A new practical methodology of the coal floor water bursting evaluating IV:the application of AHP vulnerable index method based on GIS

In order to solve the difficult evaluation problems on the coal floor water bursting,based on the establishment of the main controlling index system of the floor water bursting and theory of the vulnerable index method,the coal floor water bursting in the north mining area of Donghuantuo Coal Mine in Kailuan was studied.On the basis of analyzing the hydro-geological conditions and the floor water bursting rules of the coal mine,six main controlling factors that influencing floor water bursting were determined.Then,the six sub-thematic layers of each dominating factor and the overlay layer were founded using the data management and the spatial-data analysis of GIS.And through the application of AHP,the weight coefficients of each main controlling factor were determined in the process of floor water bursting,thus the type of AHP vulnerable evaluation model based on the GIS of floor water bursting was established.Furthermore,the thresholds of floor water bursting sub-zone were confirmed according to the statistic graphical analysis of the obtained water bursting vulnerable indexes through the model calculating.Finally,the project of the floor water bursting vulnerable zone was raised.