| 宁武煤田北部构造特征及其控煤作用 |
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| 引用本文： | 范二平,杨智文,高宇平,程岳宏,赵军.宁武煤田北部构造特征及其控煤作用[J].煤田地质与勘探,2018,46(4):8. |
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| 作者姓名： | 范二平 杨智文 高宇平 程岳宏 赵军 |
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| 作者单位： | 中国地质科学院地质力学研究所;大同煤矿集团有限责任公司;中海油研究总院 |
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| 基金项目： | 中国地质调查局工作项目（DD20189614）；中国地质调查局基本科研业务费专项项目（JYYWF20183201） |
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| 摘 要： | 为查明宁武煤田北部构造特征及其对石炭-二叠系的控煤作用，结合野外露头、钻孔岩性、三维地震等资料，分析了宁武煤田构造区带划分、地层结构、构造演化及应力场特征，明确了宁武煤田北部主力煤层的控煤构造。研究表明:晚古生代以来，宁武煤田主要经历了印支、燕山和喜马拉雅3期构造运动，其中燕山期构造最为复杂，具有幕式、挤压伸展交替演化，控制了煤田现今的构造格局；煤田边界主要受NE—近NS向逆冲断裂带控制，内部由平鲁向斜、朔县向斜和宁武向斜3个赋煤区构成。煤田内发育NE—NEE、近NS向和近EW向正断层，且具有叠加改造和差异性分布的特征，平面多呈斜交、平行分布，垂向多为垒堑、顺向和反向断阶构造样式，共同控制了不同井田的煤层赋存稳定区。
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| 关 键 词： | 控煤作用 构造特征 构造演化 石炭-二叠系 宁武煤田 |
| 收稿时间： | 2018-01-12 |
Tectonic characteristics and their control on coal in the north of Ningwu coalfield |
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| Abstract: | In order to investigate the tectonic characteristics and their role in controlling Carboniferous-Permian coal, the tectonic zone division, stratigraphic structure, tectonic evolution and stress field characteristics of Ningwu coalfield were analyzed based on the field outcrop, borehole lithology, 3d seismic data to clarify the coal-controlling structures of the main coal seam in the northern part of Ningwu coalfield. The study shows that since the Late Paleozoic, Ningwu coalfield has experienced three phases of tectonic movements of Indosinian, Yanshanian and Himalayan, in which the structure of Yanshan period is the most complex, with episodic and compressive extension, controlling the current tectonic pattern of the coalfield. The boundary of coalfield is mainly controlled by NE and near NS trending thrust fault zones, the interior is made up of three coal enrichment areas, such as Pinglu syncline, Suoxian syncline, and Ningwu syncline. The normal faults of NE-NEE trending, near NS and EW trending are developed in the coalfield, with the characteristics of superposition modification and differential distribution. These faults are cross and parallelly distributed in the plane, and vertically they are mostly presented as horst-graben structure or forward and reverse fault bench, which control the coal seam stability in different mine fields. |
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