摘要
泥河铁矿主要矿体埋藏深度达700m以上,其围岩次生石英岩构成的含水层为泥河铁矿的间接充水水源,其地下水的补给来源和补给途径对矿区开采有着不可忽视的关键意义。本文从水文地质条件出发,对泥河铁矿深层含水层的补径排条件、形成过程及水化学组分特征进行了研究。结果表明:深部次生石英岩含水层位于泥河铁矿主矿体之上,其水位动态与大气降雨动态不相关,抽水试验揭示其与上部双庙组熔岩裂隙含水层之间水力联系不密切,该含水层只能通过熔岩裂隙接受微弱的侧向补给;推测在庐枞火山岩盆地演化的大环境下次生石英岩含水层的形成环境属半封闭-封闭状态,泥河矿区内该含水层地下水的水化学组分和附近成矿原因相似的罗河铁矿区相同含水层地下水的水化学组分均呈现硫酸根浓度、矿化度含量异常高的特征也证明了这一结论,从而可定性判断该含水层的地下水属于静存储量,有利于矿区的疏干排水,对矿区防治水有一定的指导意义。
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 SO4 2- and salinity are higher than other hydrochemistry compo nents 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 capaci ty, which is conducive to the drainage of the mine water. The paper has the guidance on the prevention and treatment of mine water.
出处
《安全与环境工程》
CAS
北大核心
2013年第3期126-129,134,共5页
Safety and Environmental Engineering
关键词
次生石英岩层
深层地下水
水文地质条件
水化学组分
庐枞火山岩盆地
泥河铁矿
secondary quartzite
deep groundwater
hydrological condition
hydrochemical characteristics
Luzong volcanic basin
Nihe iron mine
