deep coal-seam 深部煤层
deep coal seam 深部煤层
deep inclined seam 大倾角煤层
deep dip angle seam 大倾角煤层
deep-buried coal seam 深埋煤层
deep incline coal seam 急倾斜煤层
deep inclined thick seam 急倾斜特厚煤层
deep unmineable coal seam 深部不开采煤层
deep inclined thin coal seam 大倾角薄煤层
deep inclined thick coal seam 急倾斜厚煤层
·2,447,543篇论文数据，部分数据来源于NoteExpress
During the initial excavation, the tender coal seam workings in deep seam in Nantun Colliery takes on slocking of roof, with breaking-out in bulk coal and surrounding rock failure.
南屯煤矿深部松软煤层巷道，在掘进过程中顶板破碎，伴有大量顶煤冒落且围岩破坏严重。
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