甲玛多金属矿露井联采条件下露天边坡稳定性评价

为了研究甲玛多金属矿在露井联采工况下,地下开采对露天矿边坡稳定性的影响,采用数值模拟方法,结合该矿山工程地质条件及采矿方法,建立大型三维地质模型进行计算分析。结果表明,大规模地下充填开采后,顶板覆岩发生一定程度的下沉,在矿体回采及充填过程中,对于覆岩的支撑作用主要靠盘区柱及盘区周边的围岩实现。地下矿体回采结束后,角岩露天坑的西边帮区域变形相对剧烈,但该区域变形量较小。因此,大规模地下充填开采对于露天边坡稳定性的影响甚微。

Stability Evaluation of Open-face Slope under Combined Mining Conditions of Jiama Polymetallic Mine

In order to study the influence of underground mining on the stability of open pit slope under open-underground combined mining conditions, this paper uses numerical simulation method, combined with the engineering geological conditions and mining methods of the mine to establish a large-scale three-dimensional geological model. Perform calculation analysis. The analysis results show that the roof overburden after a large-scale underground filling mining has a certain degree of subsidence. During the mining and filling process of the ore body, the supporting effect on the overburden is mainly achieved by the surrounding column and the surrounding rock around the panel. After the mining of the underground ore body is completed, the western side of the crater pit is deformed relatively strongly, but the deformation of the area is small. Therefore, large-scale underground filling mining has little effect on the stability of open slopes.