云南小发路C5 煤层无烟煤特性与煤相分析

Characteristics and coal facies of high quality anthracite from coal seam No.5 of Xiaofalu coal mine,Yunnan province

摘要: 综合运用煤岩学、煤化学等理论与方法,系统研究了云南省彝良县小发路优质无烟煤 C5 煤层的煤岩、煤质特性,结合煤相参数分析其地质成因。结果表明:小发路优质无烟煤 C5 煤层灰分产率极低(最低1.49% ,小于5.00% 的占76.5% );相对其他典型无烟煤(太西煤、晋城无烟煤等),C5 煤层煤氢含量高(多为3.22% ~3.37% )、自由氢极高(2.95% ~3.12% )且氧含量极低 (1.44% ~2.27% );C5 煤层煤以光亮型煤为主(79.8% ),镜质组中结构镜质亚组与碎屑镜质亚组相近,惰质组中以结构亚组为主。 C5 煤层剖面性质变化不大,煤相参数TPI大多大于1.00,GI 为4.22~5.78,煤相为低位森林沼泽相。

Abstract: :ThecharacteristicsandgeologicaloriginofhighqualityanthracitefromcoalseamNo.5ofXiaofalu,Yunnanprovince,Chinawerestudiedbasedonthetheoriesandmethodsofcoalpetrology,coal chemistryetc.TheresultsshowedthatcoalseamNo.5wascharacterizedbyextremelylowashyieldof rawcoal(Ad:thelowestvalue1.49%).ComparedwithothertypicalanthracitesinChina,coalseam No.5hadhigherhydrogencontent(Hdaf:thehighestwere3.22% ~3.37%)andthehighestfreehydrogencontent(2.95% ~3.12%),aswellasthelowestoxygencontent(1.44% ~2.27%).Bright coalswerethemainlithotype(79.8%).Subgroupswithcellstructurewerethemainmaceralcompositioninbothvitriniteandinertinite.TheTPIandGIvaluesofcoalseamNo.5were0.97~1.44and 4.22~5.78(>4.00),respectively.