Hydrochemical Characteristics of Mine Water and Their Significance for the Site Selection of an Underground Reservoir in the Shendong Coal Mining Area

Underground reservoir technology can mitigate water shortage and pollution problems in coal mining areas has a good application prospect. While still new technology, the theory method of underground reservoirs need to be improved. This research focused on hydrochemical characteristics mine their significance for site selection reservoirs. With Shendong area as case study, major ions, toxicological indexes, stable isotopes hydrogen oxygen were tested samples, quality was quantitatively evaluated origins over-limit variables investigated by hydrogeochemical numerical simulation ionic ratio analysis. The influencing factors analyzed discussed. results show that main over-standard are Na+, F−, SO42−, TDS, sodium ion adsorption (SAR), strong positive correlation exists between F− SAR negative Ca+. Na+ originates from dissolution halite silicate rocks, well reverse cation exchange. exchange displacement OH− alkaline adsorbed surface minerals. On whole, is better east than west WL River. water–rock interactions goaf increase concentrations Ca2+ SAR. where samples have low values, such shallow seams at SGT, DLT, mines, favorable sites reservoir. outcomes may benefit reasonable similar with shortage.