基于多方法联合的露天转地下矿山合理覆岩层厚度研究  

Thickness of covering layer during turning open-pit into underground mining based on multi-method joint application

作　　者：张永达 许洪亮 吴鹏 张建勇 马二辉 刘晓玲 

机构地区：[1]中冶沈勘秦皇岛工程设计研究总院有限公司,河北秦皇岛066000

出　　处：《有色金属（矿山部分）》2017年第6期78-81,共4页NONFERROUS METALS(Mining Section）

摘　　要：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。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 PFC^2D 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 40 m.

关 键 词：露天转地下 无底柱分段崩落法 覆盖岩层厚度 PFC^2D数值模拟 

分 类 号：TD853.36[矿业工程—金属矿开采]