下盘切岩工艺在四川泸沽铁矿的应用

Application of Footwall Cutting Technology at Lugu Iron Mine,Sichuan

在采用下盘切岩工艺后 ,无底柱分段崩落法可以在缓倾斜中厚矿体中应用。通过对边界品位法及盈亏平衡法的理论分析 ,确定下盘最大切岩高度。针对四川泸沽铁矿的实际情况 ,提出下盘切岩时应采取的具体措施 ,达到多回收矿石、降低贫化 ,取得最大经济效益的目的。

Non-pillar sublevel caving may be used in the mining of gently inclined medium thick orebody when footwall cutting technology is adopted. The greatest height of footwall cutting is determined through the theoretical analysis of cut-off grade method and breakeven point method. In view of the practical conditions of Lugu Iron Mine, Sichuan, measures that should be taken in footwall cutting are suggested so as to recover more ores, reduce the dilution and achieve the greatest econmic benefit.