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急倾斜铝土矿的坑内开采,过去仅有分层崩落法的实践,该采矿方法生产效率低,木材消耗高,劳动条件是,因此不宜大量使用。最近几年在林歹矿区实践的“带金属网假顶、低分段凿岩、扇形中深孔落矿、振动出矿有底柱崩落采矿法”取得了一定的成效,获得较高的评价。通过对全过程各个拜节的详细考察,笔者认为该采矿方法今后在设计和实施中,很多方面均还有待改进和完善。
Pit mining in steeply-inclined bauxite has in the past only been the practice of the sub-level caving method, which has low production efficiency, high timber consumption and labor conditions and therefore should not be used in large quantities. In recent years in practice Linlin mining area “with a metal mesh roof, low-section rock drilling, fan-shaped hole in the deep-hole, vibrating out of the bottom-pillar caving mining method” has achieved some success, get a higher rating . Through the detailed inspection of the whole process of worship, I believe that the mining method in the future in the design and implementation, in many aspects have yet to be improved and perfected.