| 河南荥巩煤田构造变形对二1煤层的影响 |
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| 引用本文： | 沈建海.河南荥巩煤田构造变形对二1煤层的影响[J].中国煤炭地质,2014(4):6-10. |
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| 作者姓名： | 沈建海 |
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| 作者单位： | 河南省地质矿产勘查开发局测绘地理信息院,河南郑州450006 |
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| 摘 要： | 荥巩煤田位于豫西强变形区的嵩山背斜北翼,区内断块组合特征明显,聚煤期后构造变形对二1煤层的改造强烈。通过分析煤田构造、二1煤层及煤岩特征对煤层瓦斯赋存的影响,认为层间滑动断层是煤田中普遍发育的一种构造样式,印支期嵩山地区存在着区域性的顺二1煤层发育的层间滑动断层,层间滑动引起的煤层流变造成了"三软"构造煤的发育和煤层厚度的剧烈变化,煤厚的变化及煤体结构的破坏是煤层瓦斯赋存不均衡和突出的根本原因。
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| 关 键 词： | 荥巩煤田 二煤层 层间滑动断层 构造煤 瓦斯 |
Impacts from Structural Deformation on Coal IIl in Xinggong Coalfield,Henan Province |
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| Shen Jianhai.Impacts from Structural Deformation on Coal IIl in Xinggong Coalfield,Henan Province[J].Coal Geology of China,2014(4):6-10. |
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| Authors: | Shen Jianhai |
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| Institution: | Shen Jianhai (Institute of Surveying, Mapping and Geographic Information, Henan Bureau of Geology and Mineral Resources Exploration and Exploitation, Zhengzhou, Henan 450006) |
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| Abstract: | The Xinggong coalfield lies in the north limb of Songshan anticline, western Henan strongly deformed zone. Fault block assemblages is significant in the area, post coal accumulation stage structural defornation has strongly reformed the coal Ⅱ1 After analyzed the impacts from coalfield structure, coal Ⅱ1 and coal lithotype on coal seam gas hosting, considered that the interlayer gliding faults are widely developed in the coalfield. During the Indo-Chinese epoch, coal Ⅱ1, bedding interlayer gliding faults existed regionally and caused the rheology of coal seams and finally brought up “three soft” （soft roof, coal and floor） tectonoclastic coal and dramatically changed coal seam thicknesses. The coal thickness changes and coal structure destruction are basic reasons of coal seam gas hosting disproportion and outburst. |
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| Keywords: | Xinggong coalfield coal Ⅱ1 interlayer gliding fauh tectonoclastic coal gas |
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