为探明陇东地区富油煤地质特征及主控因素,结合地质背景、煤工业分析、显微煤岩分析及格金低温干馏试验等相关测试,对陇东地区富油煤地质特征进行研究,采用统计分析方法,研究煤相参数与焦油产率之间的线性关系,分析影响陇东地区富油煤焦油产率的主要控制因素。结果表明:陇东地区固定碳含量和灰分产率明显较小,水分含量和挥发分产率明显较大,挥发分产率越高,焦油产率越高;煤岩组分以镜质组为主,惰质组次之,整体属于富油煤;陇东地区煤中焦油产率受成煤物质以及成煤环境的影响,煤中焦油产率与镜质组含量呈正相关趋势,与惰质组含量呈负相关趋势,与煤中H元素含量和H/C原子比呈正相关趋势;灰成分指数和镜惰比与焦油产率呈正相关趋势,表明陇东地区成煤环境属于潮湿、厌氧的还原环境,有利于煤中有机质生油。研究结果为今后煤炭资源勘探提供科学依据,有助于富油煤资源量的准确预测。

In order to find out the geological characteristics and main controlling factors of tar-rich coal in Longdong area, the geological characteristics of tar-rich coal are examined by referring to the geolog- ical background, coal industry analysis, microscopic coal petrography analysis, the Gray-King low tem- perature dry distillation test and others related tests. Statistical analysis is made to study the linear relationship between coal phase parameters and tar yield, and to explore the main control factors affecting tar-rich coal tar yield in Longdong area. The results show that the fixed carbon content and ash yield appear obviously smaller, and the moisture content and volatile yield obviously larger. The higher the volatile yield is, the higher the tar yield is. The coal rock composition is mainly composed of vitrinite, followed by inertinite, which entirely belongs to tar-rich coal. The tar yield of coal in Longdong area is affected by coal-forming substances and environment of coal formation. The tar yield is positively corre- lated with vitrinite content, which has a negative correlation with inertinite content. It is positively cor- related with the content of Hydrogen and the ratio of H/ C atom in coal. The ash component index and the mirror inertness ratio are positively correlated with the tar yield, indicating that the coal-forming en- vironment in Longdong area is wet and anaerobic, which is conducive to the generation of oil from or- ganic matter in coal. The findings lay the foundation for the coal resource exploration and contribute to accurate prediction of tar-rich coal resources in the future.