ABSTRACT
In Xiaotun coalmine, there are many factors that affect water-filling, e.g. effective rainfall, goaf water, mining cranny, surface water system, aquifer system and tectonics. The relative importance of these factors varies with different coal exploitation. In this paper, firstly, every factor is analyzed in detail to judge whether it affects the water filling or not, and six coverages of each factor are built according to practical situation of Xiaotun coalmine. Secondly, AHP is used to calculate the comparative importance of these factors. After recognizing and adjusting parameters repeatedly, a GIS model can be built by using the function of strong spatial operation.
