摘要
为了探讨煤质特征参数对成煤环境的指示意义,针对井田内主采煤层中的上述参数变化规律进行分析,对胡家河井田地质勘探资料中灰分、全硫分及煤灰成分等数据进行统计整理,并采集煤层煤样对宏观煤岩类型进行划分。结果表明:胡家河井田侏罗系延安组煤具有低中灰分、低中硫分等特征;煤岩组分、灰分产率、全硫分、灰成分指数可判别成煤环境,煤的丝质组+半丝质组体积分数高,壳质体有原始氧化特征,煤相类型为干燥的高位沼泽或浅覆水的潮湿森林沼泽;灰分平面分布具有"东北高、西南低"的特点,成煤环境受河流作用影响较大,北东方向陆源碎屑补给较多,而全硫分的分布趋势大致相同,并以硫铁化物为主,有机硫百分含量较少;灰成分指数及三角端元图解显示沼泽环境为近陆源区覆水程度较浅的弱还原-较强还原型,成煤期沼泽环境随着河流汇入使水位变深,形成了代表较强还原型的镜质组。
To analyze the characteristic of coal quality and its significance for coal forming environment,the correlation between the parameters mentioned above of main mineable coal seam was discussed in detail.Statistical arrangement of the ash content,sulfur content(sulfur species)and ash composition etc.in geological prospecting report of Hujiahe coalmine was carried out,the coal samples were collected to classify the macroscopic coal and rock types..The results show that early Jurassic Yanan Formation coal in Hujiahe coalmine is characterized by low medium ash content,low medium total sulfur.Coal petrography types,ash yield distribution,sulfur distribution,ash component index can explain coal forming environment.High inertinite and half inertinite content,exinite with original oxidation characteristic indicate that coal facies are dry high peat swampland or moist forest peat swampland with shallow water covered.Ash content is characterized by“northeast high hut southwest low”,fluvial process plays a main role for coal forming environment,terrigenous detrital is supplied from northeast,which shows a different character with total sulfur,iron sulphides tend to a big proportion,inversely organic sulfur tends to a small proportion.Analysis of ash component index and ternary plot of ash compositions indicates that swamp environment is weak stronger reduction terrestrial sources with shallow water covered,swamp water level is deeper with the river water into peat swamp during coal forming period,because which forms vitrinite indicating a strong reduction environment.
作者
李焕同
李搛倬
李阳
刘震
LI Huantong;LI Jianzhuo;LI Yang;LIU Zhen(School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China)
出处
《中国科技论文》
北大核心
2017年第21期2431-2437,共7页
China Sciencepaper
基金
中国博士后科学基金资助项目(2016M592907XB)
国家自然科学基金资助项目(41502160)
西安科技大学培育基金资助项目(2014012)
关键词
彬长矿区
胡家河井田
侏罗系延安组
煤质特征
成煤环境
Binchang mining area
Hujiahe coalmine
Lower Jurassic Yan’an Formation
coal quality characteristic
coal forming environment
作者简介
李焕同(1986-),男,讲师,主要研究方向为煤田地质与煤田构造,htlcumt@126.com
