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。
In view of safety the elementary and industrial analyses of coal samples were conducted , a systematic experiment was performed to investigate the minimum ignition temperature ( mit ) of zhangcun and changcun meager - lean coal in a g - g furnace , and the effect of dust concentration , spray - air pressure and dust particle size on the mit was analyzed 摘要从工业安全角度出发,对实验煤样进行了元素分析和工业分析,在高德伯儿格格瑞瓦尔德炉中对潞安常村、漳村贫瘦煤的最低着火温度进行了比较全面、系统的实验研究,探讨了煤粉质量浓度、喷吹压力以及粒度对最低着火点的影响。