thick coal seam [矿业] 厚煤层 ; 特厚煤层
shallow thick coal seam 浅埋深特厚煤层
hard thick coal seam 硬厚煤层
very thick coal seam 特厚煤层
special-thick coal seam 综采放顶煤
thick coal seam panel 厚煤层采区
The average coal seam here is three feet thick.
这里的煤层平均为3英尺厚。
This paper introduces condition, coal seam form change, distribute law of rock nature and rock phase, thick coal seam collect conditim in Hegang coal filed.
介绍了鹤岗煤田的地质情况，煤层空间形态变化，岩性、岩相的分布规律和厚煤层聚积条件。
How to select road section shape, bolting parameter and roadway construction method in large section cut in thick coal seam according to production reality and bolting theory are introduced.
根据生产实践及锚杆支护理论，论述了在厚煤层大断面切眼中，如何进行巷道断面形状、锚杆支护参数的选择及其巷道的施工方法。
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