宁东煤田红墩子矿区煤中硫分布特征及成因分析  

Distribution Characteristics and Genesis Analysis of Sulfur in Hongdunzi Coal Mine in Ningdong Coalfield

作　　者：张志峰 黄鹏程 祁风华 王贝 梁永平 陆爱国 王丽欣 ZHANG Zhifeng;HUANG Pengcheng;QI Fenghua;WANG Bei;LIANG Yongping;LU Aiguo;WANG Lixin(Geological Bureau of Ningxia Hui Autonomous Region,Yinchuan,Ningxia 750001)

机构地区：[1]宁夏回族自治区煤炭地质局,宁夏银川750001

出　　处：《中国煤炭地质》2023年第9期21-26,共6页Coal Geology of China

基　　金：宁夏自然科学基金项目(2021AAC03463)。

摘　　要：宁夏油气资源贫乏,宁东能源化工基地高速发展,煤炭资源需求逐年增大。红墩子矿区是宁东能源化工基地的重要原煤产地,但矿区高硫煤资源量占矿区煤炭总资源量的13.56%,很大程度上限制了煤炭资源的开发与利用,因此开发利用高硫煤是解决宁东地区能源安全及保障能源供应的重要途径。在利用煤炭勘查及相关研究成果资料的基础上,完成了红墩子矿区煤岩层对比,分析了矿区各成煤时代的沉积环境及古地理特征,揭示了煤中硫空间非均质性的分异机制及赋存特征。结果表明:从平面分布来看,山西组4煤为低硫煤,原煤全硫(S_(t,d))为0.07%~2.05%,平均0.74%,呈北高南低的分布态势;太原组8煤为中高硫煤,原煤全硫(S_(t,d))平均2.58%,高硫煤零星分布,矿区中部和西部地区中高硫煤分布较广;太原组9煤原煤全硫(S_(t,d))平均2.49%,矿区东部硫分整体较高,高硫煤分布于东部及南部。矿区内煤中硫分的富集整体呈由东向西的迁移规律。从形成时代来看,山西组到太原组的煤中硫含量显著增加,体现了煤中硫分的富集受海相沉积和陆相沉积的差异影响。Ningxia is poor in oil and gas resources,Ningdong energy-chemical industry base develops rapidly,and the demand of coal resources increases year by year.Hongdunzi mining area is an important source of raw coal in Ningdong energy-chemical industry base,but the high sulfur coal resources in the mining area account for 13.56% of the total coal resources in the mining area,which greatly restricts the development and utilization of coal resources.Therefore,the development and utilization of high sulfur coal is an important way to guarantee the energy supply in Ningdong area.This study made full use of coal-rock correlation and related research results,analyzed the sedimentary environment and paleogeographic characteristics of different coal seams,and revealed the differentiation mechanism and occurrence characteristics of spatial heterogeneity of sulfur in coal.The results show that the No.4 coal in Shanxi Formation is low sulfur,and the total sulfur(S_(t,d))of raw coal is 0.07%~2.05%,with an average of 0.74%,which is high in the north and low in the south area.The No.8 coal seam in Taiyuan Formation is medium-high-sulfur,and the average total sulfur(S_(t,d))of raw coal is 2.58%.The high-sulfur coal is scattered and widely distributed in the central and western areas of the mining area.The total sulfur(S_(t,d))of the No.9 coal seam in Taiyuan Formation is 2.49% on average.The sulfur content in the eastern part of the mine is relatively high,and the high-sulfur coal is distributed in the eastern and southern parts.The accumulation of sulfur content in coal in the mining area shows a migration pattern from east to west.From the formation age,the sulfur content of coal increases significantly from Shanxi Formation to Taiyuan Formation,which shows that the sulfur content in coal is affected by the difference of marine deposition and continental deposition.

关 键 词：硫分 煤层对比 古地理 沉积环境 形态硫 

分 类 号：P618.11[天文地球—矿床学]