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。
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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