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Research on Vibration Law of Underground Shallow Hole Blasting Based on EMD-HHT |
Received:November 02, 2020 Revised:November 04, 2020 |
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DOI: |
KeyWord:Shallow hole blasting;Vibration law;Monitoring system;Peak vibration velocity;EMD-HHT |
Author | Institution |
ZHANG Qihu |
昆明理工大学 国土资源工程学院 |
ZHANG Xi |
玉溪矿业有限公司 |
SUN Jinhui |
云南铜业股份有限公司矿山研究院 |
FAN Tianlin |
玉溪矿业有限公司 |
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Abstract: |
In order to study the problem of excessive earthquake intensity in the blasting operation of shallow hole underground in the Guanfang section of Jinsha mining, the blasting vibration monitoring method was adopted to monitor two blasting operations with different explosive quantities on the surface. Based on HHT method and EMD decomposition, the peak vibration velocity, frequency and amplitude of shallow hole blasting seismic signal were analyzed. The results showed that the peak vibration velocity reflected the blasting vibration intensity and the maximum load area, and the main vibration frequency reflected the dynamic response of the construction under blasting operation. The dominant energy frequency band of blasting vibration signals of underground shallow holes were all in the range of 10~50 Hz, and the main vibration frequency of blasting was generally different under different charges. The vibration frequency tended to concentrate towards low frequency and increase in instantaneous input energy with the increase of charges. |
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