基于GMS-MODFLOW的露天矿地下水流量预测数值模拟研究  

Numerical Simulation of Groundwater Flow Prediction in Open-pit Mine Based on GMS-MODFLOW

作　　者：周旭 ZHOU Xu(CRCC International Investment Co.,Ltd.)

机构地区：[1]中铁建国际投资有限公司,北京市石景山区100049

出　　处：《现代矿业》2024年第8期214-218,共5页Modern Mining

摘　　要：某露天矿区地下水分布主要受岩体断层、裂隙等地质结构主导,开采过程中将对边坡稳定性和矿坑内排水产生影响。为预测矿区地下水量和矿坑排水条件,采用多段封隔器压水试验和变水头压水试验对岩质边坡岩体水力传导系数进行分析。在构建矿区水文地质概念模型的基础上,运用GMS软件MODFLOW模块建立了矿区岩体三维有限差分数值模型,研究了非饱和-饱和渗流模型中稳态和瞬态条件下地下水量动态变化,阐述了边坡降雨入渗导致地下水位上升和饱和区形成发展过程,分析了敏感条件下矿区地下水位分布变化,提出了按照开采深度进行不同的矿坑排水管理策略。The distribution of groundwater in an open-pit mine area is mainly dominated by geological structures such as rock mass faults and fissures.The mining process will have an impact on slope stability and drainage in the mine.In order to predict the groundwater volume and mine drainage conditions in the mining area,the hydraulic conductivity coefficient of rock slope rock mass is analyzed by multi-stage pack⁃er water pressure test and variable head water pressure test.On the basis of constructing the hydrogeological conceptual model of the mining area,the three-dimensional finite difference numerical model of the rock mass in the mining area is established by using the GMS software MODFLOW module.The dynamic changes of groundwater flow under steady-state and transient conditions in the unsaturated-saturated seepage model are studied.The process of groundwater level rise and the formation and development of saturated zone caused by slope rainfall infiltration are expounded.The distribution of groundwater level in mining area un⁃der sensitive conditions is analyzed,and different mine drainage management strategies according to mining depth are proposed.

关 键 词：露天矿 多段封隔器测试 岩体水力传导率 数值模型 地下水分布 

分 类 号：TD804[矿业工程—矿山开采]