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HYDROGEOLOGIC CHARACTERIZATION AND MINING IMPACT ANALYSIS OF A LOW-YIELD, FRACTURED GRANITE DEPOSIT

机译:低产压裂花岗岩矿床的水文地质特征及采矿影响分析

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A hydrogeologic characterization and impact analysis was performed for the proposed Hitch Rack Ranch quarry located in the Little Turkey Creek watershed southwest of Colorado Springs, Colorado. Continuous multiple channel tubing, nested piezometers; stream flow measurements; and seep mapping were used to define the three-dimensional potentiometric distribution and areas of groundwater recharge and discharge. Water balance considerations, and potentiometric response to earth tides and barometric fluctuations confirmed that the granite fracture system in the proposed mining area has an extremely low bulk hydraulic conductivity and contributes minimal groundwater discharge to the base flow of Little Turkey Creek. This conclusion has significant implications with respect to projected mining impacts and recharge to downgradient Denver Basin sedimentary deposits.
机译:对位于科罗拉多州科罗拉多斯普林斯西南的小火鸡河流域中的拟议中的希区架牧场采石场进行了水文地质表征和影响分析。连续多通道油管,嵌套式压力计;流量测量;渗流映射法和渗流映射法用于定义地下水补给和排放的三维电位分布和面积。考虑到水平衡,以及对潮汐和大气压波动的电位响应,证实了拟建矿区的花岗岩裂缝系统具有极低的整体水力传导率,并且对Little Turkey Creek的基流贡献最小的地下水。该结论对预计的采矿影响和降低丹佛盆地沉积矿床的补给量具有重要意义。

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