黔北煤田花秋勘探区9、16号煤煤相特征与煤中硫

Nos.9 and 16 Coal Seams Anthracographic Features and Sulfur in Coal

根据黔北煤田花秋勘探区9、16号煤煤岩煤质鉴定资料,在参考前人研究成果的基础上,全面系统地研究了9、16号煤煤相及其发育特征。研究表明:9号煤形成于芦木芦苇沼泽相和潮湿的芦木芦苇沼泽相,芦木芦苇沼泽相分布于勘查区北部和南部东翼,潮湿的芦木芦苇沼泽相分布于南端西翼;16号煤基本形成于芦木芦苇沼泽相,少量形成于覆水森林沼泽相,覆水森林沼泽相仅分布于中部的西翼,沼泽的其它部位均为芦木芦苇沼泽相。通过分析煤相与煤中全硫、有机硫的关系,认为沉积体系所处的大环境整体控制了硫含量的高低,成煤沼泽类型控制了硫分的变化。勘查区北部、北西部及中部以东可能是9号煤潜在的低硫区,由于16号煤处于区域性的高硫层位,北东部可能是黄铁矿硫相对较高的区域。

Based on Nos.9 and 16 coal seam coal petrological identification data and research results of predecessors, all roundly and systematically studied Nos.9 and 16 coal seams＇ coal facies and development features. The study indicated that： the No.9 coal was formed in Calamites, Phragmites bog facies and humid Calamites, Phragmites bog facies, the former is distributed in northern exploration area and east limb of southern area, while the later in west limb of southern end; the No.16 coal was basically formed in Calamites, Phragmites bog facies, a small part in water covered forest bog facies, this facies is only distributed in west limb of middle part, while other part of the bog belongs to Calamites, Phragrnites bog facies. Through analysis of relations between coal facies and total sulfur, organic sulfur, considered that the macroenvironment the sedimentary system in has controlled sulfur content en masse, while coal-forming bog type controlled variation of sulfur composition. The northern, northwestern and to the east of middle part of the exploration area are potential low sulfur district of No.9 coal; since No.16 coal is situated in the regional high sulfur horizon, northeastern part possibly the high pyritic sulfur content district.