三塘湖煤田库木苏矿区煤岩煤质及煤相特征

Characteristics of Coal Quality and Coal Facies in Kumusu Mining Area of Santanghu Coalfield

以现代沉积学、煤岩学、煤化学和煤相学理论为指导,充分利用煤心样品的测试数据与煤岩鉴定等资料,对位于三塘湖盆地西部库木苏凹陷的研究区煤质、煤岩和煤相特征进行了分析研究。研究结果表明:煤质特征为低水、低灰-中灰、特低硫-低硫、中高-高发热量煤;显微煤岩类型分析表明煤层顶部为惰镜煤,煤层下部为微镜煤;顶部煤层沼泽类型应为低位泥炭沼泽,中下部煤层为草本沼泽。综合分析认为研究区煤层沉积环境从草本沼泽向低位泥炭沼泽过渡,主要成煤期沼泽环境稳定。

Based on modern sedimentology, coal petrology, coal chemistry and coal facies theory for guidance, make full use of the test data of coal core samples and coal rock identification and other data to analyze and study the characteristics of coal quality, coal rock and coal phase in the study area located in the Kumusu sag in the west of the Santanghu basin. The research results show that the coal quality is characterized by low water, low ash-medium ash, ultra low sulfur-low sulfur, medium high-high calorific value coal;microscopic coal rock type analysis shows that the top of the coal seam is inert mirror coal,and the bottom of the coal seam is micro mirror coal;the top coal seam marsh type should be low peat marsh, and the middle and lower coal seam is herb marsh. The comprehensive analysis indicated that the coalbed sedimentary environment in the study area transitioned from herbaceous marsh to low peat marsh,and the marsh environment was stable during the main coal formation period.