东刘家金矿矿区地下水动态与均衡分析

东刘家金矿矿区位于海阳市郭城镇,主要发育3组NE向断裂裂隙,含水岩组主要为第四系冲洪积、坡积孔隙含水岩组,碎屑岩类孔隙裂隙含水岩组,碳酸盐岩类岩溶裂隙含水岩组及基岩风化带裂隙含水岩组。文中在查清水文地质条件的情况下,详细分析了矿区含水层的富水性,地下水补给、径流、排泄及动态特征,矿区地下水开发利用现状。在此基础上,进行了地下水均衡计算,地下水补给来源主要为大气降水入渗和农灌入渗补给,补给方式为地表直接下渗补给、断裂带导水补给以及上覆松散层下渗补给,主要排泄方式为人工开采、矿坑涌水和蒸发,总体上矿区处于地下水均衡状态。研究成果为矿区在今后的开采过程中控制地下水,合理防治与排水,维持区域地下水自然动态等提供了科学的依据。。

Analysis of Groundwater Dynamic Balance in the East Liujia Gold Mine

The East Liujia Gold Mine locates in Guocheng Town of Haiyang City, where three groups of fault ifssures are developed. Within the mining area, the types of aquifers have contained Quaternary alluvial and diluvial slope deposits of pore groundwater, clastic rock pore and fissure groundwater, carbonate karst fractured containing groundwater and the weathering of bedrock ifssure zone groundwater. In this paper, hydrogeological condition has been discussed, including the groundwater yield property, aquifer, the aquifuge, the recharge, run-off, discharge of groundwater, the dynamic characteristics, the exploitation and utilization of groundwater and so on. Furthermore, assessment of groundwater quantity balance has been done, according to the groundwater environment protection for mining area. The main recharge of groundwater includes meteoric water in inifltration, agricultural irrigation inifltration. The way of recharge has been not only the direct recharge from surface to underground, but also along the fracture belt and the overlying unconsolidated layers seepage. The main discharge of groundwater has always been artificial mining, the mine water inflow and evaporation. The calculation shows that the whole mining area has been in the state of quantity balance. The work may provide some scientific guidance for the exploitation and drainage of groundwater in the future, maintaining the regional groundwater system of the East Liujia Gold Mine.