)Each influencing factor has an effect on the displacement and stress of the surrounding rock, and there is a significant interaction between the influencing factors ; (2)The influence of buried depth and lateral pressure coefficient on the displacement of surrounding rock is more significant than that of span-height ratio. (3)When the width of hexagonal room is greater than the height, the stress of two sides increases linearly, and the influence of span-depth ratio on surrounding rock stress is greater than the buried depth and lateral pressure coefficient. Accordingly, when the depth of the stope and the lateral pressure coefficient are determined, changing the size of the hexagonal chamber can improve the stability of the surrounding rock,The research results have certain reference value for mining design.