阿舍勒铜矿采场结构参数优化及数值分析

Optimization and Numerical Analysis of Stope Structure Parameters of Ashele Copper Mine

在矿山深部开采过程中,合理的采场结构参数及回采方式对采场安全影响较大。以阿舍勒铜矿为研究背景,以采区高度、回采方式为优化元素,分析回采过程中的围岩变形、塑性区特征及应力分布规律,探讨在该地质条件下的最优回采参数方案。结果表明,回采过程中,应力集中主要出现在采场边角部,上盘应力集中较下盘大;塑性破坏区主要集中在采场两帮和顶板;采场周边充填体塑性破坏范围随着开挖而明显增加。最大位移主要出现在开挖采场顶、底板,两帮和上下盘的位移相对较小。通过对比不同参数优化方案,阿舍勒铜矿矿区采区高度为100 m,自下而上划分为6个采区,采用预留10 m顶柱的回采方案最优。

In the process of deep mining in mines,reasonable stope structure parameters and mining methods have a greater impact on stope safety.Taking the Ashele Copper Mine as the research back⁃ground,taking the height of the mining area and the mining method as the optimization elements,the sur⁃rounding rock deformation,the characteristics of the plastic zone and the stress distribution law during the mining process,and discuss the optimal mining parameter scheme under the geological conditions are ana⁃lyzed.The results show that during the stoping process,the stress concentration mainly occurs in the cor⁃ners of the stope,and the stress concentration on the hanging wall is larger than that of the foot wall.The plastic failure zone is mainly concentrated on the two sides of the stope and the roof.The plastic failure range of the filling body around the stope increases obviously with the excavation.The maximum displace⁃ment mainly occurs on the top and bottom of the excavation stope,and the displacements of the two sides and the upper and lower walls are relatively small.By comparing different parameter optimization schemes,the mining area height of Ashele Copper Mine is 100 m,which is divided into 6 mining areas from bottom to top,and the optimal stoping scheme with a reserved 10 m top pillar is adopted.