Abstract：The rockfall has become the most important problem in some high-steep rock slope engineering. Taking the rockfall at Baiyunebo East Iron Mine as an example，the influence factors of rockfall，the rockfall movement track，and the interaction mechanism between the rockfall and the slope are analyzed. An orthogonal experiment based back-analysis confirmed that the normal and tangential restitution coefficients of the rockfall are the main factors affecting the maximum horizontal displacement of the rockfall，and the parameter for the rockfall analysis is determined. At the same time，the probability method is used to predicate the deep-excavation induced rockfall，and the strength and geometry parameters of barriers are designed according to the spatial and kinetic distribution of the rockfall. It shows that the orthogonal experiment method and the probability based rockfall forecasting are feasible tools for evaluating the rockfall hazard and designing the protective construction. The proposed method can be useful for other similar high-steep rock slope.
