阳关寨整装勘查区含煤地层沉积环境及聚煤特征研究

Features of coal bearing strata sedimentary environment and coal accumulation in Yangguanzhai integrated exploration area

根据含煤地层的单井岩性、沉积构造以及煤岩煤质特点,对贵州省威宁县阳关寨背斜整装勘查区宣威组进行了沉积特征、沉积序列、沉积环境和聚煤规律分析,结果表明：研究区宣威组以16号煤层为界,可分为曲流河河道和河岸沉积以及曲流河洪泛盆地沉积两种聚煤环境,聚煤作用主要发生在16号煤层底界—煤系顶界的曲流河洪泛盆地沉积环境,形成的煤层厚度较稳定~稳定,分布范围较广,为区内具有工业价值的主要煤层。

According to the single shaft lithology,sedimentary tectonics,petrology and coal quality,the paper analyzes the sedimentary features,sedimentary sequences and sedimentary environment and coal accumulation law of the coal bearing strata,in Yangguanzhai integrated exploration area of Weining County.The results show that,divided by the No.16 coal seam,the coal-accumulation environment is classified as meandering river and the bench sedimentary environment,and meandering river flood basin sedimentary environment; the coal-accumulation mainly happens in the later environment,within the bottom boundary of No.16 coal seam and top boundary of the coal-series,which forms the main industry-applicable coal seams,with relatively stable or stable coal seam,and wide distribution.