新城金矿中段顶柱盘区回采顺序优化

针对新城金矿-580 m中段顶柱的安全高效回采问题，提出4种盘区回采顺序，对不同的回采顺序方案进行优化研究。首先，利用3GSM非接触数字扫描系统对-580 m中段采场顶板和两帮进行结构面调查，并依据Hoek-Brown强度准则得到岩体的物理力学参数；其次，构建含有巷道、假顶等在内的三维可视化模型并对回采过程进行数值模拟。最后，通过对比分析不同回采顺序条件下采场等关键部位的应力、位移的动态响应特性，并结合各方案顶板的破坏情况，确定了最优的回采顺序。模拟结果对新城金矿顶柱盘区的安全回采具有一定的参考价值。

Optimization of Panel Mining Sequence for the Middle-section Top Pillar of Xincheng Gold Mine

College of Resources and Civil Engineering,Northeastern University Focusing on the safe and high-efficient recovery of top pillars at -580 m level of Xincheng Gold Mine，four panel mining sequences were proposed and each panel mining sequence is optimized.Firstly，the structural planes at stope roof and sidewall at -580 m level middle section were characterized with the advanced ShapeMetrix 3D digital photogrammetry measuring system，and the physical and mechanical parameters were calculated according to the Hoek-Brown strength criterion.Then，3D visualization models containing roadways and man-made roof were constructed and adopted to make numerical simulation on the excavation processes.Finally，through analyzing on and comparing with the excavation-induced response of principle stress and deformation around the stope and other key positions，together with the damage around the stope under the different schemes，the optimal mining sequence is determined.The numerical results may provide reference for the safe recovery of top pillars at Xincheng Gold Mine.