Determine Limit Tier of the Dump by Application of Numerical Analysis Method

In view of the situation that the dump site of Fushun rich in iron ore, this paper adopts the method of numerical analysis to build three-dimensional numerical model of mine to get the overall safety factor and potential sliding surface through strength subtraction. According to one of the most dangerous section, plane numerical model is established to analyze overall safety coefficient in the process of mine pile row and influence of lowering in ore body stopping process on mine. The results show that the mine lift and its safety show coefficient linear relationship, when the safety coefficient is equal to 1.0 the theory of tall is 324 m. When the ore body stopping below back, the stability of the dump increases slightly with the increase of stopping span, potential instability forms to point to the caving. In this paper if of bright engineering characteristics and the calculation results can provide reference for similar projects.