四种煤岩组分中的一种。暗煤为复合组分，颜色黯黑，光泽暗淡，故名。
选择神府矿区柠条塔煤中的镜煤、亮煤和暗煤进行了制水煤浆试验。
The paper had a coal water mixture test with vitrain coal, bright coal and dull coal from Ningtiaota coal in Shenfu mining area.
含铀、锗煤主要为煤化程度低的褐煤，属于半暗-半亮、暗-亮煤及亮-暗煤。
Uranium, germanium-bearing coals are mainly lignites of low grade incoalation and belong to semidurain, semiclarain.
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