摘要
针对粉状矿体工程地质特征,采用理论分析、数值模拟、物理模拟和现场放矿试验验证的研究体系,得到粉矿地段无底柱分段崩落采矿法合理大结构参数为14m×16m×3.4m。经现场应用,回收率达86.47%,矿石贫化率为21.65%,取得了较好的经济效益。粉状矿体地段无底柱分段崩落采矿法大间距结构模型,总体变化趋势是,总回收率、纯矿石回收率随着放矿步距的增大而增大,而岩石混入率则随着放矿步距的增大而减小;回收指标受放矿步距影响显著,在设备铲装能力许可的条件下,还可以进一步加大步距0.4m左右,即放矿步距为3.8m。
According to the characteristics of powdery orebody engineering geology,we adopts the research system including theoretical analyses,numerical simulation,physical simulation and the spot ore-drawing tests,etc.,and get the logical large structure parameter of powdery orebody non-pillar sublevel caving method,being 14 m×16 m× 3.4 m.The application experiments show：the recovery ratio is 86.47%,the loss ratio is 21.65%and the stope can get better economic benefits;with the increasing of ore-drawing space,the total recovery rate and ore recovery rate will increase and the rock mixed rate will decrease in the mass;the recovery index is very sensitive to the oredrawing space.In the condition that the ability of equipment bucket approbates,the paper suggests the stope can increase the space to 3.8 m.
出处
《黄金》
CAS
北大核心
2010年第4期23-27,共5页
Gold
关键词
粉矿
无底柱分段崩落采矿法
大结构参数
powdery orebody
non-pillar sublevel caving method
large structure parameter
