... 回采率 coefficient of recovery 回采高度 stoping height 回降放射性微粒 fallout radioactive materials ...
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Then, based on the principle of not losing money in mining, the optimal cutting rock height and stoping distance for extracting lying side triangular ore pillar are optimized.
基于不亏本原则，确定回采下盘三角矿体的最合理切岩高度和后退距离。
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