爆源因素对岩体开挖爆破振动频谱特性的影响研究

李鹏; 卢文波; 吴新霞; 陈明; 严鹏

doi:10.3969/j.issn.1001-5485.2014.11.0352014,31(11):182-188

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11) : 182-188. DOI: 10.3969/j.issn.1001-5485.2014.11.0352014,31(11):182-188

工程设计与施工监控

爆源因素对岩体开挖爆破振动频谱特性的影响研究

李鹏¹,卢文波²,吴新霞¹,陈明²,严鹏²

作者信息 +

Influence of Blast Source Parameters on Spectral Characteristics of Vibration Induced by Blast of Rock Mass

LI Peng¹,LU Wen-bo²,WU Xin-xia¹,CHEN Ming²,YAN Peng²

Author information +

文章历史 +

摘要

为了更好地控制爆破振动的影响,通过理论分析推导了三角形爆炸荷载的频域表达式及球状药包、长柱状药包爆炸诱发振动的频域解析解,并采用基于爆炸荷载等效模拟的动力有限元方法分析了单孔爆破诱发振动的主频衰减规律,在此基础上讨论了爆源因素对岩体开挖爆破振动频谱特性的影响。结果表明,爆源因素对爆破振动频谱构成及主频衰减规律具有一定的影响。爆破荷载上升时间主要影响爆破振动的频谱范围;爆破荷载持续时间、装药量及装药结构等因素主要影响爆破振动频谱的高低频成分比例及主频衰减速度。

Abstract

This research is conducted in the aim of better controlling the impact of blasting vibration. The spectral expression of triangle blast load and the spectral solution of vibrations induced by the blast sources of sphere charge and cylinder charge are derived through theoretical analysis. The regularity of main frequency attenuation of vibration induced by single hole blast is investigated by the dynamic finite element method based on the equivalent simulation of blast load. On this basis, the influence of blast source parameters on spectral characteristics of vibration induced by blast of rock mass is discussed. The results indicate that the spectral composition and main frequency attenuation law of blasting vibration are dependent on the parameters of the blast source. The time of blast load buile-up mainly affects the spectral range, while factors such as the time of blast load reduction, the charge weight and the charge structure mainly affect the high and low frequency proportions and the frequency attenuation rate of blasting vibrations.

导出引用

李鹏,卢文波,吴新霞,陈明,严鹏. 爆源因素对岩体开挖爆破振动频谱特性的影响研究[J]. 长江科学院院报. 2014, 31(11): 182-188 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0352014,31(11):182-188

LI Peng,LU Wen-bo,WU Xin-xia,CHEN Ming,YAN Peng. Influence of Blast Source Parameters on Spectral Characteristics of Vibration Induced by Blast of Rock Mass[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 182-188 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0352014,31(11):182-188

中图分类号： TV542

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