Effects of buffer hole on amplitude-frequency features of blast vibration signals
ZHOU Jianmin1,2,3, WANG Xuguang2, GONG Min1, ZHAO Mingsheng3, TAO Tiejun3
1. Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing General Research Institute of Ming & Metallurgy, Beijing 100160, China;
3. Guizhou Xinlian Blast Engineering Group Co., Ltd., Guiyang 550002, China
Abstract：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.
周建敏1,2,3，汪旭光2，龚敏1，赵明生3，陶铁军3. 缓冲孔对爆破振动信号幅频特性影响研究[J]. 振动与冲击, 2020, 39(1): 240-244.
ZHOU Jianmin1,2,3, WANG Xuguang2, GONG Min1, ZHAO Mingsheng3, TAO Tiejun3. Effects of buffer hole on amplitude-frequency features of blast vibration signals. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 240-244.
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