露天矿边坡开挖爆破震动动力响应分析

介绍了某露天矿高陡边坡计算模型的概化方法、建立方式.利用自编程序，将爆破震动实测速度时程曲线转化为加速度时程曲线作为计算荷载，对该边坡爆破开挖进行了ANSYS有限元应力、位移、速度响应时程分析.分析结果表明，尽管此次爆破的震动速度最大值超标，各种应力在坡脚底部存在应力集中现象，但各应力值都较小，边坡没有发生任何塑性变形；随着爆破规模的增大，出现了明显的放大效应和惯性滞后效应.

Analysis of dynamic response on blasting vibration about excavated slope in a surface mine

Introduced the method of simple model and the way of setting up model to high and steep slope in a surface mine in detail, and utilized procedure plaited by oneself, and regarded accelerated time-history curve transformed from fact tested speed time-history of blasting vibration as calculated loading, and analyzed of ANSYS finite element of time-history of stress, displacement and speed response to this excavated blasting slope. The resuhs of time-history analysis indicate that, although the maximum speed of blasting vibrations exceeds the standard, various stress has stress concentrate phenomenon in slope bottom, each stress is less, and the slope did not create any plastic shape ; with the increasing of the blasting scale, the blasting vibration appears obvious magnifying effect and inertia hysteretic effect.