... full longwall 全面长壁开采法 longwall working 长壁采矿法 longwall undercutter 长壁工作面用截煤机 ...
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longwall working face 长壁工作面
longwall pillar working [矿业] 长壁煤柱回采工艺
The paper introduces type choose and working resistance determining of powered support and its application in longwall with top-coal caving face of xiagou mine.
介绍了下沟煤矿综放开采支架选型与工作阻力的确定以及支架的适应性。
During mechanical longwall top coal mining, the gas permeability in top coal ahead of working face has bigger difference compared with slice mining due to the increase of mining height.
综放开采由于采高的加大，导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异。
Overlying strata spatial structures of longwall formed by working faces that is mined and four sides are substance coal are named "o" letter type spatial structures.
我们把一面采空(四周为实体煤)形成的采场覆岩空间结构称为“O”型空间结构。
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