大规模地下采矿对露天-井工协同开采影响分析（增刊）

本文针对甲玛铜多金属矿露天-井工协同开采问题,采用数值模拟、相似模型试验和有限元强度折减法分析了大规模地下充填开采的覆岩移动特性和大规模开采对露天边坡稳定性的影响。分析结果表明,大规模地下充填开采后覆岩产生一定程度的下沉,开采引起的地表变形相对剧烈区域包括了角岩露天坑的西边帮区域。相似模型实验与数值模拟变形趋势一致,上覆岩层的位移在嗣后充填后得到了有效控制。大规模地下充填开采对于边坡的稳定性影响甚微。

Impact analysis on large-scale underground mining for coordinated mining of open-pit

Aiming at the problem of coordinated mining of open-pit and underground mining in Jiama copper polymetallic, this paper analyzes overlying strata movement features and stability impact of open-pit slope caused by the large-scale underground filling mining by methods of numerical simulation, similar model test and FEM strength reduction methond. The results show that certain subsidence of overlying strata is caused by the large-scale filling mining and relatively severe areas of surface deformation includes of west slope of Jiaoyan open-pit. Deformation trend is consistent between similar model test and numerical simulation, so overlying strata displacement is controled effectively after filling mining. Large-scale filling mining has little effect to the stability of Jiaoyan open-pit.