Experimental study on failure precursors of coal and sandstone based on two‐step clustering of acoustic emission characteristics
Menghao Zheng,
Yunpei Liang,
Quangui Li
et al.
Abstract:Accurately determining the precursors of coal and rock failures is crucial for preventing associated risks in coal mines. In this study, based on the values of the four parameters amplitude, duration, counts and energy of acoustic emission (AE) signals, the AE signals of coal and sandstone samples failure were clustered by the two‐step clustering method. And the precursory AE signals of sample failure under uniaxial compression were analyzed and identified. Results show that the peak of AE amplitude is before … Show more
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