Numerical Simulation of Coal Mining on Groundwater System Disturbance in Shallow Buried Coal Seam of Western Mining Area

For the problem of groundwater disturbance caused by shallow buried coal seam mining in western mining area, it is concluded that the water flowing fractured zone formed by coal seam mining directly exposes loose aquifer disturbance mode. We propose a numerical method to deal with the contact zone between overlying rock fissure and aquifer into a kind of water head boundary, and construct a numerical model of groundwater disturbance in Bulianta Coal Mine of Shendong Mining Area. The simulation results show that groundwater level had been dropped more than 30 m (to 2012), the loss of groundwater resources is about 1.90×10⁴ m³/d due to the mining disturbance.