基于华北太原组煤层受到奥陶系灰岩含水层高承压水威胁,为提高煤炭资源采出率,减少煤炭资源损失以及降低矿井带压开采的危险性。通过分析奥灰含水层的水文地质条件,进行了带压开采危险性评价,利用Visual MODFLOW软件建立矿井水文地质模型,设定安全疏降水压为1 MPa,计算了矿井奥灰含水层疏降水量。从疏降水量大小、矿井排水能力、水文地质条件、水资源综合利用等方面进行了疏水降压可行性分析。结果表明,当疏降水量为8 676 m3/d时,经过9 d排水,奥灰水压可稳定并降至1 MPa,达到设计的安全水位,疏水降压是可行的,矿井带压开采可以安全进行。

Based on the seams in North China Taiyuan Formation threatened by high pressurized water in the aquifer of Ordovician limestone, in order to improve t he effective recovery rate of the coal resources, to avoid the waste of the coal resources and to reduce the danger of the pressurized mining, with the analysis on the h ydrogeological conditions of the Ordovician limestone aquifer, an evaluation on the danger of the pressurized mining was conducted.Visual MODFLOW software was ap plied to establish a mine hydrogeological model.A safety water pumping and water pressure was set as 1 MPa and the water pumping quantity from the aquifer in Ordov ician limestone was calculated.A feasibility analysis on the water pumping and pressure dropping was conducted on the water pumping quantity size, mine water draina ge capacity, hydrogeological conditions, comprehensive utilization of the coal resources and others.The results showed that when the water pumping quantity was 8 67 6 m3/d, after 9 days water drainage, the water pressure of the Ordovician limestone would be stable, would be reduced to 1 MPa and would reach the designed safety water level.Thus the water pumping and the pressure dropping would be feasible and the pressurized mining could be safely conducted.