中文摘要：

根据采用煤岩学、煤地球化学和沉积学等原理,分析了分层煤样宏观-微观组构、煤中矿物质和煤地球化学参数等特征,探讨了大同煤田塔山井田石炭-二叠系太原组3号煤的成煤泥炭沼泽沉积特征。结果表明,3号煤层煤相可分为湖沼相、潮湿森林沼泽相、较深覆水森林沼泽相和覆水森林沼泽相4种煤相,潮湿森林沼泽相为主体煤相;原始泥炭沼泽沉积环境可分为高位咸水湖成沼泽、高位淡水河成沼泽、中位咸水滨海沼泽、中位淡水/半咸水河成沼泽和低位淡水河成沼泽。分层煤样成煤过程中陆相沉积特征明显,沉积环境在垂向上呈现三次明显旋回韵律。从微观煤层特征印证了宏观沉积理论,为研究大同煤田煤层的赋存规律提供了理论依据。

英文摘要：

Methods of coal petrology, coal geochemistry and sedimentology were used to de termine macro-micro structural constituent, mineral characteristics and geochemical parameters of No. 3 coal seam. And the coal-forming peat swamp environment character was analyzed. The re suits show that the No. 3 coal seam includes four phases, that is, limnetic phase, wet forest swamp phase, weaker water cover forest swamp phase,and overlying-water forest swamp phase, in which the wet forest swamp is main phase. The original peat swamp sedimentary environment can be divided into scanty saline water latchstring swamp, scanty fresh water fluvial swamp, moderate saline water seashore swamp, moderate fresh and semi-saline water fluvial swamp, and rich fresh water fluvial swamp. The continental sedimentation character and three cycle rhythms are obvious in the vertical section of No. 3 coal seam. The micro coal seam characteristiced con- firmed the macro sedimentary which theory, which offered theoretical basis for designing and op- timizing coal washing and use.