作　　者： ; ;

机构地区： 华南理工大学自动化科学与工程学院安全科学与工程研究所

出　　处： 《矿业研究与开发》 2012年第2期26-28,共3页

摘　　要： 民采空区走向是影响露天矿边坡稳定性的重要因素之一。在现场调查的基础上,采用有限元法分析了不同民采空区走向下边坡的位移场和应力场。研究结果表明:民采空区走向与边坡面斜交时,顶板拉应力集中程度最高,在外力扰动下发生坍塌、导致边坡失稳的可能性最大;民采空区与边坡面平行或垂直时,顶板应力集中程度较小,民采空区的存在对边坡稳定性影响不大。 The strike of mined-out area formed by illegal mining is one of the important factors affecting the slope stability in open-pit mine.On the basis of field surveys,the displacement and stress fields of the slope under different strike of mined-out areas were analyzed using finite element method.The results of numerical analysis showed that when the strike of mined-out area is oblique with slope surface,the concentration degree of tensile stress in the roof of mined-out area is the highest,and slope instability caused by the roof collapse of mined-out area will easily occur under external forces;when the strike of mined-out area is parallel or orthogonal with slope surface,the concentration degree of tensile stress in the roof of mined-out area is lower,the existence of mined-out areas have little effect on slope stability.

关 键 词： 露天矿 民采空区 空区走向 边坡稳定性 数值模拟

领　　域： [矿业工程] [矿业工程]