中国矿山工程

Based on the open-pit slope monitoring programme of an iron mine in Anhui Province, open-pit slope stability was studied by combining exploration and simulation, and control measures were proposed herein. Based on SSR method, finite element models were built respectively under natural working conditions, seepage effect and working conditions reinforced with prestressed bolts by use of the COMSOL Multiphysics numerical simulation software. As indicated by study results, the slope was stable under natural working conditions. However, slope stability became poor under seepage effect, with a safety factor of only 1.12, featured by the formation of circular slip, inside to surface, bottom to top. After reinforcement with prestressed bolt, the slope became stable in spite of seepage effect. The research results can provide an empirical reference for the safety management and protection of similar open-pit slopes.