新安煤田深部煤中硫分布特征及成煤环境分析

Analysis of sulfur distribution characteristics and coal-forming environment indeep coal in Xin′an Coalfield

新安煤田位于河南省西部,处于太行构造区、嵩箕构造区和崤熊构造区交界部位,煤田主体位于太行构造区内。为了解新安煤田深部煤中硫分布特征及成煤环境,对研究区二_(1)、二_(2)煤层硫分含量的进行了分析和归纳,阐述了二_(1)、二_(2)煤层硫含量特征以及硫分平面分布特征。根据煤中各形态硫所占比例以及成因,探讨了煤层中硫分布特征及成煤环境。结果表明,二_(1)煤层贫煤以中—中高硫煤为主,无烟煤原煤以低—中高硫煤为主;二_(2)煤层贫煤以低—中硫煤为主,无烟煤以低—中高硫煤为主。二_(1)、二_(2)煤层煤中硫以硫化铁硫为主,占全硫的60%~90%。山西组成煤环境为浅水河流和海水潮汐共同控制的三角洲沉积体系,煤层的形成受淡水和海水的双重影响。

Xin′an Coalfield is located in the west of Henan Province,at the junction of Taihang tectonic zone,Songji tectonic zone and Xiaoxiong tectonic zone,the main body of the coalfield is located in the Taihang Tectonic Zone.In order to understand the sulfur distribution characteristics and coal-forming environment of deep coal in Xin′an coalfield,through the analysis and induction of sulfur content ofⅡ_(1) coal andⅡ_(2) coal in the study area,the sulfur content characteristics and sulfur plane distribution characteristics of coal seams ofⅡ_(1) andⅡ_(2) were expounded.According to the proportion and cause of sulfur in various forms of coal,the distribution characteristics of sulfur in coal and the coal-forming environment were discussed.The results showed that the lean coal in theⅡ_(1) coal seam was mainly medium-medium and high sulfur coal,and the anthracite coal raw coal was mainly low-medium and high sulfur coal.Ⅱ_(2) coal seam lean coal is mainly low-medium sulfur coal,anthracite coal is mainly low-medium and high sulfur coal.The sulfur in the coal seams ofⅡ_(1) andⅡ_(2) is mainly iron sulfide sulfur,accounting for 60%~90%of total sulfur.The coal-forming environment of Shanxi Formation is a delta sedimentary system jointly controlled by shallow rivers and seawater tides.The formation of coal seam is influenced by both fresh water and sea water.