驻留矿体地下开采的安全距离探讨

Discussion on Safety Distance of Underground Mining in Residual Orebody

露天边坡下驻留矿体开采是露天矿山生产后期经常遇到的问题,露天与地下同步开采时的安全问题尤为关键。结合永平铜矿驻留矿体的开采情况,运用FLAC3D对驻留矿体开采进行了数值模拟研究,分别对11种设计方案进行分析对比。最后得出,在满足采场安全和边坡稳定的条件下,驻留矿体的开采边界与露天边坡之间的最优安全距离为22 m。

The mining of residual orebody of open pit slope is a common problem in the later stage of open pit mine production, the safety problem is especially critical in simultaneous mining of open pit and underground. Based on the mining practice of residual orebody in Yongping Copper Mine, the research on numerical simulation is carried out for the mining of residual orebody by using FLAC3D, the proposed 11 design schemes are respectively analyzed and compared. The result shows that the optimum safety distance between the mining boundary of residual orebody and open pit slope shall be 22 m under the condition of satisfying stope safety and slope stability.