基于 FLAC3D 数值模拟的某矿山不同采矿方法对比

摘要

以云南某缓倾斜薄至中厚磷矿体露天转地下开采为工程背景，根据赋存条件、矿体厚度、矿层倾角和地质勘探线剖面，确定主要两种采矿方法为崩落法和充填法，采用有限差分软件 FLAC3D 数值模拟方法对采场出现位移的变化规律进行研究，得出了充填法开采沉降位移影响范围明显减小，对于缓倾斜薄至中厚矿体，开采方法也是露天转地下，为其选择及优化提供依据。%To Yunnan a slow inclined thin and medium thick phosphorus ore open-pit to underground mining engineering background,combined with seam occurrence condition,ore body thickness,obliquity and geological prospecting line profile,primary caving method and the method of filling two mining method,using the finite difference software FLAC3D numerical simulation method of displacement behavior were studied,it is concluded that fill mining method mining subsidence displacement effects are reduced obviously. This paper provides a basis for the selection and optimization of open pit underground mining method for similar gently inclined thin to medium thick phosphorus ore body.