张云鹏,葛晓东,武旭,王杰
ZHANG Yun-peng,GE Xiao-dong,WU Xu,WANG Jie

• 1:华北理工大学矿业工程学院
• 2:河北省矿业开发与安全技术重点实验室(华北理工大学)
• 3:北京市市政工程研究院

摘要(Abstract)：

为了研究爆破地震波入射角度对振动和放大效应的影响，采用LS-DYNA数值模拟，从爆破地震波传播的角度分析振动和振动的高程放大效应，并结合现场实测数据，对爆破振动的规律进行分析。结果表明：台阶及其内部各点的振速总体上呈现随高程而减小的趋势；振速的高程放大系数并不是一直线型增加的，而是随着高程的增加先增加后减小；爆破地震波的入射角度不同，在自由面上的反射叠加所产生的振速不同是引起放大效应变化的原因。结合所得数据，建立爆破地震波入射角度的数值计算模型，对此类工程问题的振速计算有一定的参考价值。
In order to study the impact of blasting seismic wave incidence angle on vibrathen and amplification effect, LS-DYNA numerical simulation software is used to analyze the vibration and height amplification effect of vibration from the perspective of blasting seismic wave propagation, and combined with the field measured data, the law of blasting vibration is analyzed. The results show that the vibration velocity of the step and its internal points generally decreases with the elevation; The elevation amplification factor of vibration velocity does not always increase linearly, but first increases and then decreases with the increase of elevation; The different incident angles of blasting seismic waves and the different vibration velocities produced by the reflection and superposition on the free surface are the reasons for the change of amplification effect. Combined with the obtained data, a numerical calculation model for the angle of incidence of blasting seismic waves is established, which has certain reference value for the calculation of vibration velocity of such engineering problems.

关键词(KeyWords)： 爆破振动;数值模拟;台阶地形;放大效应
blasting vibration;numerical simulation;bench topography;amplification effect

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金资助项目(E2016209388)

作者(Author): 张云鹏,葛晓东,武旭,王杰
ZHANG Yun-peng,GE Xiao-dong,WU Xu,WANG Jie

DOI: 10.19931/j.EB.20210162

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