青海省唐古拉山赋煤带煤层特征研究

Research on Characteristics of Coal Seam in Tanggula Coal Belt in Qinghai Province

对唐古拉山赋煤带的煤田分布特征、成煤环境及控煤构造进行研究,认为乌丽煤田主要含煤地层为上二叠统乌丽群那益雄组(P3n)和拉布查日组(P3l),扎曲煤田含煤地层为下石炭统俄群尕组(C1e),通过分析区域石炭纪及二叠纪古地理特征,表明煤田成煤环境为潮坪中的泥炭沼泽相环境,繁盛的植被、区域构造运动的减弱和湖盆水体的缓慢退却都是聚煤的主要因素。两煤田控煤构造均为褶皱断裂型,煤层发育在复向斜两翼的次级背斜中,NW向的逆断层控制着褶皱及煤层的展布形态,NW-SW向断裂多对煤层起破坏作用。

Studies the coal distribution,coal forming environment and coal control structure. Thinks Nayixiong formation and Labuchari formation are the main coal bearing stratum in Wuli coalfield, and Equnga formation is the main coal bearing stratum in Zhaqu coalfield. Through the analysis of Carboniferous and Permian regional paleogeographic characteristics, show that the coal forming environment is peat swamp tidal fiat environment, and the main factor of coal accumulation are lush vegetation, regional tectonic movement and the weakening of the lake water slow retreat. The coal controlling structure of the two coalfields is fold and fracture type, coal seam in the secondary anticline synclinoria wings, NW inverse distribution of folds and faults control the coal seam and NW-SW fractures destructive the coal seam.