西山煤田南部井田奥陶系峰峰组含水层水位与区域水位差异研究

Analysis on the unconformity between of the Aquifer water level of Fengfeng Formation and Ordovician limestone karst regional groundwater level in the southern Xishan Coalfield

为了查明太原西山煤田南部井田奥陶系岩溶水位标高与奥灰区域水位差异的原因,采用水文孔抽水试验及水质化验分析方法并结合区内构造特点对井田内峰峰组含水层水文地质特征详细研究。结果表明:区内西北部的正断层可能沟通了太灰和奥灰含水层,造成部分地段峰峰组含水层接受太原组含水层的垂向补给,从而导致部分水文孔抽水实验所获得的奥陶系灰岩岩溶水水位标高与奥灰区域水位不一致。

The hydrogeologic condition of the aquifer from the Fengfeng formation within the south of the Taiyuan Xishan Coalfield are studied using the water pumping experiment and water quality analysis results with the aim to find out the reason for the discrepancy between the Ordovician limestone karst water level within the area and regional groundwater level. The results reveal that the aquifer of the Fengfeng formation might have been connected to the aquifer of the Taiyuan formation through the normal faults in the northwestern region, so that it received the vertical supply from the aquifer of Taiyuan formation in some part of the area, resulting in the inconsistency between the Ordovician limestone karst water level obtained from water pumping experiment and regional groundwater level.