| 大同煤田寒武-奥陶系岩溶水系统东北区特征分析 |
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| 引用本文： | 陈亚洲,任虎俊,李曦滨,李健,王锋利.大同煤田寒武-奥陶系岩溶水系统东北区特征分析[J].中国岩溶,2019,38(6):876-882. |
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| 作者姓名： | 陈亚洲 任虎俊 李曦滨 李健 王锋利 |
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| 作者单位： | 1.中国矿业大学 资源与地球科学学院，江苏 徐州 221008 |
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| 摘 要： | 大同煤田东北区寒武-奥陶系岩溶水以承压状态赋存于煤层底板之下，是当地重要供水水源，为确保煤田安全开采同时保护地下水资源，需对大同煤田东北区岩溶水系统特征进行分析。文章利用钻探、测井手段及水化学、水位监测数据、矿井开采资料及实地调查对研究区内岩溶水系统特征进行分析，认为研究区寒武-奥陶系岩溶顶板标高变化特征与煤向斜发育特征一致，岩溶含水层厚度发育极不均匀；研究区大部分地区为弱径流区，水化学类型以HCO3·Cl-Na型为主；地下水水源补给为西部上覆含水层越流补给和东部露头区入渗补给；研究区水位逐年下降，且呈逐年增大下降趋势，这是由于区内人工排泄点增多、人工抽采量大导致；研究区岩溶水峰值水位滞后雨季一到两个月。依据本结论对研究区煤田安全开采及岩溶水合理取用有指导意义。
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| 关 键 词： | 岩层特征 水化学 地下水流场 水位动态 |
Characteristics of the Cambrian-Ordovician karst water system in the northeastern Datong coalfield |
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| CHEN Yazhou,REN Hujun,LI Xibin,LI Jian and WANG Fengli.Characteristics of the Cambrian-Ordovician karst water system in the northeastern Datong coalfield[J].Carsologica Sinica,2019,38(6):876-882. |
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| Authors: | CHEN Yazhou REN Hujun LI Xibin LI Jian and WANG Fengli |
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| Institution: | 1.School of Resources and Geosciences,China University of Mining and Technology,Xuzhou,Jiangsu 221008,China2.Hydrogeology Bureau of China National Administration of Coal Geology,Handan,Hebei 056006,China3.Jiangsu Geology and Mineral Design and Research Institute,Xuzhou,Jiangsu 221006,China |
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| Abstract: | Cambrian-Ordovician karst water in northeast Datong coalfield exists beneath the coal seam floor with confined pressure, which is an important local water source. In order to ensure the safe exploitation of the coalfield and protect groundwater resources, the characteristics of the karst water system in the northeastern Datong coalfield should be analyzed. This work attends to make such an analysis in terms of drilling, logging, hydrochemistry, water level monitoring data, mining data and field investigation. It is concluded that the characteristics of elevation variation of the Cambrian-Ordovician karst top surface are consistent with that of coal syncline and the thickness of karst aquifer,which is very heterogeneous. Most of the research area is of weak runoff, with hydrochemical type dominated by HCO3·Cl-Na. The source for the supply of karst groundwater is from the overflowing supply of the overlying aquifer in west and infiltration supply in east. The water level in the research area is decreasing yearly with a tendency of increase, because of increasing artificial drainage sites and large artificial withdraw volume. The peak level of karst water in the research area is one to two months behind the rainy season. These conclusions have guiding significance for the safe mining of the coalfield and the rational utilization of karst water in the research area. |
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