Application of GIS in Prediction of Ordovician Limestone Water Inrush from Seam Floor in Nanding Coal Mine(China)

For exploiting safely in deep area of Nanding coal mine in Shangdong province of China, this paper have used multi-originated information complex to predict fatalness of water inrushing from seam floor during mining. This paper analyzed main factors which affect water inrush from seam floor with the function of multi-originated of GIS in Surfer software to modify the method of water inrush coefficient and built model of water inrush index adapt to the coal mine. The coal mine was divided into three areas, dangerous areas and relative dangerous areas and safe areas with the model when the tenth coal seam was mined. The results show that water inrush from floor are result by various factors working together, geologic structure play a control action, hydraulic pressure and mining pressure are the dynamic condition, aquifuge takes the restriction effect. The result of prediction will guide Nanding coal mine exploit safely in deep area.