| 三维地震及电法综合勘探在晋西北黄土区的应用 |
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| 引用本文： | 田忠斌.三维地震及电法综合勘探在晋西北黄土区的应用[J].中国煤炭地质,2008(11):64-66. |
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| 作者姓名： | 田忠斌 |
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| 作者单位： | 山西省煤炭地质物探测绘院,山西晋中030600 |
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| 摘 要： | 晋西北某矿井位于吕梁山黄土塬区，为年产500万t的特大型在建矿井，为查明首采区煤层赋存条件、地质构造情况、以及奥灰与主要含水层的富水性，对该区进行了三维地震及电法综合勘探。其中三维地震勘探查明了勘探区内4#、9#煤层的埋藏深度和起伏形态，解释断层18条，陷落柱4个，褶曲1条，煤层倾角大于15°的区段1处；运用瞬变电磁法结合直流电测深法查明K6、K5砂岩富水异常29处、4#、7#、9#煤顶板岩层富水异常51处，奥灰顶界面-100m富水异常18处。三维地震及电法的综合勘探，不仅解释了该区主要煤层的厚度变化趋势及基岩面和奥灰顶界面深度变化情况，还对落差大于5m断层、直径大于25m陷落柱、煤层、奥灰水以及主要含水层的富水情况、导通关系及相互间的水力联系进行了分析，其结论为解决矿井建设和开采中的地质难题，提供了可靠的地质信息。
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| 关 键 词： | 三维地震勘探 电法勘探 地质构造 陷落柱 含水层 富水性 |
Application of Integrated 3D Seismic and Electric Prospecting in Loessland of Northwest Shanxi |
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| Tian Zhongbin.Application of Integrated 3D Seismic and Electric Prospecting in Loessland of Northwest Shanxi[J].Coal Geology of China,2008(11):64-66. |
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| Authors: | Tian Zhongbin |
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| Institution: | Tian Zhongbin (Shanxi Provincial Coal Geological Exploration, Geophysical Prospecting, Surveying and Mapping Institute, Jinzhong, Shanxi 030600) |
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| Abstract: | To find out initial winning district coal seam hosting condition, geological structure and water yield property of Ordovician limestone and other main aquifers of a coalmine with 5 million ton annual output in the northwest Shanxi Luliang Mountains loess tableland, integrated 3D seismic and electric prospecting were carried out. The 3D seismic exploration method has identified Nos.4 and 9 coal seams＂ burial depth and undulation in the region, 18 faults, 4 subsided columns, a fold, and a section with coal seam dip angle 〉15° interpreted. The integrated transient electromagnetic and DC electric sounding method have identified 29 K6 and K5 sandstone water yield property anomalies, 51 Nos.4, 7 and 9 coals roof strata water yield property anomalies, 18 Ordovician top surface -100m water yield property anomalies. The integrated seismic and electric prospecting not only interpreted main coal seams thickness changing trend, depths of bedrock, Ordovician limestone top surface variation, but also analyzed faults with throw 〉5m, subsided column with diameter 〉25m, water yield properties, conduction and mutual hydraulic relations between coal seam, Ordovician limestone water and main aquifers. The conclusion has provided reliable geological information to settle geological issues in mine construction and mining. |
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| Keywords: | 3D seismic prospecting electric prospecting geological structure subsided column aquifer water yield property |
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