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杨家坝铁矿采用无底柱分段崩落法开采,由于采场结构参数不够合理,损失贫化较大。结合杨家坝铁矿的具体情况,建立物理相似模型,进行漏斗放矿模拟研究,分析放出体形态,即分析不同分段高度和进路间距下的近似椭球体,确定了合理的采场结构参数,即最佳分段高度H=12m,最佳的进路间距B=24m。进行半工业放矿模拟,计算不同放矿模式下的损失贫化率,结果表明,当3个出矿口同时放矿时,最为经济合理。对采场结构参数进行了优化,提出了科学的放矿管理模式,贫化率8%,损失率10%。降低了损失贫化率,提高了矿山的经济效益。
Yangjiaba iron ore pillarless caving method, due to stope structure parameters is not reasonable enough, loss of greater depletion. According to the specific conditions of Yangjiaba Iron Mine, a physical similarity model was established, and the funnel discharge simulation was carried out. The shape of the discharge body was analyzed, that is, the approximate ellipsoid under different segment heights and approach distances was analyzed and a reasonable stope structure The parameter, ie the best segment height H = 12m, the best route spacing B = 24m. The semi-industrial ore-dressing simulation was carried out to calculate the loss-reduction rate under different ore-dressing modes. The results showed that the economic and reasonable rates were the most reasonable when the three ore-discharging mines were simultaneously discharged. The stope structure parameters are optimized, and a scientific management mode of ore discharge management is put forward, with a depletion rate of 8% and a loss rate of 10%. Reduce the loss rate of depletion and improve the economic efficiency of mines.