顾北煤矿中央采区水文地质条件综合分析与评价

Comprehensive Analysis and Evaluation of Hydrogeological Conditions in the Central Mining Area of Gubei Coal Mine

以顾北煤矿中央采区为例,在系统分析矿井水文地质条件的基础上,采用井下灰岩含水层放水试验方法,通过对水量和各含水层观测孔水位动态分析,确定了南、北、中三个采区之间的水力联系,结果表明:三个采区属于相对独立的水文地质单元,中央采区各含水层之间在垂向上水力联系弱,采区C3Ⅰ组灰岩含水层富水性为弱,其中采区边界Fs833为不导水断层,露头区范围灰岩裂隙发育,具有一定的导水性,地下水从露头区沿灰岩倾斜方向向深部流动,其富水性逐渐减弱,研究结果为矿井灰岩水害防治提供重要的参考意义。

Taking the central mining area of Gubei coal mine as a case study, and based on a systematic anal-ysis of the mine’s hydrogeological conditions, researchers employed an underground limestone aquifer drainage test method. By examining the water volume and dynamic changes in water levels in observation holes across each aquifer, they determined the hydraulic connections between the southern, northern, and central mining areas. Results indicated that these three mining areas constitute relatively independent hydrogeological units. The hydraulic connections between aq-uifers in the central mining area are weak in the vertical direction. The C3Ⅰ group limestone aquifer in this area exhibits weak water-richness. The Fs833 boundary of the mining area is a non-conductive fault. Limestone fractures in the outcrop area are well-developed and exhibit some degree of conductivity. Groundwater flows from the outcrop area along the inclined direction of limestone towards deeper depths, with its water-richness gradually decreasing. These research findings provide valuable insights for preventing and controlling limestone water damage in mines.