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针对那林金矿开采技术条件,分别采用分段崩落法、分层崩落法开采倾斜中厚矿体和倾斜薄矿体,综合运用光面爆破与喷锚网支护巷道维护技术、中深孔逐孔爆破技术和损失贫化控制技术,取得了矿块平均生产能力达214.11 t/d;矿石综合贫化率21.87%;回收率71.98%;综合成本246.04元/t的较好技术经济指标,为同类矿床的开采提供了成功范例。
In view of the technical conditions of Nalin gold mining, the subsided caving method and subsided caving method were adopted to mine inclined medium thick ore body and inclined thin ore body, respectively. The comprehensive application of smooth blasting and shotcrete bolting net support roadway maintenance technology, Hole-by-hole blasting technology and loss-depletion control technology. The average production capacity of the ore blocks reached 214.11 t / d; the ore comprehensive depletion rate was 21.87%; the recovery rate was 71.98%; and the comprehensive technical cost was 246.04 yuan / t. It provides a successful example of the mining of similar deposits.