杨家坝铁矿放矿规律的模拟仿真  

Numerical Simulation of Ore Drawing Rule in Yangjiaba Iron Ore

作　　者：孙锋刚[1] 纪方舟[1] 吕康亭[1] 寇坤[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055

出　　处：《矿业研究与开发》2013年第1期9-10,55,共3页Mining Research and Development

基　　金：国家大学生创新性实验计划;西安建筑科技大学学科重点培育计划基金项目(E09003)

摘　　要：利用颗粒流的离散元法,对杨家坝铁矿无底柱分段崩落法在覆岩下放矿的崩落矿岩移动规律,以及矿石损失与贫化过程进行了数值模拟仿真。对3种放矿方案进行了模拟分析,得出3个漏斗口依次同时放矿,即第一放出口放出1/3矿岩时第二放出口开始放矿,在其放出1/3矿岩的同时启动第三放出口放矿,并依次向后递推放矿的方案最优,采场工业验证试验贫化率为8%,损失率为9%,大大提高了企业的经济效益。The numerical simulation on the movement rule of caved ore-rock and ore dilution and losses in ore drawing un- der overburden for pillarless sublevel caving method in Yang]iaha iron mine was conducted with discrete element method, and three programs of ore-drawing were simulated and analyzed. As the result, the best program is to discharge caved ore from three funnel-shaped openings successively, when one third of the caved ore in the scope of the first fun nel-shaped opening has been discharged the caved ore in the scope of the second funnel-shaped opening begin to be dis- charged, and when one third of the caved ore in the scope of the second funnel-shaped opening has been discharged also the caved ore in the scope of the third funnel-shaped opening begin to be discharged, ore drawing from funnel-shaped o- penings is advanced backward in the proper order. The field trial proved that ore dilution rate was 8% and ore loss rate was 9%. The economic benefit of the mine has been im- proved greatly.

关 键 词：无底柱分段崩落法 放出体 截止品位 放矿管理 

分 类 号：TD853.362[矿业工程—金属矿开采]