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提交了泗顶矿某矿体4～加5勘探线室内模型试验的定性参数.试验结果表明:要保证矿块安全生产,所留设的8个自然矿柱直径不应小于5m.
The qualitative parameters of an indoor model test for a 4 to 5 exploration line of an orebody in Yanding Mine were submitted. The test results showed that the 8 natural pillars should be no less than 5m in diameter to ensure safe production of the ore.