基于3D-σ的改进型分段空场法采场结构优化  

Optimization of Stope Structure for Improved Sublevel Open-Stope Method Based on 3D-σ

作　　者：叶加冕[1,2] 

机构地区：[1]昆明理工大学,云南昆明650093 [2]昆明冶金高等专科学校,云南昆明650033

出　　处：《矿业研究与开发》2012年第4期1-4,42,共5页Mining Research and Development

摘　　要：以莫尔-库仑(Mohr-Coulomb)塑性破坏准则为判据,应用大型三维非线性有限单元法程序3D-σ,对拟定的4种具有不同分段高度、分段数、护顶层厚度及切割槽宽度条件的改进型分段空场采矿法进行数值模拟分析,对切割槽形成后和矿房回采结束后的应力、安全率及塑性区分布进行了对比分析,根据模拟分析结果,确定了最优开采方案。矿山实际应用表明,该采矿方法矿石回采率为65.90%,矿石贫化率9.82%,在控制贫化率的同时,保持了较高的回采率。Based on Mohr - Coulomb plastic failure criterion, by using large - scale three - dimensional nonlinear finite element method program 3D -tr, Simulation analysis was made on the four improved sublevel open - stope methods with different sublevel heights, sublevel numbers, the thicknesses of top - safeguarding layer and widths of cutting groove. The stress, safety rate and plastic zone distribution after formation of cutting groove were analyzed and compared with that after the stoping was finished. According to the simulation results, the optimal scheme was determined finally. The application of actual operation in mines showed that ore recovery rate of the optimized mining method was 65.90% and ore dilution rate was 9.82% ,realizing the control of ore dilution rate while keeping a higher ore recovery rate.

关 键 词：3D-σ 分段空场法 护顶层 难采矿体 数值模拟 

分 类 号：TD853.32[矿业工程—金属矿开采]