Abstract：Outstanding issues for floor high confined water is the most threat to coal layer safe extraction in coal mine water disasters threat,it has an important theoretical guiding significance and practical value for accurately forecasting coal floor water disasters. According that water-inrush from coal floor is affected by many factors and has nonlinear characteristics,this paper established a forecasting evaluation model considering complex multi-factors and combined a fuzzy comprehensive evaluation method and a comprehensive weight method based on a coal-floor water bursting evaluation-index system integrating of quantitative and qualitative indexes. The weighing values are determined by comprehensive weight in the model,the subjective and the objective weight are combined with the comprehensive weight. Finally,applying this coupling evaluation model to evaluate floor water disasters of Danhou coalmine in Hebei,the evaluating effect is well. It can provide a certain reference and a basis for the evaluation of water-inrush from coal floor forecast in the future.

Keyword：coal floor water bursting;fuzzy comprehensive evaluation;comprehensive weight;