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Acoustic Emission Waveform Characteristics of Red Sandstone Failure under Uniaxial Compression after Thermal Damage

Author

Listed:
  • Herui Zhang

    (School of Urban Geology and Engineering, Hebei GEO University, Shijiazhuang 050031, China
    School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China)

  • Weihong Guo

    (School of Urban Geology and Engineering, Hebei GEO University, Shijiazhuang 050031, China
    Hebei Technology Innovation Center for Intelligent Development and Control of Underground Built Environment, Hebei GEO University, Shijiazhuang 050031, China
    Key Laboratory of Intelligent Detection and Equipment for Underground Space of Beijing-Tianjin-Hebei Urban Agglomeration, Ministry of Natural Resources, Hebei GEO University, Shijiazhuang 050031, China)

Abstract

During the exploitation of deep resources, rocks are often in a high-temperature, high-pressure environment. It is of great significance to study the acoustic emission (AE) characteristics of thermal damaged rock under load to improve the accuracy of monitoring in practical engineering. In this paper, sandstone was heated at different temperatures, before a uniaxial compression test was performed and the AE in the process was monitored. The results show that the strength and AE energy of sandstone decrease gradually with an increase in heating temperature. Through frequency domain analysis of the AE waveform at the time of failure, it was found that the frequency and intensity of AE also showed a downward trend with an increase in temperature. In addition, multifractal theory is introduced to deconstruct the waveform data. The multifractal characteristics of the waveforms decrease with an increase in temperature. It provides new parameters for waveform analysis, which can be combined with frequency analysis as parameters to more accurately identify rock failure in engineering practice. The attenuation of AE of thermally damaged sandstone may be related to an increase in porosity and a decrease in elastic energy release.

Suggested Citation

  • Herui Zhang & Weihong Guo, 2022. "Acoustic Emission Waveform Characteristics of Red Sandstone Failure under Uniaxial Compression after Thermal Damage," Sustainability, MDPI, vol. 14(20), pages 1-12, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13285-:d:943644
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    Cited by:

    1. Kui Zhao & Wenhui Li & Hui Ding & Peng Zeng & Weibin Xiang & Min Zhang & Zhouchao Liu & Yanda Li, 2023. "Experimental Study on the Mechanical and Acoustic Characteristics of Cemented Backfill with Unclassified Tailings at Different Curing Ages under Uniaxial Compression," Sustainability, MDPI, vol. 15(9), pages 1-19, April.

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