禹州中锋集团云煤二矿开采的煤层属于古生界二叠系山西组二１煤，煤体松软，呈粉末状（ｆ＝０．３～０．５），顶板为坚硬中粒或细粒砂岩，底板为松软、易风化、易膨胀的泥岩和砂质泥岩。故俗称“二软一硬”煤层。云煤二矿暗斜井由平台向下揭露煤层，随后便进入全煤巷掘进，距? The coal seam of Yunzhong No.2 Mine of Yuzhou Center Group belongs to the second coal of Shanxi Group of Permian Permian. The coal body is soft and powdery (f = 0.3-0.5). The roof is hard medium grain or fine Granular sandstone, the floor is soft, easy to weathering, expansive mudstone and sandy mudstone. It is commonly known as “two soft and one hard” coal seam. Cloud coal mine dark inclined shaft down from the platform to expose the coal seam, and then into the whole coal heading, away from?