某金矿无底柱分段崩落法无岩覆盖层形成及低贫化放矿方案数值分析  

Numerical Analysis of Rock-free Overburden Formation and Low Dilution Ore Drawing Scheme by Pillarless Sublevel Caving Method in a Gold Mine

作　　者：罗才严 汪朝[2] LUO Caiyan;WANG Chao(Shaanxi Fengxian Sifang Gold Mine Co.,Ltd.;School of Resources Engineering,Xi'an University of Architecture and Technology)

机构地区：[1]陕西凤县四方金矿有限公司 [2]西安建筑科技大学资源工程学院

出　　处：《现代矿业》2021年第10期69-73,共5页Modern Mining

摘　　要：为解决陕西某金矿无底柱分段崩落法覆盖层形成及高贫化难题,基于无岩覆盖层开采理论和低贫化放矿理论,提出了“矿石+岩石”组合覆盖层形成技术方案和3分层综合控贫损放矿技术方案,并利用数值模拟的方法进行验证和优化分析。结果表明:“矿石+岩石”组合覆盖层形成技术方案可行;当1~3分段放矿截止品位分别为1.79,1.79,1.00 g/t时,崩落法放矿低贫化综合控制效果最佳。分析成果对国内外同类型矿山企业极具参考和借鉴意义。In order to solve the problem of overburden formation and high dilution of pillarless sublev⁃el caving method in a gold mine in Shaanxi,based on the theory of rockless overburden mining and low di⁃lution ore drawing,the technical scheme of'ore+rock'composite overburden formation and the technical scheme of three-layer comprehensive control of dilution and loss ore drawing are proposed,and the numeri⁃cal simulation method is used for verification and optimization analysis.The results show that the technical scheme of'ore+rock'composite overburden formation is feasible.When the cut-off grade of 1~3 sublevel caving is 1.79,1.79,1.00 g/t,respectively,the comprehensive control effect of caving method on low dilu⁃tion is the best.The analysis results are of great reference significance for similar mining enterprises at home and abroad.

关 键 词：无底柱分段崩落法 无岩覆盖层开采 低贫化放矿 数值模拟 

分 类 号：TD853.36[矿业工程—金属矿开采]