开滦矿区14煤煤厚特征及沉积环境分析

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英文篇名：Coal Thickness Characteristics and Sedimentary Environment Analysis of No.14 Coal in Kailuan Mining Area 作者：吴金水 ; 刘景 ; 谢卫东 ; 李伍 英文作者：WU Jin-shui;LIU Jing;XIE Wei-dong;LI Wu;School of Resources and Geosciences,China University of Mining and Technology;MOE Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process,China University of Mining and Technology; 关键词：煤层厚度变化 ; 澙湖相 ; 沉积环境 ; 潮坪相 ; 浅海相 英文关键词：coal seam thickness change;;sedimentary environment;;lagoon facies;;tidal flat facies;;neritic facies 中文刊名：MKSJ 英文刊名：Coal Engineering 机构：中国矿业大学资源与地球科学学院;煤层气资源与成藏过程教育部重点实验室(中国矿业大学); 出版日期：2019-07-20 出版单位：煤炭工程 年：2019 期：v.51;No.499 语种：中文; 页：MKSJ201907029 页数：5 CN：07 ISSN：11-4658/TD 分类号：139-143

摘要

开滦矿区是河北省主要的煤炭生产基地,矿区内石炭-二叠系煤系地层含煤丰富。为了探究矿区内14煤赋存特征,通过对开滦矿区见14煤钻孔进行统计分析,采用沉积地层学、煤田地质学、煤岩学,深入分析开滦矿区的原始沉积环境与煤层赋存特征。研究认为14煤赋存特征主要受原始沉积环境影响,其沉积环境早期以澙湖相为主,由于水下障壁沙坝的存在,使得澙湖内水动力弱,并在沙坝向陆一侧较早沉积泥炭。由于陆地不断向海推进,研究区逐渐过渡到潮坪相最终暴露于地表,使得研究区内广泛沉积泥炭,后期又由于海侵作用过渡到浅海相,终止了泥炭的堆积。
        Kailuan Mining Area is the main coal production base in Hebei Province. The coal-bearing strata of Carboniferous Permian formation are abundant in the mining area. In order to explore the occurrence characteristics of No. 14 coal seam in Kailuan Mining Area,we analyzed the original sedimentary environment and coal seam occurrence characteristics of Kailuan Mining Area by statistical analysis of seeing No. 14 coal boreholes in Kailuan Mining Area,using sedimentary stratigraphy,coalfield geology and coal petrology. It is concluded that the occurrence characteristics of No. 14 coal are mainly influenced by the original sedimentary environment. In the early stage,the main sedimentary environment is the Lagoon facies. Because of the existence of subaqueous bar,the hydrodynamic force in the Lagoon is weak,and peat is deposited earlier on the land side of the sand bars. Due to the continuous advance of land to the sea,the study area gradually transited to tidal flat facies and exposed to the surface,which resulted in extensive sedimentary peat in the study area. Later,the peat accumulation was stopped due to the transition from transgression to shallow sea facies.

引文

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