Interpreting Mine Water Sources and Determining Mixing Ratios Based on the Spatial and Chemical Characteristics of Bedrock Brines in a Coastal Mine

Water inrush caused by mining below the seafloor seriously affects safety and production of mines. Identifying end element mine accurately calculating mixing ratios elements are basis for a reasonable evaluation water risk. Based on hydrogeochemical stable isotope indexes, combined with spatial distribution characteristics brine, classification brine in study area was preliminarily determined as follows: shallow middle deep (while previous studies have only classified bedrock one category). Hierarchical multi-index analysis used to identify different sublevels, an end-element mixed model according results four pairs indexes (Cl−–δ18 O, Cl−–Ca2+, Cl−–Mg2+, Cl−–Na+). Through comparison deviation studies, it shown that this method is suitable mine-water-source identification when under complex hydrogeology conditions. According calculation ratio, seawater ratio shows, within process, trend first increasing, then decreasing, finally stabilizing. This controlled disturbance stress, self-weight tectonic stress. The vertical zonation proportions indicates mainly recharges through fractures. difference proportion at points −600 m sublevels F3 fault northwest water-conducting fracture zone may be preferred flow channels recharge water. research great significance promote safe coastal mines around world.