Time-frequency Characteristics Eztracting and Analysis of Blasting Seismic Wave Based on the Wavelet Packet Transform
In this paper we discuss the transmitting law of blasting seismic waves vibration helt based on the blasting tests in the soft granite. The acceleration attenuation of blasting seismic waves was measured. The designed blast hole was 76 mm in diameter and 5 m in depth, the attenuation parameters k and α were 3698 and 2.046 respectively. Meanwhile the base frequency characteristics of the site varied from 48 to 74 Hz. With the wavelet packet analysis the blasting seismic wave characteristics are extracted, and the attenuation law of wavelet packet in different frequency bands and the scaled distance is studied. Through analyzing dynamic respond attenuation effect of field medium to blasting seismic waves vibration heft, the mechanism of many frequency bands characteristics of blasting seismic wave has been explored.
mechanics of ezplosion blasting seismic wave wavelet packet transform signals characteristics eztraction time-frequency analysis main frequency
YAN Junwei YANG Xusheng LIANG Qiuxiang DU Fugui
Shensi Design Institute of Engineering and Scientific Research, China
国际会议
The Second Asian-Pacific Symposium on Blasting Techniques(第二届亚太地区爆破技术研讨会)
大连
英文
528-533
2009-07-01（万方平台首次上网日期，不代表论文的发表时间）