2100. Experimental study on ground vibration of blasting the boulder with tandem shaped charging warhead
Zhenxiong Wang1, Wenbin Gu2, Jianqing Liu3, Jianghai Chen4, Jinglin Xu5, Xin Liu6
College of Field Engineering, PLA University of Science and Technology, Nanjing, 210007, China
4Unit No. 65307 of PLA, Jilin, 132002, China
E-mail: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com
Received 12 December 2015; received in revised form 8 April 2016; accepted 23 April 2016
Abstract. Hazardous effects of blasting the boulder with the new breaking‑blasting equipment‑tandem shaped charging warhead are mainly air shock wave, seismic wave and blast slung shot. Blast-induced ground vibration is one of the inevitable effects and may cause substantial damage to nearby structures. Started from the formation process and mechanism of ground vibration to study the seismic wave, the research attained curve of vibration velocity of monitoring points by TC-4850 and carried out differential and fast Fourier transform analysis of the curve. And the results concluded that blasting vibration with tandem shaped charging warhead mainly comes from prime charge; the attenuation law can be predicted by Sadev’s Formula. Explosion vibration frequency range is 20-150 Hz, while with the increase of distance from the blasting center, blasting vibration intensity attenuates rapidly, vibration duration increases and vibration frequency gradually reduces. Compared with general rock blasting, its attenuation rate of blasting vibration is faster with higher frequency and smaller impact on buildings, but the harm effects should not be ignored for the special application environment.
Keywords: tandem shaped charging warhead, ground vibration, seismic wave, experimental study.
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Cite this article
Wang Zhenxiong, Gu Wenbin, Liu Jianqing, Chen Jianghai, Xu Jinglin, Liu Xin Experimental study on ground vibration of blasting the boulder with tandem shaped charging warhead. Journal of Vibroengineering, Vol. 18, Issue 5, 2016, p. 2986‑2996.
© JVE International Ltd. Journal of Vibroengineering. Aug 2016, Vol. 18, Issue 5. ISSN 1392-8716