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矿石的回收率及其质量指标,在很大程度上反映了一个采矿企业的工作效能。经室内试验和工业性试验表明:这些指标的最优结果,是在自然隔离块下(矿石或岩石)放出矿石时获得的。 1972～1974年间,此种工艺的方案之
The ore recovery and its quality indicators largely reflect the performance of a mining company. Laboratory tests and industrial tests show that the best results for these indicators are obtained when ore is released under natural barriers (ore or rock). Between 1972 and 1974, the scheme of this kind of craft