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丘陵地区地下水资源相对紧缺,然而为保证矿区安全开采,地下开采工程要求排出大量的地下水,尤其是承压水的流失对上覆渗水性强的含水层水位下降可能存在不可忽视的影响,甚至影响到周边居民的饮水安全。为此,本文以皖西丘陵地区霍邱铁矿群开采为例,在建立地下水水流数值模型基础上,分析采矿排水对上覆第四系孔隙水的影响程度,结果表明:矿床持续开采5年后,研究区内第四系地下水水位的累积附加降深等值线超过5m的面积约为183.5km2,占研究区总面积的13.90%;持续开采到第10年末,影响范围增大至209km2,扩大了近26km2,且局部出现含水层疏干现象。
Groundwater resources are relatively scarce in hilly areas. However, in order to ensure safe mining, underground mining projects require large amounts of groundwater to be drained. In particular, loss of confined water may have an irreversible effect on the water level drop of overlying seepage water and may even affect Drinking water to nearby residents is safe. Therefore, based on the numerical simulation of groundwater flow in Huoxiu Iron Mine Group in western Anhui hilly region, this paper analyzes the influence of mining drainage on the pore water in the overlying Quaternary. The results show that: The area of more than 5m in the additional contour of additional groundwater of the Quaternary groundwater in the study area is about 183.5 km 2, accounting for 13.90% of the total area of the study area. By the end of the 10th consecutive year, the area of influence increased to 209 km 2, Expanding nearly 26km2, and the local aquifer dehydration.