基于多方法联合的露天转地下矿山合理覆岩层厚度研究

在露天转地下过程中需人工强制形成覆盖岩层,其对无底柱分段崩落法至关重要,不仅影响矿石回采安全,而且影响矿石回收。因此,研究覆盖岩层厚度对矿山生产具有重要意义。采用理论分析计算及PFC2D数值模拟的手段,对新疆诺尔湖铁矿露天转地下采场覆岩层厚度进行分析研究,确定该矿采场的合理覆盖岩层厚度为40m。

The Study on Thickness of Covering Layer When Turning Open Pit into Underground Mining at Nuoerhu

It is necessary to manually forcibly form the cover rock during the process of the open-pit to underground. However the overburden thickness is very import for the sublevel caving method, which not only affects the safety of ore recovery , but also affects the recovery of ore. Therefore, it is important for mine production to research the reasonable overburden thickness. In this paper, the theoretical analysis and PFC2D numerical simulation are used to analyze the thickness of the overburden layer of transition from open-pit to underground mining in Nuoerhu iron mine, the reasonable thickness of the overburden is 40m.