峰峰矿区大淑村矿水文地质条件探析

Probe into Hydrogeological Condition in Dashucun Coalmine, Fengfeng Mining Area

大淑村井田周边赋存的断层均为倾向井田外侧的正断层,致使井田部位相对抬升,切断了含水层的补给来源,地下水补给、排泄不良,井田处于相对封闭的水文地质单元之中。井田内开采上组煤的主要充水含水层为大煤顶板砂岩含水层,次为野青灰岩和伏青灰岩含水层;煤层回采冒落后,下石盒子组底部砂岩含水层将成为间接充水含水层。这些含水层的富水性弱,单位涌水量均小于0.05L/(s.m),因此,大淑村井田开釆上煤组的矿井水文地质类型为中等,矿井受水害的影响不大,矿井防治水的工作简便易行。

Faults around the Dashucun minefield are all dip direction normal faults outside the minefield and made the minefield relatively uplifted, thus have cut aquifer sources of replenishment. Groundwater recharging and discharging conditions are bad, make the minefield in a relatively confined hydrogeological unit. The main water filling aquifer in the minefield during the mining of upper coal group is the Damei （means main coal seam） roof sandstone aquifer, second is Yeqing limestone and Fuqing limestone aquifers, after the caving of coal seam extraction, the Xiashihezi Formation basal sandstone aquifer will be indirect water filling aquifer. All of aquifers have weak water yield properties, specific capacities are all less than 0.051/s .m. Thus mine hydrogeological type of the Dashucun minefield during the mining of upper coal group is medium, mine water disaster hazard is not quite, and mine water control is easy.