... seam leader 指示层 seam outcrop 煤层露头 seam roof 煤层的顶板 ...
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coal seam outcrop 煤层露头
outcrop of coal seam 煤层露头
It is one of the major natural disasters that human is facing, so it is important to study the law of the spontaneous combustion of seam outcrop.
因此,研究煤层露头自然发火规律具有重要意义。
·2,447,543篇论文数据，部分数据来源于NoteExpress
According to different external conditions, 16 fire blocks are divided into 3 types: mine vacant space fire, small coal-pit fire and seam outcrop fire.
根据外因条件不同将乌达矿区16个火区划分出大矿采空区起火、小煤窑起火和煤层露头起火3种类型；
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The Main Chromitite Seam and the Merensky Reef do not outcrop well.
主铬铁岩矿层及麦仑斯基矿层出露不好。
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