无底柱分段崩落法矿石覆盖层回收实验

发布时间：2019-03-17 21:46

【摘要】：攀钢兰尖铁矿从露天转入地下后采用无底柱分段崩落法进行开采,并在顶部分段预留了40 m左右的矿石覆盖层以保证下部分段回采的安全.为了探究最佳的回收方式回收预留在采场的这部分矿石覆盖层,设计了无贫化、低贫化、截止品位以及按步距崩矿量100%的比例出矿方式,并进行回收模拟实验.通过对各方案放矿后的回收率、贫化率及放矿后矿岩界面的完整度比较分析得出,采用无贫化放矿方式带来的经济效益最佳并且放矿后矿岩界面相对完整,对下面分段继续回收纯矿石创造了条件,为类似矿山矿石覆盖层回收方案的选择提供参考.
[Abstract]:The Lanjian Iron and Steel Mine of Panzhihua Iron and Steel Group Co., Ltd. is mined by sublevel caving method without bottom pillar after it is transferred from open pit to underground, and about 40 m of ore cover layer is reserved in the top section to ensure the safety of sublevel stoping. In order to explore the best way to recover this part of the ore cover which is reserved in the stope, the non-dilution, low-dilution, cut-off grade and the proportion of 100% ore caving according to the step-by-step caving are designed, and the recovery simulation experiment is carried out. Through the comparison and analysis of the recovery rate, dilution rate and integrity of ore-rock interface after drawing, it is concluded that the non-dilution drawing method brings the best economic benefit and the ore-rock interface is relatively complete after drawing, and that the ore-rock interface is relatively complete after drawing, and that the ore-rock interface after drawing is relatively complete. The further recovery of pure ores in the following sections creates conditions for the selection of ore cover recovery schemes similar to those in mines.
【作者单位】：东北大学深部金属矿山安全开采教育部重点实验室;西南科技大学环境与资源学院;攀钢兰尖铁矿;
【基金】：“十三五”国家重点研发计划项目(2016YFC0801605;2016YFC0600706) 国家自然科学基金资助项目(51674061)
【分类号】：TD853.36;TD861.1

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