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Hydrological Characteristics Analysis on the Filling Aquifer of Nihe Iron Mine

KANG Cai-qin1,CHEN Zhi-hua2(1.Graduate School,China University of Geoscience,Wuhan 430074,China; 2.School of Environmental Studies,China University of Geoscience,Wuhan 430074,China)  
The depth of the main body of Nihe iron mine is more than 700 meters,and its indirect water source is secondary quartzite aquifer,whose recharge source and route are very significant for the mining.On the basis of the hydrological conditions,this paper analyzes the conditions of groundwater recharge,runoff and discharge,formation process and hydrochemical composition characteristics of the deep groundwater.The results show that: secondary quartzite aquifer is located upon the main body,and there is no correlation between the dynamic variation of groundwater level and precipitation;the pumping tests reveal that there is only very weak hydraulic connection between the aquifer and upper Shuangmiao fissure aquifer,and the aquifer only obtains some lateral recharge through the fissures.The evolution process of Luzong volcanic basin makes the environment state of secondary quartzite aquifer semi-closed or closed.The concentrations of SO2-4 and salinity are higher than other hydrochemistry components in secondary quartzite groundwater,which is the same with the characteristics of Luohe iron mine nearby.From the above results,the qualitative judgment is that the aquifer groundwater resource has static storage capacity,which is conducive to the drainage of the mine water.The paper has the guidance on the prevention and treatment of mine water.
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