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- W2912253070 abstract "Acoustic emission has been recognized as a potentially advanced technique to monitor the efficiency of high-velocity waterjet rock drilling. Identification of AE multi-sources signals becomes fundamental to correlate AE singles and rock drilling efficiency. This paper presents a controlled experimental scheme and frequency analysis to identify different signal sources from waterjet impact and rock failure, respectively. Acoustic signals were decomposed into low, medium, and high-frequency signals by using the variational mode decomposition (VMD) approach. Results indicate that the waterjet impact generates a wideband acoustic signal. The frequency distribution of the high-frequency signals exhibited a strong diversity among four materials because of their different acoustic attenuation. Furthermore, the waterjet pressure did not change the frequency domain distribution of the material. An obvious reduction of the high-frequency signals was observed while waterjet rock drilling. Furthermore, the main frequency of high-frequency signals starts to be time-dependent that causes from the rock failure process. The high-frequency band presented a good correlation with the rate of penetration." @default.
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- W2912253070 date "2019-03-01" @default.
- W2912253070 modified "2023-10-16" @default.
- W2912253070 title "Frequency analysis of multi-sources acoustic emission from high-velocity waterjet rock drilling and its indicator to drilling efficiency" @default.
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- W2912253070 doi "https://doi.org/10.1016/j.ijrmms.2019.01.005" @default.
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