煤矿开采后对煤系上覆含水层疏干范围的影响研究

Study on the Influence of Coal Mining on the Drainage Range of Overlying Aquifer of Coal Measures

本文研究了李雅庄煤矿石炭系太原组14、15号煤层开采后对煤系上覆K2、K3、K4灰岩含水层的疏干范围。通过冒落带、导水裂隙带高度计算,判断煤层开采后对上覆K2、K3、K4灰岩含水层造成破坏,采用非稳定流的Theis公式计算了不同时间、不同地点的水位降深,得出4年的影响半径为1900m,9.3年的影响半径为2300m。

In this paper,the influence of the overlying aquifer unwatering range of 14,15 coal seam of the carboniferous Taiyuan group,Liyazhuang Coal Mine,are studied,by height calculation of vertical zone,water conduction fracture zone,judgment of K2,K3,K4 limestone aquifer,of overlying after coal seam mining damage,was calculated.Then we use the Theis formula of unsteady flow at different times,different locations of the water level drawdown,and it is concluded that the radius of influence of four years is 1,900m,the radius of influence of 9.3 years 2300m.