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目前,俄罗斯有35%的煤矿开采和准备开采薄煤层(0.85~1.2m)和中等厚煤层(1.2~2.5m)。开采这种煤层时,广泛采用2个成对平巷的柱式开采法:一个运输平巷和一个通风平巷。在
Currently, Russia has 35% of the coal mines mining and preparation for thin coal seam (0.85 ~ 1.2m) and medium thick coal seam (1.2 ~ 2.5m). In the exploitation of this coal seam, two pavements of pavements are widely used: a transport lane and a ventilated lane. in