Taking XinYang coal mine for an example, water samples was obtained from different aquifer, the component of characteristics ion of each aquifer were studied by using clustering analysis method. The underground gushing bursting water layer and water supply were analyzed by using SPSS statistical software. The results showed that the source of water in uncertain aquifer was Karst fissure water in the Ordovician. This method is simple and easy to learn, and the investment is little, the effect is good.