大恒煤矿开采对地下水疏干的影响

Influence of Mineral Exploration on Groundwater Drainage in Daheng Coal Mine

应用Visual Modflow建立了水文地质概念模型和数学模型,以山西省朔州市平鲁区大恒煤矿开采为例探讨了其对地下水水位和水量的影响。在对矿界周边50km2的范围内水井水位进行调查的基础上,依据划分的各采区开采时间,结合区域地下水埋藏深度与地层走向和调查范围内各个时期水井水位埋深的监测,对大恒煤矿的开采进行建模并验证了模型的准确性。研究结果显示,大恒煤矿开采28.8a之后会形成面积9.5km2,深度55m的降落漏斗,表明煤矿开采会使上覆含水层水位下降并形成降落漏斗,对地下水资源造成严重破坏。

Hydrogeological conceptual and mathematical models were established by Visual Modflow, then taking Daheng coal mining as an example to explore the impacts on groundwater level and quantity in Shuozhou City of Shanxi Province. We conducted an investigation of water level in wells within the scope of 50 km2 around the mining boundary. According to the mining time of each mining district, and combining with the regional groundwater buried depth and regional stratigraphic trend, as well as the monitoring results of the well water level during various periods within the scope of investigation, a model on Daheng coal min- ng and verification of the accuracy of the model was constructed. The result showed that the coal mining of ）aheng mine will cause the cone of depression 28.8 years after mining, which has an area of 9.5 km2 and tepth of 55 m. It indicated that coal mining will make the overlying aquifer drawdown and the formation of he cone of depression.