Multi-fractal detrended fluctuation analysis of the blasting vibration signal in a frozen shaft
FU Xiaoqiang1,2，YANG Renshu3，CUI Xiuqin1,2，LIU Xing1,2，LIU Jifeng1,2，LEI Zhen4
1.School of Civil Engineering, Sanming University, Sanming 365004, China;
2.Key Laboratory of Engineering Material & Structure Reinforement in Fujian Province College, Sanming University, Sanming
365004, China; 3.School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4.Institute of Mining Engineering, Guizhou Institute of Technology, Guiyang 550003, China
Considering that the multi-fractal analysis based on the partition function is not conducive to highlighting the local scale characteristics,the multi-fractal detrended fluctuation analysis (MF-DFA) method was introduced into the field of blasting vibration signal analysis.The results show that the vertical shaft blasting vibration signal has multi-fractal characteristics, the MF-DFA spectrum and multi-fractal singular spectrum have significant diversity for the explosive loading form in the cases of different settlement types of peripheral holes, so, they can be used as characteristic parameters to distinguish the structure form of peripheral charge.The MF-DFA spectrum diagram and related parameters can characterize the vibration response state of the shaft lining under different blasting schemes.The study provides an effective method for the identification and classification of blast hole charge structure and charge parameters.
付晓强1,2，杨仁树3，崔秀琴1,2，刘幸1,2，刘纪峰1,2，雷振4. 冻结立井爆破振动信号多重分形去趋势波动分析[J]. 振动与冲击, 2020, 39(6): 51-58.
FU Xiaoqiang1,2，YANG Renshu3，CUI Xiuqin1,2，LIU Xing1,2，LIU Jifeng1,2，LEI Zhen4. Multi-fractal detrended fluctuation analysis of the blasting vibration signal in a frozen shaft. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(6): 51-58.
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