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Wave Velocity and Power Spectral Density of Hole-Containing Specimens with Different Moisture Content under Uniaxial Compression

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  • Tian-jun Zhang

    (College of Science, Xi’an University of Science and Technology, Xi’an 710054, China
    School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Lei Zhang

    (School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Shu-gang Li

    (School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Jia-lei Liu

    (College of Science, Xi’an University of Science and Technology, Xi’an 710054, China
    China Gezhouba Group No.5 Engineering Co., Ltd., Yichang 443002, China)

  • Hong-yu Pan

    (School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Xiang Ji

    (College of Science, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

The gas drainage borehole is a typical hole-containing structure, and its failure is similar to the hole-containing specimen. To study the characteristics of wave velocity and power spectral density of the hole-containing specimens with different moisture content, an ultrasonic test of the hole-containing specimens during destruction was carried out. A waveform with different moisture contents was recorded by the RSM-SY7 system. The wave velocity and power spectral density was calculated to analyze its relationship with moisture content and degree of damage. The results show that the wave velocity of the hole-containing specimens gradually decreases during the destruction. There were 3 stages of attenuation of wave velocity during the destruction, which were stable, slightly reduced, and rapidly decreasing stages. Changes in moisture content would cause changes of duration of the three stages. The power spectral density gradually decreases during the destruction. The moisture content affected the attenuation mode of the power spectral density and the amount of attenuation. In the detecting of the gas borehole, the wave velocity and the power spectral density can be used to locate the damage area. This research provides a theoretical basis for detection engineering.

Suggested Citation

  • Tian-jun Zhang & Lei Zhang & Shu-gang Li & Jia-lei Liu & Hong-yu Pan & Xiang Ji, 2018. "Wave Velocity and Power Spectral Density of Hole-Containing Specimens with Different Moisture Content under Uniaxial Compression," Energies, MDPI, vol. 11(11), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3166-:d:183071
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    References listed on IDEAS

    as
    1. Tianjun Zhang & Lei Zhang & Shugang Li & Jialei Liu & Hongyu Pan & Shuang Song, 2017. "Stress Inversion of Coal with a Gas Drilling Borehole and the Law of Crack Propagation," Energies, MDPI, vol. 10(11), pages 1-14, October.
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    Cited by:

    1. Chen Jing & Lei Zhang, 2022. "Characterization of Tensile Crack Propagation and Energy Evolution during the Failure of Coal–Rock Samples Containing Holes," Sustainability, MDPI, vol. 14(21), pages 1-13, November.

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