自然崩落法超前拉底数值模拟研究  

Numerical Simulation Study on Advanced Undercutting in Block Caving Method

作　　者：梁江波 刘华武 冯兴隆 

机构地区：[1]云南迪庆有色金属有限责任公司,云南香格里拉市674400

出　　处：《矿业研究与开发》2017年第2期93-96,共4页Mining Research and Development

摘　　要：自然崩落法拉底与聚矿槽施工的先后顺序直接影响着底部结构的稳定性,对其进行优化研究是非常必要的。运用模拟软件FLAC^(3D)建立数值模型,假设拉底超前聚矿槽,模拟分析超前拉底条件下,底部结构的应力、塑性区变化情况,研究结果表明,在拉底推进线附近区域的底部结构处于应力集中状态,在推进线后方45m左右范围内,应力发生释放,有利于底部结构的稳定及聚矿槽的开挖。The construction sequence of undercutting and drawbell in block caving method affected the stability of bottom structure directly. Therefore, it was fairly necessary to study the excavation sequence of the undercutting and drawbell. Assuming that construction of undercutting was ahead of drawbell, the numerical model was established by FLAC3D, so as to simulate and analyze the change of stress and plastic zone in bottom structure under advanced undercutting. The research results showed that the bottom structure near the undercutting line was in stress concentration condition. When the region about 45 m behind the undercutting line had stress relief, it was helpful to the stability of bottom structure and the excavation of drawbell..

关 键 词：自然崩落法 底部结构 稳定性模拟分析 超前拉底 

分 类 号：TD853.364[矿业工程—金属矿开采]