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 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
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。
The seam averages more than 50 meters wide - one of the world's thickest - and 250 meters deep, though portions of it go down at least 600 meters.
平均煤层宽度大于50米——世界上最厚之一——并且有250米深，尽管其中部分可能至少在600米之下。
Others aspire downwards deep in the St. Regis canoe Area, floating in a seam of light, a silent wake trailing behind their canoe.
另外一种“立志向下”是在圣·里吉斯独木舟区域，漂浮在一叶扁舟上，留下默默尾流。
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