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Hydrogeochemical Characteristics and Groundwater Inrush Source Identification for a Multi-aquifer System in a Coal Mine

引用

Acta Geologica Sinica(English Edition) 2019年第6期93卷 1922-1932页

作者： ZHANG Haitao XU Guangquan CHEN Xiaoqing WEI Jian YU Shitao YANG Tingting School of Earth and Environment Anhui University of Science and TechnologyHuainanAnhui232001China Geological Survey Department Gubei Coal MineHuainan Mining GroupHuainanAnhui232001China

Correct identification of water inrush sources is particularly important to prevent and control mine water *** analysis,Fisher discriminant analysis,and geothermal verification analysis were used to identify and verify the water sources of the multi-aquifer groundwater system in Gubei coal mine,Anhui Province,North *** show that hydrochemical water types of the Cenozoic top aquifer included HCO3-Na+K-Ca,HCO3-Na+K-Mg and HCO3-Na+K,and this aquifer was easily distinguishable from other aquifers because of its low concentration of Na++K+and Cl-.The Cenozoic middle and bottom aquifers,the Permian fissure aquifer,and the Taiyuan and Ordovician limestone aquifers were mainly characterized by the Cl-Na+K and SO4-Cl-Na+K or HCO3-Cl-Na+K water types,and their hydrogeochemistries were ***,water sources could not be identified via hydrochemical *** model was established based on the hydrogeochemical characteristics,and its discrimination rate was 89.19%.Fisher discrimination results were improved by combining them with the geothermal analysis results,and this combination increased the identification rate to 97.3%and reasonably explained the reasons behind two water samples *** methods described herein are also applicable to other mines with similar geological and hydrogeological conditions in North China.

关键词： water inrush source multi-aquifer hydrogeochemistry Fisher discrimination geothermal verification analysis coal mine

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