Numerical simulation of water invasion of No.5 Mine in the Fengfeng Coalfield

Numerical simulation of groundwater flow and prediction of drainage in the No.5 mine of the Fengfeng coal mine area are presented in this paper,using the data from a water invasion.A mathematical model of groundwater flow is built on the basis of the analyses of the hydrogeological conditions.The model is verified with the water invasion data.The measured and simulated water levels fit well during the model verification.The mine drainage is predicted using the established model.The results indicate that the coal mining below-100 m will result in a large amount of drainage and relative high cost.