Effects of buffer hole on amplitude-frequency features of blast vibration signals

被引：0
|
作者：
Zhou J. [1 ,2 ,3 ]
Wang X. [2 ]
Gong M. [1 ]
Zhao M. [3 ]
Tao T. [3 ]
机构：
[1] Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing
[2] Beijing General Research Institute of Ming & Metallurgy, Beijing
[3] Guizhou Xinlian Blast Engineering Group Co., Ltd., Guiyang
来源：
| 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Amplitude-frequency characteristics; Buffer hole; Numerical simulation; Vibration reduction rate; Wavelet packet analysis;
D O I：
10.13465/j.cnki.jvs.2020.01.032
中图分类号：
学科分类号：
摘要：
In order to investigate effects of buffer hole on blast vibration signals' peak vibration velocity, main vibration frequencies and frequency band energy distribution, blast vibration tests of adjacent slope in a certain open-pit mine of Guizhou province were conducted to get blast vibration signals without and with buffer holes onsite. The wavelet packet analysis method and the numerical simulation one were used to analyze these vibration signals, respectively. The results showed that adjacent slope buffer blast has obvious vibration reduction effect; under the same measurement conditions, horizontal tangential vibration signals have the maximum vibration reduction rate and the best vibration reduction effect; the more close to explosion source, the better vibration reduction effect; blast vibration energy signals' energy is concentrated in the range of 0-60 Hz and energy distribution is extremely uneven with several main vibration frequency bands; when performing adjacent slope blast with buffer holes, blast vibration signals' energy is more focused on main vibration frequency bands of high frequency, and avoids natural vibration frequencies of slope. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：240 / 244and280
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