Abstract:Faults and folds are the key factors causing water inrush in mine. In order to study the seepage characteristics of direct water falling aquifer existing faults and sliding structure,roof aquifers of coal seam No.47 are simulated using finite difference software,MODFLOW,based on the analysis of hydrogeological conditions in Ningzhuang coalmine. Seepage fields of roofs of coal seam No.47 from 2003 to 2006 are simulated through spatial dispersing,stress field determining,wall treat of faults and input of sources and sink items. Then,aquifer model is established. Finally,seepage field laws after 5 and 10 years later are presented. It is shown that the water level of roof aquifer is higher,while in the place of sliding structure in mining,the water inrush risk is still high.