露天矿山边坡动载荷(爆破震动、地震、地面运输)是触发边坡失稳的重要原因之一,影响到露天矿边坡角的确定及边坡防治措施的制定,对矿山安全生产具有重大影响.运用Flac3D数值模拟矿业软件,模拟了北衙金矿东北边坡在加载运输载荷前后的稳定性,分析了运输载荷作用下边坡的最大不平衡力、塑性区和位移的变化.根据模拟研究和分析结果,北衙金矿东北边坡在运输载荷作用下整体稳定、局部失稳;同时,指出了边坡的潜在危险部位,并给出了相应的防治措施,为矿山安全运营提供技术支撑.
The dynamic load(blasting vibration,earthquake and surface transportation) of open mine slopes is one of the important factors triggering slope instability and influences the determination of open mine slope angle as well as the devising of slope control measures,which are crucial to safe production.The paper simulated the stability of the northeast slope of Beiya Gold Mine before and after loading transportation load with Flac3D numerical simulation software,analyzed the variation of maximum unbalanced force,plastic zone and displacement of the slope under transportation load.The simulation and analysis results show that the northeast slope of Beiya Gold Mine under transportation load is generally stable with local instability.And the potential risk spots of the slope were pointed out and prevention measures were put forward.The study provides the basis for technical support of safe mine operation.
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