To overcome the difficulty of unstability of orebody and surrounding rock, the test of flat-back cut-and-fill drift mining is carried out.
针对凡口铅锌矿狮岭顶板矿体和围岩极不稳固的牲，进行了机械化上向进路分层充填采矿工艺的试验研究。
To overcome the difficulty of unstability of orebody and surrounding rock, the test of flat-back cut-and-fill drift mining is carried out.
针对凡口铅锌矿狮岭顶板矿体和围岩极不稳固的牲，进行了机械化上向进路分层充填采矿工艺的试验研究。
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