隐伏岩溶地下水动态特征及水文地质模式分析
Analysis of groundwater dynamic characteristics and hydrogeological model of karst under concealed conditions
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摘要: 以淮南煤田潘二煤矿2次放水试验及“5.25”陷落柱突水等资料为基础,采用地下水系统分析、构造控水理论及统计分析等方法,对区内主要含水层间的水力联系和断层的导(阻)水性进行了系统分析。结果表明:奥陶系灰岩含水层与太原组C3III段灰岩含水层之间存在密切水力联系,2个含水层水位响应和变化幅度近乎一致,而与太原组C3I和C3II段灰岩含水层间水力联系弱;F1断层在太原组C3I和C3II段灰岩含水层中为阻水断层,而在太原组C3III段和奥陶系灰岩含水层为导水断层,DF1断层在太原组C3I段含水层为阻水断层,而在太原组C3II、C3III段和奥陶系灰岩含水层中为导水断层。Abstract: Based on the data of the two water releasing tests and “5.25” water inrush of collapse columns of Pan’er Coal Mine in Huainan Coalfield, the hydraulic connection between the main aquifers and transmissivity-impermeability of faults were systematically analyzed by means of groundwater system analysis, structural water control theory and statistical analysis. The results show that: there a close hydraulic connection between Ordovician limestone aquifers with C3III group limestone aquifers of Taiyuan Formation with the same water level response and variation range. Besides, the hydraulic connection between Ordovician limestone aquifer with C3I and C3II group limestone aquifer of Taiyuan Formation is weak. F1 fault is impermeability in C3I and C3II group limestone aquifer of Taiyuan Formation but transmissivity in C3III group limestone aquifers of Taiyuan Formation and Ordovician limestone aquifers. In addition, DF1 fault is impermeability in C3I group limestone aquifer of Taiyuan Formation but transmissivity in C3II, C3III group limestone aquifers of Taiyuan Formation and Ordovician limestone aquifers.
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