| 淮南朱集西井田第二含煤段煤层对比研究 |
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| 引用本文： | 沙亚南,鲁辉.淮南朱集西井田第二含煤段煤层对比研究[J].中国煤炭地质,2008(8):20-22. |
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| 作者姓名： | 沙亚南 鲁辉 |
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| 作者单位： | 江苏煤炭地质勘探三队,江苏常州213017 |
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| 摘 要： | 淮南朱集西井田二叠系含煤地层可划分为7个含煤段，下石盒子组为第二含煤段共含煤10层，其中4-1、402、5-1、7—8煤层为可采煤层。根据井田大量地质资料，采用标志层法、古生物法结合物性特征、煤质特征对第二含煤段可采煤层进行划分对比。4煤组中4-1、4-2均为较稳定的中厚煤层，距4-1，煤层下约13m的铝质泥岩是对比本煤组的主要依据；5煤组中5-1，煤下1m左右常见0．5m薄煤层，在39线以西常合并为一层，以此为特征区别于其他煤组：7-2为较稳定煤层，其视电阻率曲线特征呈单峰形态，长源距伽马曲线顶部靠下有一小台阶，本煤组距8煤层15m左右，间距较稳定，也可作为对比标志层；8煤层顶板富含植物化石，以常见较完整的椭圆斜羽叶及栉羊齿富集为特征，8煤层视电阻率幅值为第二含煤段最高，长源距伽马曲线常呈不对称状态，顶部曲线幅值常低于底板而明显区别于其他煤层。
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| 关 键 词： | 淮南煤田 第二含煤段 煤层对比 标志层 化石带 物性特征 |
A Study on Correlation of Main Coal Seams in Second Coal-bearing Member,Zhuji West Minefield,Huainan |
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| Sha Yanan,Lu Hui.A Study on Correlation of Main Coal Seams in Second Coal-bearing Member,Zhuji West Minefield,Huainan[J].Coal Geology of China,2008(8):20-22. |
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| Authors: | Sha Yanan Lu Hui |
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| Institution: | (The Third Jiangsu Coal Geological Exploration Team, Changzhou, Jiangsu 213017) |
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| Abstract: | Permian coal-bearing strata in the Zhuji west minefield, Huainan can be divided into 7 coal-bearing members. Lower Shihezi Formation is the second coal-bearing member, containing 10 coal seams, in which Nos.4-1, 4-2, 5-1, 7-2 and 8 are mineable. To divide and correlate mineable coal seams are based on marker beds, fossils, combined with physical property and coal quality characteristics. Nos.4-1 and 4-2 coal slices in No.4 coal seam are rather stable medium thick coal slices, an aluminous mudstone about 13m under the No.4-1 coal slice is main basis to identify the coal seam; under the No.5-1 coal slice of No.5 coal seam about lm has a 0.5m thin coal slice and is usually merged together with No.5-1 slice to the west of No.39 exploration line, this specific feature is distinguished from other coal seams; No.7-2 coal slice is rather stable, its apparent resistivity curves presenting single-peaked configuration, just under the top of long-spaced gamma curve has a small step, interval between this slice and No.8 coal seam is about 15m and rather stable, can also be a correlation marker; in No.8 coal roof contains abundant plant fossils, and characterized by enrichment of rather intact Plagiozamites oblongifolius and Pecopteris sp., No.8 coal seam apparent resistivity peak value is the highest in the second coal-bearing member, long-spaced gamma curve is usually presenting asymmetric status, peak value of curve top part is usually lower than its floor＇s and obviously distinguished from other coal seams. |
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| Keywords: | coal seam correlation marker bed fossil zone physical property characteristic second coal-bearing member Huainau coalfield |
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