露天矿疏干降水数值模拟及优化分析

根据朝阳露天矿水文地质勘探、抽水试验资料、矿山实际疏干排水量与地下水动态观测，建立了矿区三维地下水数值模拟模型，确定了地面降水孔降水、采场内水平放水孔排水、泄压坑排水等多种方式联合的综合疏干降水方案，并运用地下水数值模型进行模拟预测和方案优化。预测结果表明提出的“降水孔-水平孔-泄压坑”排水方案是高效可行的，模拟得到最大矿区排水量为45000m/d。研究成果可为矿区降水方案设计提供依据。

Numerical Simulation and Analysis of Dewatering Scheme for Open-pit Mine

Based on groundwater level and dewatering rate monitoring as well as the regional hydrogeological investigation and pumping tests at Chaoyang open-pit coal area, the numerical groundwater simulation model is developed for the purpose of dewatering schemes analysis. The integrated scheme, with considerations of ground dewatering wells, horizontal dewatering wells and dewatering hole, is proposed for different periods of mining. The simulation results illustrated that the scheme is feasible and effective for the dewatering systems. The maximum dewatering rate simulated is approximately 45000 cubic meters per day. The research results are meaningful for the decision of water control for the coal mining.