coal classification meaning in English
煤的分类
Examples
- Study on difference between the international coal classification standard and chinese coal classification standard
煤炭分类国际标准与中国标准异同之比较 - The results show that there is distinct relation between reflectance of vitrinite and coal classification , though this correspondence is relatively complex , especially in low - medium metamorphic bituminous stage where coals with same sometimes can be divided into different classes
研究表明：镜质组反射率与煤种之间的关系较复杂，特别是在中低变质烟煤阶段，相同变质程度煤往往归属于不同煤种，受煤岩组成和还原程度的影响较大。 - Under general geological study of exploratory development of coalbed gas and underground gasification of coal bed in eastern depression of liaohe basin , authors apply the basic principle of coal geology and the data of vitrinite reflectance and technical analysis of coal to ascertain that coal classification are dominantely the lignite , long - flame coal and gas coal of coal - bearing upper section of third member of shahejie formation , and then dissertate the variational regularity between coal rank and buried depth in vertical and otherness of vertical limit of coal rank in different coal - rich regions
摘要运用煤田地质学基本理论和煤的镜质组反射率值及工业分析等有关数据，确定了辽河盆地东部凹陷古近系沙三段含煤亚段的煤种主要为褐煤、长焰煤和气煤；进而阐述了该煤段垂向上煤级与埋深的变化规律性、不同赋煤区各煤级垂向界限的差异性。