By using drilling in pit, ore reserve classification is increased, risks of underground mining engineering are reduced and avoided.
主要阐述了矿区通过实施坑内钻探，提高储量级别，降低和避免井下采矿工程风险，节约了成本，增加了效益。
By using drilling in pit, ore reserve classification is increased, risks of underground mining engineering are reduced and avoided.
主要阐述了矿区通过实施坑内钻探，提高储量级别，降低和避免井下采矿工程风险，节约了成本，增加了效益。
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