Hydro-geochemistry evolution in Ordovician limestone water induced by mountainous coal mining: A case study from North China |
| |
| Institution: | North China Institute of Science and Technology, Sanhe 065201, China;National Engineering Research Center of Coal Mine Water Hazard Controlling(Suzhou University), Suzhou 234000, China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 100077, China;North China Institute of Science and Technology, Sanhe 065201, China |
| |
| Abstract: | This research aimed to investigate the changing mechanism of hydro-geochemistry in Ordovician limestone karst(OL) water induced by mountainous coal mining activities. Thus, the hydrogeochemistry evolution of OL water over 40 years within a typical northern mountainous coal mine named Fengfeng Mine was studied by using Piper diagram, Gibbs scheme, ions correlation and Principal component analysis(PCA) methods. Results showed that, except for HCO_3~-, the ions of Ca~(2+), Mg~(2+), SO_4~(2-),Na~++K~+, Cl~- and total dissolution solids(TDS) values all increased by years as mining continues. Different hydro-geochemical characteristics in different periods can reflect different water-rock interactions.Accordingly, sulfates dissolution gradually took place of carbonates in water-rock interaction. Especially,OL water-rock interactions in different periods were all affected by rock weathering and evaporationconcentration together. At last, evaporationconcentration co-effect dominated the hydrogeochemistry evolution slowly, along with significant cations exchange over years. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
