不同粒级煤矸石风化物总有机碳含量比较

摘要

This article ,conducts multi -spot sampling of the weathered coal wastes at the surface layer in Fushun West Opencast coal mine dump ,and divides the weathering samples into 3 particle size fraction of >2mm ,2mm~0 . 05mm and <0 .05mm .And then it determines the contents of organic carbon in mother rocks and their different particle fractions of the weathering samples .The results show that the organic carbon of the weathered coal wastes contents are between 53 .1 g · kg-1 and 84 .7 g · kg -1 ;the mother rocks are between 4 .5 g · kg-1 and 23 .6 g · kg-1 ;the most content of the organic carbon is in <0 .05mm weathered coal wastes grade ,which is 118 .4mg · kg -1 ,and the second is in burned weathered coal wastes < 0 .05mm grade ,which is 108 .8 mg · kg -1 ;the smaller the weathered coal wastes particle size fractions become ,the more the organic carbon content will be .%对抚顺西露天矿煤矸石山表层煤矸石风化母岩进行多点取样，把风化物筛分成＞2mm、2mm ～0．05mm和＜0．25mm 3个粒级，分析测定了矸石山表层母岩及其风化物不同粒级中总有机碳含量，比较了表层矸石不同粒级风化物总有机碳的含量差异。结果表明：矸石山表层风化物总有机碳在53．1～84．7g·kg -1之间，母岩总有机碳在4．5～23．6g·kg -1之间。页岩风化物＜0．05mm粒级总有机碳含量最高，均值为118．4mg · kg -1；燃后矸石风化物在＜0．05mm 粒级中有机碳含量次之，均值为108．8 mg · kg -1。随着风化物颗粒减小，表层矸石风化物总有机碳含量有逐渐升高的趋势。