疏干排水在露天矿山的应用

Application of Dewatering and Drainage in Open-pit Mines

地下水是影响露天边坡稳定的重要因素。非洲某矿山水文地质条件复杂,严重影响了露天开采时边坡稳定性。通过分析该矿山地下水赋存情况,涌水量大小,来布置排水钻孔的位置和钻孔深度。采用深井泵的方式对地下水进行疏干,并根据钻孔深度和涌水量大小进行设备选型计算,从而降低露天采坑地下水位标高,使地下水位标高低于露天开采工作面标高,来增加露天边坡稳定性,保证露天开采时边坡安全。

Ensuring slope stability is a critical consideration in open-pit mining operations,with groundwater serving as a key factor influencing the stability of exposed slopes.The hydrogeological conditions at a specific mine in Africa are characterized by com‐plexity,significantly impacting the stability of open-pit slopes during mining activities.This paper presents an analysis of the subter‐ranean water distribution and volumetric inflow within the mine to inform strategic placement and depth determination for drainage boreholes.Groundwater dewatering is accomplished through the implementation of deep well pumps,with equipment selection and sizing tailored to borehole depth and inflow rates.By effectively reducing groundwater table elevations within the open-pit excava‐tion area,this approach ensures that they remain below working face elevations,thereby enhancing slope stability and guaranteeing safe open-pit mining operations.