Experimental study on soft interlayer impact on blasting vibration signal
ZHAO Xin-tao1; LIU Dong-yan2
1.Safety Engineering Department,Henan Institute of Engineering,Zhengzhou 451191,China;
2.College of Civil Engineering,Chongqing University,Chongqing 400045,China
Abstract：It is obvious that soft interlayer impact on blasting vibration signal. The experiment that how soft interlayer impact on blasting vibration signals was did in a quarry of Nanning suburb, in the experiment, the blasting vibration signal measurement system that is controlled by wireless network is used,and for the lack of previous experiments, the order of dynamite explosion is changed,the experimental results show that: on condition that blasting area is above soft interlayer, the time domain curves of vibration signals are very simple,the peaks of frequency domain curves are very obvious and high frequency components are few; on condition that blasting area is in or below soft interlayer, the time domain curves of vibration signals are complex than the case that blasting area is above soft interlayer, the increase of more high frequency components in the frequency domain curves are obvious, and curves show multi-peaks characteristics.According to experimental results,the approximate and simple method that soft interlayer can be identify by blasting vibration signal is proposed,and the principle and applicability of the method is analysed.
2012, Vol. 31 
