贵州大方背斜南东翼煤中硫特征及成因分析

根据井田勘探施工钻孔采取的136个煤样的煤质测试结果,对贵州大方背斜南东翼可采煤层煤中硫的特征及其成因进行了分析。结果表明:该区可采煤层从特低硫煤—高硫煤均有,中上部煤中硫的质量分数较高,一般为中高硫煤,中下部以低中硫煤为主,底部煤中硫的质量分数变化大,从特低硫煤可到高硫煤;龙潭组中上部煤层煤中硫主要与硫的来源和沉积环境有关,而下部煤层煤中硫与其来源有关,与沉积基底中岩性发育也有一定关系,凝灰岩、玄武岩发育地段,煤中硫的质量分数低,反之则高。 

Analysis on generation and distribution properties of sulfur of coal in south-eastern wing of Dafang anticline, Guizhou Province

Based on the study of coal property measurement results of 136 samples from coal field exploration,the sulfur content and its forming mechanism in the recoverable coal seams in south-eastern wing of Dafang anticline are analyzed. The results show that the change of sulfur content is greater in south-eastern wing of Dafang anticline,ranging from low sulfur content coal to high sulfur content coal.Generally the coal in upper and middle section is of high sulfur content,the coal from mid to lower section is of lower sulfur content,but in under section the sulfur content is varied ranging from very low to very high.It is indicated that the coal's sulfur content in upper part of Longtan Formation is related to sulfur origin and depositional environment,but the sulfur content of coal in lower part of the Formation is related to sulfur original source and to lithologic properties of deposition basement,namely in the interval occurring tuff and basaltic,sulfur content of coal is low,otherwise is high.