Three-dimensional Geological Model And Prediction Of Water Discharges Of Shaqu Coal Mine In Shanxi

Shaqu coal mine is the first large-scale modernization of the mine of Liliu development and construction mine, its ida area is 138.3535km2,which located in the middle of Hedong coal, it belongs Liulin spring or karst water system in hydrogeological unit. There are some water damage such as:mine water inrush, collapse inrush of water and other hazards.With the face of continued expansion of production, mine geology and hydrogeologic conditions are more and more complex, in order to ensure mine safety in mining, the establishment of three-dimensional geological model and prediction for discharge have an important practical significance.After years of exploitation of mines, we have accumulated a large number of borehole data and geological hydrological data. In this paper, we use the Solid module of GMS groundwater modeling software to build the three-dimensional geological model of mine, and image that the scattered geological information which is collected. Geological model of the software can be cut in any direction, and can show stratigraphic distribution in different zones, it also can achieve any level of profile elevation display space, and intuitively display the image of the level of mine production structure formation.In this paper, we establish the geological model which is based on the conceptual models, and further establish the complete finite difference mathematical model of unsteady flow,and use MODFLOW module of GMS software to establish numerical model. The simulated water level observation hole and measured values are in good by model identification verification, therefore, we can use this model for settlement prediction. Prediction results as follows:3#+4# coal dewatering time of the limestone is 20 days, dewatering discharge to 6795.0m3/d; 8#+9# coal group ordovician aquifer drainage of the peak time of 35 days, sparse reduced water yield for the 31536.0m3/d.According to forecast results and mine discharge situation, we propose surface water control measures and underground water control measures, In connection with the actual situation of production for the mine, we should develop and implement long-term water control plan.