Abstract:Based on the statistical data, intensive analysis was carried out on the slide of mining waste dump. Three types of landslide were proposed, which includes interior slide, slide along contact surface and slide caused by floor heave. According to the measured data of dump slide, debris flow, and measured precipitation of Yongping Copper Mine, relationship between the effective rainfall intensity in 10-min and 1hour and the effective rainfall, was studied about the south and northwest waste dump. Then the rainstorm critical line was put forward. Combined with measured data scatter diagram and fitted formula, the debris flow of waste dump can be predicted in a reliable probability.