Source identification of mine water inrush based on the exponential whitenization function and the grey situation decision model

Coal mining at deep levels can cause mine water inrush and groundwater contamination, making it important to accurately rapidly identify the source. In this study, 52 samples were extracted from three types of aquifers in Linhuan area, China. The sample components Na + K , Ca 2+ Mg HCO 3 − Cl SO 4 2− measured experiment, used as evaluation variables, piecewise function equation was established by using exponential whitening function. Finally, combined with data CRITIC weighted grey situation decision-making method, comprehensive membership degree obtained, source identified according principle maximum degree. accuracy model 92.3%. traditional method uses linear determine value, ignoring that value outside adjacent level is 0, which improves weight level, causes loss effective information, reduces discrimination rate. whitenization paper will solve problem further discriminate source, would also be beneficial regarding prevention control contamination.