摘要
内蒙古是我国非常重要的后备煤炭资源基地,煤层大多聚集在白垩纪断陷盆地中,其中,五间房含煤盆地煤炭资源丰富。通过对该盆地东南部3个钻孔57件煤样的煤岩学和煤化学分析,探讨了煤层的煤质特征、煤相类型及其演化规律。研究结果表明:本区煤层以低—中高灰、高挥发分产率和低—特低硫为特征;具有较高的镜/惰比和结构保存指数;煤相类型主要为潮湿森林沼泽相,自下而上,成煤泥炭沼泽覆水程度总体有所加深,上部泥炭沼泽具有水体逐渐加深的水进型特征,下部泥炭沼泽具有水体逐渐变浅的水退型特征。
Inner Mongolia is a very important coal-resources reserve base in China,where most of the coal seams are accumulated in the Cretaceous faulted basins.The Wujianfang coal basin is rich in coal resources,and the total explored reserves of coal is 10.77 billion tons according to the general and detailed survey of coal resources.Based on the coal petrological and chemical analysis of fifty-seven coal samples from three wells in the southeast of the coal basin,the coal quality characteristics,coal facies types and their evolution characteristics of coal seams are discussed.The results show that the studied coal seams are of low-middle high ash,high volatile matter yields,low-very low sulfur content,and high vitrinite-inertinite ratio（V/I） and tissue preservation index（TPI）.The wet forest swamp is the dominant type of coal facies and the overlying water of the peat-forming swamp generally deepens towards the upper coal seam.The upper coal seams are of transgressive characteristic with increasing of water table,while the lower coal seams are of regressive characteristic with decreasing of water table.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2011年第3期1-6,13,共7页
Coal Geology & Exploration
关键词
显微组分
煤质
煤相
五间房含煤盆地
maceral
coal quality
coal facies
Wujianfang coal basin
