The sewer drainage in mining certainly will lead to the change of groundwater recharge,runoff and discharge in the regional groundwater system,and further cause the environmental geological problems such as groundwater recession and water resource exhaustion around. According to the geologic structure and hydro-geological condition of the Duancun-Leigou Mining in Sanmenxia City,the hydro-geologic model of aquifer system is generalized,the numerical model of groundwater flow is established,and then finite di...