Optimizing Delay Time Interval by the Means of Time - Energy Analysis Based on Wavelet Transform
LING Tong - hua, LI Xi - bing, DAI Ta - gen, PENG Zhen - bin
DOI:10.11835/j.issn.1674-4764.2006.02.011
Received September 25, 2005,Revised September 25, 2005, Accepted , Available online July 01, 2015
Volume ,2006,Pages 36-39
- Abstract
In millisecond blast engineering,the key to achieving millisecond blast is to ascertain reasonable delay time interval.Firstly,the authors make use of time-energy density analysis based on wavelet transform,and get the real delay time by identifying the blast moment of short-delay detonators.Secondly,every sub-signal is separated from measured millisecond blast vibration signal by time-frequency domain transform techniques.Lastly,the Optimized delay time interval is obtained by comparing the superposition effect of sub-signal in different delay time interval.The effectiveness of the proposed method is verified with time-energy density analysis of millisecond blasting vibration signals in an underground project.It shows a high theoretical and practical value,and establishes a theoretical and technical foundation for the study of controlling and forecasting blast vibration damage.