多台阶地形爆破地震波传播规律分析及爆破振速预测公式修正

发布时间：2018-06-18 02:17

本文选题：多台阶地形 + 爆破振动　；参考：《矿业研究与开发》2017年05期

【摘要】：研究多台阶地形爆破地震波传播规律,并对表征高程的爆破振速预测公式进行验证。通过实际测量与数值模拟的方法,分析确定:高台阶地形的坡顶与坡脚处的高程放大作用均随着高程的增加而先增大后减小;在高程不变的情况下,沿着台阶水平面向两侧延伸,振动速度也存在放大效应,且此放大效应呈现先增大后减小的趋势;目前表征高程放大效应的爆破振速预测公式在爆破震动传播方向与台阶坡面垂直的情况下较为准确,但是,当高程不变,爆心距沿台阶坡面不断增大时,其公式的准确性大幅下降。通过对模拟数据的高斯拟合,建立了更为准确的爆破振速预测公式。
[Abstract]:This paper studies the propagation law of blasting seismic waves of multi step terrain blasting, and verifies the prediction formula of blasting vibration velocity that characterizing the elevation. Through the actual measurement and numerical simulation, it is determined that the elevation enlargement of the top of the high stage terrain and the elevation at the foot of the slope first increases and then decreases with the elevation. The step level is extended on both sides, and the vibration velocity also has the amplification effect, and the amplification effect presents the trend of increasing first and then decreasing. At present, the prediction formula of blasting vibration speed is more accurate when the blasting vibration propagation direction is perpendicular to the step slope surface, but when the height is constant, the blasting center distance is along the step slope. The accuracy of the formula is greatly reduced when it is increasing. Through the Gauss fitting of the simulated data, a more accurate prediction formula for blasting vibration velocity is established.
【作者单位】：华北理工大学河北省矿业开发与安全技术重点实验室;河北钢铁集团矿业有限公司;唐山三友矿山有限公司;
【基金】：河北省自然科学基金项目(E2016209388)
【分类号】：TD235.1

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