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- W2363548424 abstract "In order to determine whether the impact damage of coal produces SLF /ELF electromagnetic signal in the process of coal and rock dynamic disasters,the change law of electromagnetic signal under different impact speed was studied using Split Hopkinson Pressure Bar(SHPB) experimental system and ZDKT- 1 transient magnetic field test system. Subsequently,the Hilbert spectrum signature of abnormal electromagnetic signal was analyzed and the SLF /ELF electromagnetic effect in the process of coal impact damage was confirmed. In addition,the relationship between the impact dissipation energy and the energy of electromagnetic anomaly was studied. Results show that there is SLF /ELF electromagnetic signal in the impact damage process of coal body,and the dominant frequency of electromagnetic anomaly is 0- 30 Hz. Furthermore,the amplitude of electromagnetic signal has positive linear correlation with impact velocity,and the relationship between the energy of electromagnetic signals and the impact velocity is quadratic polynomial. Impact dissipation energy and electromagnetic energy have same rising trend with the increase of impact velocity.Therefore,the internal damage of coal can be described by the strength of SLF /ELF electromagnetic signal." @default.
- W2363548424 created "2016-06-24" @default.
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- W2363548424 date "2014-01-01" @default.
- W2363548424 modified "2023-09-28" @default.
- W2363548424 title "Characteristic analysis of SLF /ELF electromagnetic anomaly in the process of coal impact damage" @default.
- W2363548424 hasPublicationYear "2014" @default.
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