| 陕北三叠纪煤田子长矿区瓦窑堡组特高焦油产率煤富集规律分析 |
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| 引用本文： | 李华兵,李宁,姚征,谢青,高骏,许婷.陕北三叠纪煤田子长矿区瓦窑堡组特高焦油产率煤富集规律分析[J].中国煤炭地质,2021(1). |
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| 作者姓名： | 李华兵 李宁 姚征 谢青 高骏 许婷 |
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| 作者单位： | 陕西省矿产地质调查中心;陕西省地质调查院 |
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| 基金项目： | 陕西省公益性地质调查专项资助项目:陕西省富油煤及伴生有益矿产资源赋存规律研究(20180304)。 |
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| 摘 要： | 特高焦油产率煤的富集受煤变质程度、成煤环境等因素的制约。子长矿区瓦窑堡组可采煤层为5号煤层和3号煤层,通过对煤岩样品进行低温干馏试验,得到瓦窑堡组焦油产率平均为13.4%,其中5号煤焦油产率为12.55%,3号煤焦油产率为13.7%,属于特高焦油产率煤层。在空间分布上,高油煤占比达到77%,富油煤占比为23%,零星发育含油煤。研究表明,煤层焦油产率高的原因有3个,一是以低—中等变质程度的气煤为主,高挥发分、高含氢、高含氧;二是显微煤岩组成中有机含量、活性组分平均含量高;三是本区成煤环境以陆相沼泽、湖泊沉积为主,还原程度高。
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| 关 键 词： | 焦油产率 高油煤 富油煤 特高焦油产率煤 子长矿区 |
Study on Wayaobu Formation Extra-high Tar Yield Coal Enrichment Pattern in Zichang Mining Area,Northern Shaanxi Triassic Coalfield |
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| Li Huabing,Li Ning,Yao Zheng,Xie Qing,Gao Jun,Xu Ting.Study on Wayaobu Formation Extra-high Tar Yield Coal Enrichment Pattern in Zichang Mining Area,Northern Shaanxi Triassic Coalfield[J].Coal Geology of China,2021(1). |
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| Authors: | Li Huabing Li Ning Yao Zheng Xie Qing Gao Jun Xu Ting |
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| Institution: | (Shaanxi Mineral Resources and Geological Survey,Xi’an,Shaanxi 710068;Shaanxi Institute of Geological Survey,Xi’an,Shaanxi 710054) |
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| Abstract: | The enrichment of extra-high tar yield coal has been restricted by factors of coal metamorphism degree,coal-forming environment etc.The Wayaobu Formation mineable coal seams in the Zichang mining area have coal Nos.5 and 3.Through low temperature carbonization experiment obtained average coal tar yield is 13.4%,in which,coal No.512.55%,coal No.313.7%,all belong to extra-high tar yield coal seam.Spatially,high tar yield coal proportion is 77%,rich tar yield coal 23%,sporadically developed oil-bearing coal.The study has shown that there are three causes of high coal tar yield:the first is coal belongs to high volatile matter,high hydrogen and high oxygen gas coal;the second is high mean contents of organic matter and active constituent in macerals;the third is coal-forming environment in the area is mainly limnic bogs and lacustrine deposits with high reductibility. |
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| Keywords: | tar yield high tar yield coal rich tar yield coal extra-high tar yield coal Zichang mining area |
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