摘要
为分析自然安息角对露天矿采出矿石品位的影响,采用EDEM仿真模拟和无人机测绘及Surpac软件辅助分析两种方法对纳米比亚湖山露天铀矿台阶爆破后自然安息角进行测定和对比分析,并基于自然安息角构建了铲装矿岩界线的数学模型。结果表明:自然安息角仿真模拟值与无人机测绘及Surpac软件辅助分析实测值平均偏差0.775°,最大偏差率为3.8%,两种方法均可精确地测定矿岩松散体自然安息角。以纳米比亚湖山露天铀矿为算例,采用铲装矿岩界线的数学模型测算自然安息角对矿岩界限影响,经测算,全寿期满足水冶条件的矿石量增加0.65 Mt,可多回收金属铀超过190 t。
To analysis the influence of natural repose angle on the mined ore grade in open-pit mine,post-blast stockpile natural repose angle of African uranium open-pit mine,by using EDEM simulation,drone survey and Surpac software assisted analysis methods,were measured and compared.The mathematical model for predicting boundary of ore-rock was built based on the natural repose angle.The results shows that,average deviation between the simulated data and measured data of natural repose angle is 0.775°,and the maximum deviation rate is 3.8%.Both of methods can accurately measure the natural repose angle of loose ore and rock.Take the African uranium open-pit mine as an example,the mathematical model of ore-rock boundary was used to calculate the effect of natural repose angle on ore-rock boundary.It is estimated that the amount of valuable ores will increase by 650000 tons and more than 190 tons of uranium metal can be recovered.
作者
周恕辉
刘玉龙
黄磊
张怀峰
汪志平
ZHOU Shuhui;LIU Yulong;HUANG Lei;ZHANG Huaifeng;WANG Zhiping(CGNPC Uranium Resources Development Co.,Ltd.,Beijing 100029,China)
出处
《有色金属工程》
CAS
北大核心
2022年第10期131-137,共7页
Nonferrous Metals Engineering
关键词
露天铀矿
离散单元法
自然安息角
爆堆高度
矿岩界线
open-pit uranium mine
discrete element method
angle of repose
height of explosion pile
ore and rock boundary
