木里煤田聚乎更矿区含煤地层对比与划分

Comparison and Division of Coal-Bearing Strata of Juhugeng Mining Area in Muli Coalfield

通过对木里煤田区域构造演化特征、含煤盆地发展模式、含煤地层沉积体系的分析,初步总结了木里煤田聚乎更矿区的煤层沉积规律。本区主要含煤地层为中侏罗统江仓组下段(J2j1)和中侏罗统木里组上段(J2m2),其中,中侏罗统木里组上段(J2m2)最发育,是聚乎更矿区的主要含煤地层。从晚三叠世到早白垩世,整个煤田经历了印支期、燕山期多期性的构造运动,对含煤盆地的形成和发展起着控制作用。含煤地层形成过程中总的沉积环境或地貌景观为山间盆地型的开放式泄水湖泊环境类型。通过对木里煤田聚乎更矿区各井田含煤地层的分析研究,提出了木里煤田聚乎更矿区各含煤地层划分及各矿区煤层对比关系的统一方案,从而基本解决了木里煤田以往在含煤地层划分与对比中所存在的对比不清、划分不明的现象,为该区煤层对比打下了良好的基础。

From Muli Coalfield tectonic evolution, the development mode ot coal Pasta ana me anmys~ Ol Coal-bearing Depositional System, deposition law of the Muli Coalfield are summarised. The main coal- bearing strata belong to Jurassic Series Jiangcang and Muli Formation , in which the middle Jurassic Series Muli Formationthe is almost the mining area of the main coal bearing strata. From the late three Triassic to the early Cretaceous, the coalfield experienced Indosinian, Yanshan during the period of tectonic move- ment, the coal-bearing basin formation and development play a controlling role. The coal-bearing strata in the formation of the sedimentary environment or geomorphologic landscape is formed as open sluice lake environment of the intermontane basin. Based on analysis and research of coal-bearing strata of Juhugeng mining area in Mull coal field, we put forward the unified plan of the coal-bearing strata division and the mining coal seam comparison of Juhugeng mining area in Muli coalfield. Therefore, it typically solved the unclear phenomenon in division and comparison of Muli coal-bearing strata. It has laid a good foundamental for correlation of the coal seams.