Abstract: Based on groundwater level and dewatering rate monitoring as well as the regional hydrogeological investigation and pumping tests at Chaoyang open-pit coal area, the numerical groundwater simulation model is developed for the purpose of dewatering schemes analysis. The integrated scheme, with considerations of ground dewatering wells, horizontal dewatering wells and dewatering hole, is proposed for different periods of mining. The simulation results illustrated that the scheme is feasible and effective for the dewatering systems. The maximum dewatering rate simulated is approximately 45000 cubic meters per day. The research results are meaningful for the decision of water control for the coal mining.