某铁矿无底柱分段崩落法的参数优化研究

A Study on Parametric Opitimization of Pillarless Sublevel Caving for a Iron Ore

结合云南某铁矿的生产地质条件和矿石的赋存条件,运用PFC3D数值模拟软件建立矿山采场的放矿模型,对该矿山采场结构参数,即崩矿步距,进路间距尺寸和分段高度进行优选。利用回贫差值大小衡量结构参数组合的优劣情况,即回贫差值越大,放矿效果越好,采场结构参数越优,反之,则差。通过正交试验设计建立9组不同的采场参数组合,并分别对9组试验验建立对应的PFC数值放矿模型,对最后的实验结果进行分析,经统计研究,最终确定该矿山的最优采场结构参数组合为分段高度为30 m,进路间距25 m,崩矿步距6 m。

Based on the geological conditions of production and the conditions of occurrence of an iron ore in Yunnan Province,the ore drawing model of mine stope was established by using PFC3D numerical simulation software.The structural parameters of the mine stope,that is,the interval of collapse and segment height.Using the difference between the poor and the poor,we know the structural parameters of the combination of the advantages and disadvantages of poor conditions is：the greater the difference back to the poor is,the better the effect of ore is,and stope structure parameters is better.Otherwise,it is poor.Nine sets of different stope parameter combinations were established by orthogonal experiment design,and the corresponding PFC numerical model was established respectively.The final experimental results were analyzed and statistically studied to determine the optimum of the mine.The combination of stope structure parameters is segment height of 30 m,with the approaching space of 25 m and collapse interval of 6 m.