六盘水煤田陈家沟煤矿煤中硫的分布特征及成因探讨  

Discussion on distribution characteristics and causes of sulfur in coal of Chenjiagou Coal Mine in Liupanshui Coalfield

作　　者：张孟江 徐大杰[2] 窦延宝[2] 张博 Zhang Mengjiang;Xu Dajie;Dou Yanbao;Zhang Bo(China University of Mining and Technology,Xuzhou 221116,China;Institute of Geological Exploration,Bureau of Coal Geology,Guiyang 550008,China;Guizhou Provincial Key Laboratory of Coal Fluidized Mining,Guiyang 550014,China)

机构地区：[1]中国矿业大学,江苏徐州221116 [2]贵州省煤田地质局地质勘察研究院,贵州贵阳550008 [3]贵州省煤炭流态化开采重点实验室,贵州贵阳550014

出　　处：《煤炭与化工》2024年第9期59-64,68,共7页Coal and Chemical Industry

基　　金：贵州省科技重大成果转化项目(黔科合成果[2022]重点001号)。

摘　　要：六盘水煤田主要含煤地层为二叠世阳新统龙潭组,为一套海陆交互相多旋廻沉积地层,该地层在六盘水煤田沉积厚度大,分布范围广,含煤层数较多。煤岩成分和煤岩类型,尤其是显微煤岩类型和显微煤岩成分的含量与分布最能反映成煤的环境,各种煤岩成分信息蕴含了泥炭沼泽形成时的诸多环境信息。通过对陈家沟煤矿大量的勘探工作,对矿区内各煤层共采取800余份样品进行化验测试分析结果揭示,矿区内煤层硫分变化较大,原煤干燥基全硫为0.12%~9.75%,平均1.85%,区内煤中硫分呈上下高,中间低,且底部高于上部的特点,煤中硫的形成及变化受海进海退的变化影响,过渡相中形成的煤硫分质量分数偏高的特点,而浮煤中的硫化铁硫和硫酸盐硫有较大程度的降低,说明煤中的无机硫易洗选,对后期的煤的洗选利用起到指导作用。The main coal-bearing strata in Liupanshui coalfield is the Permian Yangxin Longtan Formation,which is a set of marine-continental alternating multi-rotation sedimentary strata.This stratum has a large sedimentary thickness,a wide distribution range and a large number of coal seams in Liupanshui coalfield.Coal rock composition and coal rock type,especially the content and distribution of micro coal rock type and micro coal rock composition,can best reflect the coal-forming environment.Various coal rock composition information contains many environmental information when peat swamp is formed.Through a large number of exploration work in Chenjiagou Coal Mine,more than 800 samples were taken from each coal seam in the mining area for testing and analysis.The results showed that the sulfur content of coal seam in the mining area changed greatly.The total sulfur content of dry base of raw coal was 0.12%-9.75%,with an average of 1.85%.The sulfur content of coal in the area was high in the upper and lower parts,low in the middle,and higher in the bottom than in the upper part.The formation and change of sulfur in coal were affected by the change of sea intrusion and regression.The mass fraction of sulfur in coal formed in the transitional phase was high,while the iron sulfide sulfur and sulfate sulfur in floating coal were greatly reduced,indicating that the inorganic sulfur in coal was easy to be washed.It plays a guiding role in the later washing and utilization of coal.

关 键 词：二叠世龙潭组 煤中硫 垂向分布 成煤环境 

分 类 号：P618[天文地球—矿床学]