Abstract: To obtain the influence of underground mining activity on rock slop stability, by using numerical simulation and orthogonal experiment, the influencing process of main factor changes ( e.g. coal seam thickness, mining depth, goaf size, relative position between coal face and slop, coal seam dip angle) on rock slop stability and the parameter sensitivities during mining process were analyzed in this paper. The results show that the influence degree of mining activity on rock slop stability increases with the increase of goaf size and coal seam thickness, and decreases with the increment of coal seam dip angle and relative position between coal face and slop. Meanwhile, the influence of mining depth on slop stability firstly increases, then decreases, while mining in the depth between 200~250m.most influence the slop stability. When meeting the production demands, the goaf size control is the best method to reduce the influence of mining activity on rock slop stability.

Key words: rock slop, parameter sensitivity, slop stability, change rate of safety coefficient