ABSTRACT
The first large scale dominant loess dumping area in China, South external dumping area of Antaibao open pit coal mine occurred failure on October 29, 1991. Figure 1 shows the overview of South dumping area failure from the coal bunker point. The process lasted approximately 10 minutes. The volume of sliding mass was approximately 11 Mm3 (Zhu, 1994; Duan et al., 1999). The dumping area sliding caused a huge loss to Antaibao open pit coal mine. The loss is 6 person’s life, 14 devices, car wash area, guard room of mine, 2 houses of citizen, 0.73 km highway, 0.44 km drainage channel, and highway in the industrial area.
