摘要
我国南方花岗岩风化层中多赋存稀土等矿床,开采工艺主要为溶浸采矿工艺。溶浸采矿工艺主要是通过钻孔向花岗岩风化层中注入化学试剂,从浸出点抽取浸出液以获得所需元素。工艺显著的环境影响是化学试剂将会直接参与到区域内的水文地球化学循环,并改变水化学类型。本次对矿区花岗岩风化层水资源的水化学特征进行分析,结果表明,天然条件下矿区水化学类型以HCO_3-Na、HCO_3-Ca·Na和HCO_3-Na·Ca为主,而溶浸采矿条件下,水化学类型以SO_4-Na·Ca、或SO_4-Ca·Na为主。该研究结果对未来矿山开采水环境保护提供了有益借鉴。
There are many rare earth deposits in the granite weathering layer in South China, and the main mining technol- ogy is the solution mining technology. The leaching process is mainly to inject chemical reagents into the granite weathering layer by drilling, and extract the leaching solution from the leaching point to obtain the required elements. The significant envi- ronmental impact of the process is that chemical agents will be directly involved in the regional biogeochemical cycle, and change the hydrochemical type. The results show that the water chemistry types are mainly HCO3 - Na, HCO3 - Ca · Na and HCO3 - Na · Ca, while the water chemical types are mainly SO4 - , Na · Ca, or SO4, - Ca. and Na under the condition of solution mining. The results of this study provide a useful reference for future mine water conservation. The research results will be useful for future water environment protection in mining.
作者
包国良
BAO Guo - liang(Fujian geological survey and Research Institute, Fuzhou, Fujian, 350013, China)
出处
《地下水》
2017年第5期21-24,共4页
Ground water
关键词
溶浸采矿
风化层
水化学
水文地球化学循环
leach mining
weathering layer
hydrochemistry
hydro geochemical cycle
