【摘要】 基于大南湖矿区钻井岩心、测井、煤岩煤质等资料，运用煤地质学、沉积学、岩相古地理学及层序地层学等理论与方法，分析了大南湖矿区中侏罗统西山窑组沉积体系及成煤环境。研究表明，在大南湖矿区中侏罗统西山窑组识别出3种沉积体系，6种沉积相，划分出3个三级层序，即Sq1、Sq2和Sq3。重点研究了Sq1和Sq2。Sq1高水位体系域主要发育辫状河沉积体系和三角洲体系；Sq2低水位体系域发育不完整的三角洲沉积，主要为粗粒沉积；Sq2湖侵体系域和高水位体系域发育较好的曲流河-三角洲沉积体系。大南湖矿区成煤气候条件温暖潮湿，主要成煤环境为曲流河-三角洲沉积体系。更多还原

【Abstract】 Based on the data of drilling core, logging, coal rock and coal quality in Dananhu mining area, the sedimentary system and coal-forming environment of Xishanyao Formation of Middle Jurassic in Dananhu mining area were analyzed by using the theories and methods of coal geology, sedimentology, lithofacies paleogeography and sequence stratigraphy. The study shows that three sedimentary systems and six sedimentary facies are identified in the Xishanyao Formation of the Middle Jurassic in the Dananhu mining area, and three third-order sequences are divided, which are Sq1, Sq2 and Sq3. We mainly studied Sq1 and Sq2. The high water level system tract of Sq1 mainly develops braided river sedimentary system and delta system; The Sq2 low water level system tract develops incomplete delta deposits, mainly coarse-grained deposits; The meandering river-delta sedimentary system with good development of Sq2 lake transgressive system tract and high water level system tract. Coal-forming climatic conditions in the Dananhu mining area are warm and humid, and the main coal-forming environment is the meandering river-delta sedimentary system.更多还原