【摘要】 淮南煤田二叠纪含煤岩系含煤层30多层,其中主要可采煤层为1,6,8,11-2和13-1五个煤层。几年来,作者对该含煤岩系进行了系统、全面的沉积学研究,特别是突出砂体形态和垂直层序进行环境分析,认为1煤形成于水下三角洲平原环境;6,8煤属于湾充填的下三角洲平原环境;11-2和13-1煤则分别为树枝状分流河道及网状分流河道废弃充填的三角洲平原沉积。同时,阐述了不同成煤环境中煤层层数、厚度变化和煤质等一系列特征,指出网状分流河道废弃充填三角洲平原沉积环境的含煤性最好。更多还原

【Abstract】 The Permian coal-bearing formation in Huainan coalfield contains more than 30 coal seams, of which, the five major workable seams are Nos. 1, 6, 8, 11-2 and 13-1. The author made a systematic and comprehensive investigation of the sedimentology in the past several years. Special attention is paid to environment by analyzing the shape of sand and vertical sequence of strata. It is considered that No.1 seam is deposited on subaqueous deltaic plain, No.6 and No. 8 seams on bayfilled lower deltaic plain Coal 11-2 on the lower deltaic plain of abandoned-fill branched distributary channel, and Coal 13-1 is the deltaic plain sediment of abandoned-fill anastomosed distributary channel. At the same time, the paper describes the characters of seams formed in different environment, such as number, thickness, and quality of seams.It is pointed out that the best environment is in the deltaic plain of abandoned-fill anastomosed distributary channel.更多还原