摘要
为研究彬长矿区胡家河井田4号煤层的沉积环境,总结聚煤规律,归纳聚煤模式,综合运用煤田地质学、岩石学、沉积学、构造地质学等多学科交叉研究方法,野外观察和室内分析相结合,对胡家河井田4号煤层的沉积环境及聚煤规律进行分析。结果表明:井田内含煤地层主要为内陆河流相沉积,其中河漫沼泽、牛轭湖以及泛滥平原上的泥炭沼泽是4号煤层的主要沉积环境;富煤带分布于中部及南部,并向东部和西部延伸,富煤中心分布于中部和西南部,与地层沉积中心有较好的对应关系;在靠近西部的古河道时,煤层出现分岔、变薄、尖灭的现象,古河道流经区域富县组和延安组地层全部缺失,形成无煤区。研究成果对于该矿煤炭资源的可持续发展以及提高煤炭资源开发和利用效率具有重要的理论与实践意义。
In order to study the sedimentary environment of No.4 coal seam in Hujiahe mine field in Binchang Mining area,the law of coal accumulation and the mode of coal accumulation are summarized,the interdisciplinary research methods of coal field geology,petrology,sedimentology and structural geology,combining field observation and indoor analysis are comprehensively applied to analyze the sedimentary environment and coal accumulation law of No.4 coal seam in Hujiahe mine field.The results show that the coal containing strata in the mine field are mainly inland fluvial facies deposits,among which Hemang swamp,oxbow lake and peat swamp on the flood plain are the main sedimentary environment of No.4 coal seam.The coal-rich belt is distributed in the middle and south,meanwhile extends to the east and west,and the coal-rich center is distributed in the middle and southwest,which has a good correspondence with the stratigraphic depositional center.When approaching the ancient river course in the west,the coal seam appears bifurcated,thinned and peaked,and the strata of Fuxian Formation and Yan’an Formation in the area through which the ancient river course flows are all missing,forming a coal-free area.The research findings have important theoretical and practical significance for the sustainable development of coal resources and the improvement of the exploitation and utilization efficiency of coal resources.
作者
刘震
LIU Zhen(China Coal Technology and Engineering Group Ecological Environment Technology Co.,Ltd.,Xi’an 710077,China)
出处
《科技和产业》
2024年第3期166-171,共6页
Science Technology and Industry
基金
中煤科工生态环境科技有限公司科技创新基金(0206KGST0022)。
关键词
河流相
沉积环境
聚煤规律
聚煤模式
fluvial facies
sedimentary environment
coal accumulation law
coal accumulation mode
