基于大型放水试验的矿区流场演化规律模拟研究

 基于地下水井流理论，通过大型干扰井群放水试验，查明了矿区深部煤层底板太灰含水层的富水性、补径排条件及其和下伏奥灰含水层的水力联系，在此基础上运用FEFLOW软件对本次大型干扰放水试验进行了数值模拟计算，与解析解互相对比、验证，克服了构造复杂矿区解析法适用的局限性。综合结果表明太灰含水层径流条件较好，岩溶相对发育，且富水性不均一，与下伏奥灰水水力联系极其微弱，区内孟口断层阻水有差异性，自北向南部隔水性变差。研究结果可对矿区防治水规划、设计及配套工程提供依据。

Simulation Study on Evolution Law of Mine Flow Field Base on Large Dewatering Test

According to Groundwater flow theory, this paper find out the water abundance and conditions of groundwater recharge, runoff and discharge of Taiyuan Formation limestone aquifer in deep coal mine by interferential well pumping tests. Then the hydrodynamic relation between the Taiyuan limestone aquifer and the underlying Ordovician limestone aquifer has been studied. On this basis, the author use FEFLOW software to simulate this well pumping tests, which is contrasted with the analytical solutions, to overcome the structural complexity of mining analytical method limitations. Comprehensive results show that the aquifer of Taiyuan Formation limestone has better runoff conditions, the intensive karst development, water-rich heterogeneity, and the hydrodynamic relation between underlying Ordovician limestone aquifer is extremely weak. The water-blocking of Mengkou fault in this study area is differences from north to south becoming weaker. Results of this paper provide a theoretical basis to waterproof and water control planning and supporting projects of mining area.