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基于金沙县禹漠勘查区地质背景及区内勘查钻孔的煤质化验资料，对区内各煤层的煤质特征进行了系统整理分析，并分析了区内煤中硫分、灰分含量变化，通过对煤层灰分和硫分的成煤环境控制分析，确定其成煤沉积环境。结果表明：金沙县禹漠勘查区龙潭组各煤层均为无烟煤，变质程度高，其中4、7、9号煤层灰分、硫分含量普遍低于13、15号煤层；研究区各煤层硫分含量主要以硫化铁硫的形态存在，占比达76.91%，表明这些煤层中黄铁矿硫含量是导致煤层硫分含量较高的主要因素；通过对煤灰成分元素氧化物含量在纵向上变化规律反演的沉积环境与硫分、灰分分析的成煤环境一致，综合分析认为研究区13、15号煤层为泻湖相的泥炭沼泽成煤环境，总体受海水影响程度较大，古气候环境为潮湿，4、7、9号煤层为潮坪相的泥炭沼泽成煤环境，总体受海水影响程度较低，古气候环境为潮湿-半潮湿。 相似文献
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《中国煤炭地质》2019,(6)
羊头崖详查区位于华北聚煤盆地中北部,含优质的石炭二叠纪煤层。该区含煤层数多,上部煤层变化较大。从煤层宏观组合结构入手,到煤组、层组、煤层,利用标志层、间距、煤质特征等进行了详细对比。各种方法相互配合、交叉使用、互有验证,达到了最佳的对比效果。通过煤层厚度、煤中灰分硫分以及煤层顶底板沉积特征分析了聚煤环境及煤层、煤质变化的影响因素。可采煤层是在废弃碎屑环境之上的动态泥炭沼泽发育而成的。动态泥炭沼泽限制了基底和同生的碎屑环境,长期稳定发育形成可采煤层-动态聚煤模式。同生碎屑沉积导致煤层分叉变薄、煤中灰分、硫分增高;成煤期后,局部河流下切冲刷对泥炭层的破坏显著;海水过早淹没泥炭沼泽会导致煤层变薄,及附近灰分硫分增高,成煤期后海侵下渗导致煤中硫分增高。 相似文献
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陕西渭北石炭-二叠纪煤田澄合矿区4号煤层是区内主要可采煤层之一。通过对区内煤层厚度与其上覆煤系厚度、煤中灰分、硫分及煤层顶板岩性-岩相等因素的相关性分析,结合4号煤层成煤期与聚煤期后环境分析,探讨了研究区及其周缘地区4号煤层厚度变化原因。结果显示:4号煤层厚度与上覆煤系厚度、煤中灰分及硫分均呈正相关关系,相关系数分别为0.810 1、0.430 9、0.813 6;该煤层发育于浅水型三角洲沉积体系的三角洲平原地带;煤层厚度变化受控于聚煤期同沉积构造和聚煤期后河流冲蚀作用的双重影响,前者使煤层厚度变化较小,后者对煤层厚度影响较大,甚至出现无煤带。 相似文献
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基于贵州水城小牛井田晚二叠世煤样的全硫分、微量元素、常量元素等测试数据,探讨了煤中元素富集特征及其与陆源碎屑的关系,重点是全硫分、微量元素对古海平面变化的反演。结果表明,小牛井田煤中常量元素Si、Ca、Mg、Ti、K含量高于中国煤均值,Al、Fe、Na含量低于中国煤均值;与地壳克拉克值相比,煤中微量元素只有B和Mo相对富集;煤中微量元素的富集在一定程度上受控于陆源碎屑,常量元素对陆源碎屑也有一定的继承性。煤中全硫分及微量元素B、Co、Cr、Cu、Ga、Ge、Mo、Ni、Pb、Sr、V、Zn的纵向变化规律可以用来反演古海平面变化,海退时形成的煤层全硫分及微量元素含量较低,海侵时形成的煤层全硫分及微量元素含量较高。 相似文献
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塔里木盆地东南缘下—中侏罗统煤层沿阿尔金山前断续分布,其煤岩、煤质与典型的西北侏罗纪煤层具有明显不同。通过对和田布雅、于田普鲁、且末红柳沟等煤矿主采煤层样品进行煤岩、煤质鉴定及煤化指标等一系列综合研究分析,结果表明,主采煤层以光亮煤、半亮煤为主,其次是半暗煤、暗淡煤;煤岩组分以镜质组为主,壳质组含量少,具中-高镜惰比。因成煤沼泽的还原程度促进了无机硫分的形成,煤中全硫含量随镜质组含量的增加呈现逐渐增高的趋势,且煤层硫分与灰分整体具有明显的负相关关系。此外,煤层挥发分受不同种类硫分的影响,亦有明显差异性变化。在民丰凹陷中-高硫煤中,硫分以无机硫为主,随着硫分的升高挥发分亦有升高趋势;瓦石峡凹陷中-低硫煤受有机硫控制,对挥发分产率的影响不明显。民丰凹陷煤层的灰分指数高于瓦石峡凹陷,可见后者的成煤沼泽环境潜水面要比前者高得多。针对上述诸多因素分析,进一步揭示塔东南地区煤岩、煤质多样性变化受断陷湖盆以及局部水体较深的还原型沼泽环境控制,最终形成了中-高挥发分、中-低灰分、中-低硫分的煤质及富镜贫惰的煤岩特征。 相似文献
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依据井田地质勘查资料及煤质测试结果,对马依西二井田内可采煤层中硫的特征及与沉积环境的关系进行了探讨。结果表明,区内各煤层煤中硫含量变化较大,自下而上以底部30、29煤为高硫煤,煤中硫分最高可达7.2%,下部19至26为中高硫-高硫煤,17-1煤层为低硫煤,上部3至12-1煤层为中高硫煤;在平面上总体呈东南高、北西低的分布态势。聚煤环境是造成煤中硫差异的主要因素,17-1煤发育于泛滥平原相中,以成煤植物所含的原生硫为主,煤中硫含量低,而其它煤层形成环境因受海水影响较大,存在更多以硫化铁硫为主的次生硫而使硫含量较高。 相似文献
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Sulfur Isotopic Characteristics of Coal in China and Sulfur Isotopic Fractionation during Coal—burning Process 总被引：5，自引：1，他引：5
The determined results of the sulfur contents and isotopic composition of coal samples from major coal mines in 15 provinces and regions of China show that the coal mined in the north of China is characterized by higher ^34S and lower sulfur content, but that in the south of China has lower ^34S and higher sulfur content.During the coal-burning process in both indrstrial and daily use of coal as fuel the released sulfur dioxide is always enriched in lighter sulfur isotope relative to the corresponding coal;the particles are always enriched in heavier sulfur isotope.The discussion on the environmental geochemical significance of the above-mentioned results also has been made. 相似文献
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Distribution Characteristics of Sulfur and the Main Harmful Trace Elements in China's Coal 总被引：1，自引：1，他引：0
To promote the rational development and use of clean coal resources in China,data on the regional and age distribution of sulfur,arsenic and other harmful elements in Chinese coal was broadly collected,tested for content,and analyzed.Coal in northwestern China is characterized by low to extremely low levels of sulfur;the coal of the Taiyuan Formation in northern China mainly has high-sulfur content;that of the Shanxi Formation is mainly characterized by low sulfur coal;and the Late Permian coal in southern China has overall higher sulfur content;other regions have low sulfur coal.The average content of harmful trace elements in the bulk of China's coal is similar to the corresponding content in the coal of the North America and the rest of the world,whereas the content of various elements(Hg,Sb and Se)is different in magnitude to the corresponding percentage in the crust.The average content of the elements Cr,Se,Co,Be,U,Br in Late Permian coal in S China ranks first in the country whereas the average content of Hg and Cl in the coals of Late Carboniferous to Early Permian age in N China are the highest.The average content of Mn in Early and Middle Jurassic coal is higher in NW China.The high content of harmful elements in some coal should cause particular concern both in the development and utilization of coal. 相似文献
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运用电感耦合等离子质谱（ICP-MS）、X射线荧光光谱（XRF）、离子选择电极（ISE）、显微镜光度计和煤化学等方法,对山东济宁矿区的高硫煤（太原组16号煤层）与低硫煤（山西组3上煤层）剖面的煤岩、煤质和煤地球化学特征进行研究。高硫煤中微量元素在垂向上呈现显著的变化规律：（1）Sr含量从煤层底板到顶板呈增高趋势,而Ba含量则相反;因而Sr/Ba比值从下向上呈逐渐变大趋势（0.04～47.7）;（2）Th/U比值从下向上也呈逐渐变大趋势（0.2～37.1）;（3）As含量在煤层顶板石灰岩（26.1μg/g）、透镜状黄铁矿夹层（14.7～19.3μg/g）中较高;（4）V、Cr、Co、Ni、Cu、Pb、Zn等元素在煤层底部和顶部分层中含量较高,而在煤层中部分层中含量较低;（5）Nb、Ta、Zr、Hf、Ga等元素从煤层的底部到顶部呈逐渐降低趋势;（6）煤中稀土元素总量（REE）,除透镜状黄铁矿夹层（第2、4、11分层）外,其它分层（第1、3、5、6、7、8、9、10分层）显示从上往下逐渐增高之规律性。低硫煤中微量元素的分布和垂向变化与高硫煤明显不同：As含量在14个煤分层中都较低（1.03～3.37μg/g）,Sr/Ba比值从下向上变化不大（0.4～2.2）,各个煤分层中稀土元素总量（REE）呈现随灰份含量增高而增高的变化趋势,低硫煤与高硫煤的稀土元素分布模式差别很大。上述研究结果表明济宁矿区高硫煤与低硫煤在地球化学特征上的差别,反映了上石炭统太原组与下二叠统山西组沉积环境和聚煤条件的差别,具有指相意义;太原组16号煤层中富集的硫及有害微量元素,对环境具有潜在危害。 相似文献
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Sulfur is one of the havardous elements in coal The concentrations of sulfur are relatively high in coal.The major forms of sulfur in coal are pyritic,organic and sulfate.Pyritic and organic sulfur generally account for the bulk of sulfur in coal.Elemental sulfur also occurs in coal,but only in trace to minor amounts.When coals are burned,leached and washed,sulfur will be released in the form of sulfide and H2S,which then reach with O2,water and other substances to change into vitriol,and in some places it may form acid rain.And they will impact water environment,acidify the soil and do great harm to plants and human health.In this paper,on the basis of the data from the Yanzhou mining district,the distribution and concentrations of sulfur are analyzed and the existing forms of sulfur are studied.The variation of sulfur and its impact on the environments also are described when coal is used. 相似文献
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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。 相似文献
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To promote the rational development and use of clean coal resources in China, data on the regional and age distribution of sulfur, arsenic and other harmful elements in Chinese coal was broadly collected, tested for content, and analyzed. Coal in northwestern China is characterized by low to extremely low levels of sulfur; the coal of the Taiyuan Formation in northern China mainly has high-sulfur content; that of the Shanxi Formation is mainly characterized by low sulfur coal; and the Late Permian coal in southern China has overall higher sulfur content; other regions have low sulfur coal. The average content of harmful trace elements in the bulk of China＇s coal is similar to the corresponding content in the coal of the North America and the rest of the world, whereas the content of various elements （Hg, Sb and Se） is different in magnitude to the corresponding percentage in the crust. The average content of the elements Cr, Se, Co, Be, U, Br in Late Permian coal in S China ranks first in the country whereas the average content of Hg and CI in the coals of Late Carboniferous to Early Permian age in N China are the highest. The average content of Mn in Early and Middle Jurassic coal is higher in NW China. The high content of harmful elements in some coal should cause particular concern both in the development and utilization of coal. 相似文献
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贵州大方背斜南东翼煤中硫特征及成因分析 总被引：1，自引：0，他引：1
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。 相似文献
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Anne M. Graese David N. Baynard James C. Hower John C. Ferm Yuejin Liu 《International Journal of Coal Geology》1992,21(4)
The stratigraphic and regional variation of petrographic and chemical properties within the coals of the Upper Carboniferous Tradewater Formation and surrounding rocks in the Western Kentucky coal field were analyzed with the intent of constructing a depositional model for the occurrence of these low sulfur coals. Cores were megascopically described, and coal samples were analyzed for maceral, ash, and sulfur contents. These data were then analyzed to determine regional variation within the study area, as well as vertical variation within single coal columns.Sedimentological data from core logs indicate that the majority of the Tradewater rocks consist of irregularly distributed, coarsening-upward, fine-grained detrital material that was deposited in shallow bodies of water. Fossiliferous shales and limestones indicate a marine influence. Less common coarse-grained, fining-upward sequences appear to represent deposits of meandering or braided channels.Like the detrital rocks, the coal seams are irregularly distributed and exhibit substantial variation in petrographic and chemical properties which reflect changes in the Eh and pH of the coal swamp waters. These individual swamps were relatively limited in extent and probably occupied a low-lying coastal area. The relatively high vitrinite content of most of the coals suggests a reasonable degree of preservation of decaying plant materials. The study of benched samples from surface mines suggests a distinct dichotomy between swamps that were in more or less continuous contact with sulfate-rich marine or brackish water and those in which peat accumulated in a dominantly fresh-water setting. Most of the latter show a pattern of upward increasing sulfur content and decreasing vitrinite content, indicating increasing influences of oxygenated water that would encourage microbial action and which would degrade the peat and increase the tendency for sulfide precipitation. The high sulfur coals do not display this variability. The high rates of lateral variability encountered in the data suggest that future study should concentrate on smaller areas where variation can be completely documented. 相似文献
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通过对王洼煤矿扩大延伸勘探区可采煤层煤的煤岩特征、物理化学性质和工艺性能的分析研究,阐述了该区可采煤层煤的煤质特征及其变化规律：该区各可采煤层煤的显微有机组分中镜质组含量大于惰质组,二者约占89％,壳质组占1％左右,煤的无机组分占10％左右,并以粘土矿物为主。水分含量在8％左右,该区自西向东煤的灰分产率、挥发分产率、硫分、水分逐渐降低,属特低灰-低灰、低-中硫、特低磷-低磷,中高-高挥发分,高热值、不具粘结性的长焰煤、不粘煤。 相似文献