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崩落法采矿的特点是覆岩下放矿,不合理的结构参数极易加大开采贫损指标,导致资源浪费和经济效益下降。结合梅山铁矿大间距高分段工业实验中崩矿步距优化研究,采用相似材料放矿试验和计算机放矿仿真模拟,开展80°、85°、90°端壁倾角下3.6,4,4.4,4.8 m四个步距9个物理放矿仿真实验的放矿方案的仿真放矿实验研究,以回贫差和纯矿回收率最大为判据,对实验数据进行综合分析研究,得到梅山铁矿分段高度18 m,进路间距20 m条件下,崩矿步距为4.4 m,端壁倾角为88°～90°时,放矿效果最好。
Caving method is characterized by overburden ore underburden, irrational structural parameters easily increase mining loss index, resulting in a waste of resources and economic benefits. Combining with the optimization of the collapse process in the large-span and high-section industrial test of Meishan Iron Mine, the similar materials were used to carry out the ore-loading test and the computer simulation of ore drawing to carry out the simulation of the tilting angle at the angles of 80 °, 85 ° and 90 °, , 4.8 m four step from 9 physical ore release simulation program of the experimental study of the ore discharge simulation to the maximum return difference and pure ore recovery rate as the criterion for a comprehensive analysis of the experimental data to get Meishan Iron The result of ore-dressing is the best when the section height is 18 m and the interval is 20 m, the collapse step is 4.4 m and the wall inclination is 88 ° -90 °.