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垂直漏斗后退式开采1975年首次在加拿大列瓦克镍矿成功地用于矿柱，目前在美国和中国等矿山不仅用于矿柱回采，也用于矿房回采。在矿体中钻出垂直或倾斜的平行炮孔,并用集中药包相继起爆，在矿体中形成倒向漏斗，从矿房中运出漏斗中的破碎岩石
expl. vertical crater retreat; VCR
垂直漏斗后退式开采
earth.sc. vertical crater retreat

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