邱集煤矿四五灰含水层水位恢复数值模拟研究

Study on numerical simulation of water level recovery in the No.4 and No.5 limestone aquifer in Qiuji Coal Mine

针对邱集煤矿11#煤层掘进过程中四五灰顶板出水原因、四五灰含水层水文地质变化、重要边界条件和垂向补给通道的位置等问题,以矿区地下含水层为研究对象,利用四五灰含水层水位恢复资料,采用FEELOW软件建立了三维地下水水流数值模型模拟并计算四五灰含水层疏干水量。模拟结果表明井田区域浅部四五灰富水性及渗透性较好,四五灰非均质各相异性明显,矿井东南部区域的渗透性强于东北部区域的渗透性;浅部、中部、深部四五灰含水层疏干正常水量为3620m3/h、3930m3/h、4130m3/h。

Aimed at the water-bursting cause and hydrogeology variation of No. 4 and No. 5 limestone, important boundary conditions and the location of vertical recharge path in No. 11 coal seam in Qiuji Coal Mine, according to the data of water level recovery in the No. 4 and No. 5 lime- stone aquifer, the author set up a numerical model of 3D groundwater flow using FEELOW soft- ware and calculated the unwatering quantity of the No. 4 and No. 5 limestone aquifer. The results showed that the water abundance and permeability of the No. 4 and No. 5 limestone in shallow coalfield area were preferable, and the anisotropy of heterogeneity was obvious. The permeability of southeast area was better than that of northeast area, and the normal unwatering quantities of the shallow part, middle part and deep part in the No. 4 and No. 5 limestone aquifer were 3620 m^3/h, 3930 m^3/h, 4130 m^3/h.