| 广西宜山煤田中部煤质特征及其环境意义 |
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| 引用本文： | 李荣岗.广西宜山煤田中部煤质特征及其环境意义[J].中国煤田地质,2007,19(6):25-28. |
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| 作者姓名： | 李荣岗 |
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| 作者单位： | 广西煤炭地质局,广西柳州545005 |
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| 摘 要： | 煤层是成煤物质成分、特征和形成环境的统一体，煤岩组分、煤的化学组成等是煤层物质成分和形成环境的体现。通过对宜山煤田中部上二叠统合山组K7、K6、K3煤层煤质特征分析，得出本区煤层形成的沉积环境不论是成煤前期还是成煤期受海水的影响较大，海水的作用白下而上逐渐减弱。成煤期的潜水面比较低，K3煤层覆水深度比K6、K7浅，都处于动荡环境条件中，同时受到周期性干燥环境和潮湿环境相互交替作用影响。水介质条件以碱性为主，从弱还原环境或中性环境向还原环境过渡。
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| 关 键 词： | 合山组煤层 上二叠统 煤质特征 环境条件 宜山煤田 广西 |
| 文章编号： | 1004-9177（2007）06-0025-04 |
| 收稿时间： | 2007-09-10 |
| 修稿时间： | 2007年9月10日 |
Coal Quality Character and Its Environmental Significance in Middle Part of Yishan Coalfield, Guangxi |
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| Li Ronggang.Coal Quality Character and Its Environmental Significance in Middle Part of Yishan Coalfield, Guangxi[J].Coal Geology of China,2007,19(6):25-28. |
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| Authors: | Li Ronggang |
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| Abstract: | Coal seam is entia of coal-forming material components, characteristics and forming environment, coal lithotypes, chemical composition etc. are embodiment of coal seam material components and forming environment. Through analysis of Yishan coalfield middle part Upper Permian Series Heshan Formation Nos.K7, K6 and K3 coal seam characteristics, worked out coal-forming environment of the area had impact largely by sea water, no matter it was during coal-forming prophase or coal-forming period, sea water activities attenuating from lower part to upper part. Groundwater level was lower during coal-forming period, K3 coal seam water covering depth was shallower than K6 and K7 coal seams, and they were all in a queasy environment, meanwhile affected by alternating dry and humid environments. Water media were mainly alkaline, transiting from weakly reducing or neutral environments to reducing environment. |
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| Keywords: | Heshan Formation coal seam Upper Permian Series coal quality character environmental condition Yishan coalfield Guangxi |
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