裂隙和断层充水煤田矿井涌水量预测的新方法

A NEW APPROACH FOR PREDICTING MINE WATER-INFLOW FROM INUNDATION COALFIELD WITH FRACTURE AND FAULTS

本文提出了模拟裂隙与断层含水层中地下水流动的一种新的数值方法。引进了两个因子来修正裂隙(或断层)处的导水系数,它们能够表现离散裂隙(或断层)的水力影响。这一方法特别适合反问题的求解,当修改裂隙(或断层)的位置时,不需要修改剖分网格。本方法已被用于山东肥城南高余矿的涌水量预测,所求得的水文地质参数与野外实测十分接近,所建立的数学模型指导了堵水工程的设计。

A new numerical method to simulate ground water flow in fractured or faulted aquifer is presented. Two factors are introduced to modify transmissivity coefficient of a fracture or a fault, which represents the hydraulic effect of discrete fractures or faults. The method is very suitable for back analysis. When location of a fracture or fault is changed, it is not necessary to modify the grid. The method has been used to predict water inflow of Nangaoyu Mine, Feicheng, Shandong province. The obtained hydro-geological parameters are close to the measured data from the field.The established mathematic model gives guidance to design of water-sealing project.