Risk Assessment of Ground Water Inrush from Underlying Aquifers Based on Fuzzy Comprehensive Evaluation and its Application

Mining operations in China are often threatened by frequent water inrushes from confined karst aquifers, We need to evaluate the risk from water-inrush from coal floors in order to have safe production in mines. water inrush risk assessment method based on fuzzy comprehensive evaluation is introduced in this paper. A secondary fuzzy comprehensive evaluation system is constructed to evaluate the risk of floor water invasion in coal mines. Four first-grade indices and fifteen second-grade indices are determined based on the principles. The weight of every index is rationally distributed by analytic hierarchy process (AHP). Finally applying the evaluation model based on fuzzy comprehensive evaluation to evaluate floor water disasters of Yuzhou coalmine in Hebei, the evaluation results are accurate. It can provide certain reference and basis for the evaluation of water-inrush from coal floor forecast for the future.