加大进路间距降低采矿成本

Increasing advance interval to reduce mining costs

从理论上探求了无底柱分段崩落法采矿结构参数的优化方法，并通过国内外同类矿山的成功经验，以及梅山铁矿的实例分析，说明了加大采场进路间距，是降低采矿成本的有效方法。

The optimization method of structure parameters for sublevel caving method without floor pillar was discussed in theory, through the success experience of similar mines at home and abroad, and by the practical analysis of Meishan iron mine, it was shown that increasing the stope advance interval for was an effective way to reduce mining costs.