缓倾斜中厚矿体崩落开采矿石流动规律仿真与放矿参数优化  

Simulation of ore flow behavior and optimization of discharge parameters for caving method in gently inclined medium thickness ore-body

作　　者：胡建华[1] 郭福钟 罗先伟[1] 周科平[1] 纪大波 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2015年第5期1772-1777,共6页Journal of Central South University:Science and Technology

基　　金："十二五"国家科技支撑计划项目(2012BAB14B01);中南大学研究生自主创新基金资助项目(2014zzts263)~~

摘　　要：采用正交数值仿真和盈利因子评价函数,建立了分段高度(H)、进路间距(L)、崩矿边孔角(α)、截止贫化率(g)四因素三水平的正交仿真模型,获得矿岩放矿流动行为规律。研究结果表明:4个因素对放矿最优效果的影响权重从大到小依次为进路间距L,截止贫化率g,崩矿边孔角α,分段高度H。得到(H-L-α-g)的最优组合,即H=12m,L=8 m,α=30°,g=0.5,在此条件下,可以使放出矿石经济效益达到最大,盈利因子F=17.38。对于缓倾斜中厚矿体,适当降低采场结构参数,采用低贫化放矿管理方式,有利于提高矿石回收率,降低贫化率。Taking the sublevel height（H）, approach spacing（L）, caving side hole angle（α）, and cut-off grade（g） as dependent factors, the orthogonal experiment, which contains four factors and three levels, was designed with the help of PFC2 D numerical simulation and earnings factor function. The results show that the effect weights ranking of each factor is approach spacing（L）, cut-off grade（g）, caving side hole angle（α） and sublevel height（H）. Optimal combination is H=12 m, L=8 m, α=30°, g=0.5, which leads to maximum economic benefit, and the benefit factor F=17.38. For gently inclined medium thickness ore-body, appropriate reduction of structural parameters and improved ore management are good for increasing ore recovery and reducing its dilution.

关 键 词：正交实验 PFC2D数值模拟 低贫损放矿 参数优化 

分 类 号：TD862[矿业工程—金属矿开采]