传感器放置位置对花岗岩岩爆声发射频谱特征的影响

doi:10.13722/j.cnki.jrme.2018.0639

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Abstract

True-triaxial unloading rock burst experiments on granite samples were conducted with the acoustic emission(AE) transducers being placed directly on the rock sample and on the rock-sample holding plate respectively，in order to obtain the precise information for rock burst tests based on AE signal analysis. Six key waveforms of the AE data selected according to the three typical rock burst failure stage were selected from the AE data in each of the rock burst experiments for the comparative analyses. The results illustrate the fact that the holding plate is equivalent to a low-pass filter filtrate the low-band information of the AE signal which is the important information about the rock macroscopic failure；AE acquired in the transducer directly mounted on the rock sample have the whole band information indicating the microscopic fracturing till eventual macroscopic failure. Besides，the holding plate damps the magnitude of the AE signal，that is，the signal-to-noise ratio is reduced，which may make it difficult to identify some main amplitude information.

Key words： rock mechanics acoustic emission transducer data collection filter signal to noise ratio

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	Articles by authors
	JIA Xuena1
	JIANG Quanguo2
	HE Manchao3
	GONG Weili3

Cite this article:

JIA Xuena1,JIANG Quanguo2,HE Manchao3, et al. The influence of position of sensor placement on the spectral characteristics of the acoustic emission during the process of rock burst[J]. , 2018, 37(S2): 3968-3978.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0639 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/3968

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