Hydrogeochemical Characteristics of a Multi-Layer Groundwater System in a Coal Mine Area: A Case Study

The Yanzhou coalfield is an important coal production base in north China, wherein a huge amount of mine drainage has occurred; however, there been relatively little research on the multi-layer groundwater system. In this study, Dongtan Coal Mine was considered as object and total 95 samples were collected. Furthermore, hydrogeochemical statistical methods employed to better understand characteristics system coalfield. results show that area alkaline. Ordovician limestone aquifer quite different from other aquifers, karst herein shows regional distribution characteristics. During evolution groundwater, more carbonate sulfate dissoluted, cation exchanged, lesser extent silicate weathering halite dissolution occurred. A conceptual hydrogeological model created. It changes conditions further resulted water chemistry being complex, induced evolution. dynamic field hydrochemical should be studied properties accordingly make preparations for preventing disasters environmental pollution.