摘要
针对崩落法矿山矿石损失贫化问题,基于正交试验法,以分段高度、进路间距、崩矿步距、进路宽度为因素,矿石损失率、矿石贫化率和采准系数为指标优化采场结构,依据正交试验方案和眼前山铁矿东部矿体-213~-303 m阶段特征,以1∶100比例设计并制作采场放矿模型开展放矿物理试验。结果表明,矿石损失率影响因素序列为崩矿步距、分段高度、进路间距、进路宽度;矿石贫化率影响因素序列为分段高度、崩矿步距、进路间距、进路宽度;采准系数影响因素序列为崩矿步距、分段高度、进路宽度、进路间距,建议设计和优化采场结构时以崩矿步距和分段高度为首要因素。结合眼前山铁矿生产实际和试验结果,设计-213~-303 m阶段最优的采场结构参数为分段高度22.5 m、进路间距26 m、崩矿步距2.3 m、进路宽度7 m。
Aiming at the problem of ore loss and dilution in mines using caving method, based on orthogonal test, the stope structure was optimized by taking the sublevel height, route spacing, caving step distance and route width as factors, and the ore loss rate, ore dilution rate and preliminary mining coefficient as indexes. According to the orthogonal test scheme and the characteristics of-213~-303 m stage of the eastern ore body in Yanqianshan Iron Mine, the stope ore drawing model was designed with 1∶100 ratio to carry out the ore drawing test. The results show that the order of influencing factors on ore loss rate from large to small is ore caving step distance, sublevel height, route spacing and route width. The sequence of influencing factors of ore dilution rate is sublevel height, caving step distance, route spacing and route width. The order of influencing factors on preliminary mining coefficient is caving step distance, sublevel height, route width and route distance. It is suggested that caving step distance and sublevel height are the primary factors in the design and optimization of stope structure. Combined with the production practice and test results of Yanqianshan Iron Mine, the optimal stope structure parameters at the stage of-213~-303 m are designed as follows: sublevel height of 22.5 m, route spacing of 26 m, caving step distance of 2.3 m, and route width of 7 m.
作者
刘文胜
李广辉
楚长青
张宝金
李光
LIU Wensheng;LI Guanghui;CHU Changqing;ZHANG Baojin;LI Guang(l.Anshan Iron and Steel Group Mining Co.,Ltd,Anshan,Liaoning 114000,China;College of Resources and Civil Engineering,Northeastern University,Shenyang,Liaoning 110819,China)
出处
《矿业研究与开发》
CAS
北大核心
2021年第9期6-11,共6页
Mining Research and Development
基金
“十三五”国家重点研发计划课题(2016YFC0801606)。
关键词
无底柱分段崩落采矿法
采场结构
正交试验
损失率
贫化率
采准系数
Sublevel caving without sill pillar
Stope structure
Orthogonal test
Loss rate
Dilution rate
Preliminary mining coefficient
