MODFLOW在山东文登抽水蓄能电站探洞涌水评价中的应用

Application of MODFLOW to Water-inrush Evaluation for the Testing Tunnel of Pumped Storage Power Station in Shandong Province

山东文登抽水蓄能电站在探洞开挖至400m处,遇到断层带,并发生涌水问题,造成部分洞段出现塌方。涌水问题必定影响水资源均衡,考虑到探洞前方有两家矿泉水水厂,探洞因此停止施工。本文应用MODFLOW软件对该工程进行模拟研究,结合研究区的工程特性,通过建模、概化与计算,模拟了探洞开挖引起的涌水和地下水均衡问题,得出的模拟计算结果较为合理,为解决工程问题提供了强有力的依据,保证了探洞施工的顺利进行。说明MODFLOW在使用恰当的情况下,可以很好地模拟裂隙介质中地下水水流问题。

When the testing tunnel for Wendeng Pumped Storage Power Station in Shandong province is excavated to 400m, a fault zone crosses the tunnel and water inrush occurred, which induced the collapse. The water inrush must influence the balance of water resource. Considering the two mineral water plants in front of the testing tunnel, the excavation working is halted. Based on the engineering features the numerical simulation with MODFLOW is carried out to evaluate the water resource change induced by the water inrush through the precise modeling and calculating. The results from the simulation are reasonable which supply the strong support for the following excavation work. It is indicated that MODFLOW could be used to simulate the groundwater flow in fissured medium when it is used properly.