Geomechanics and Engineering

  • 제37권2호
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  • Pages.149-166
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  • 2024
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Acoustic emission characteristics under the influence of different stages of damage in granite specimens

  • Jong-Won Lee (Research Institute of Industrial Technology, Pusan National University) ;
  • Tae-Min Oh (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Hyunwoo Kim (Mineral Exploration and Mining Research Center, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Min-Jun Kim (Deep Subsurface Storage & Disposal Research Center, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Ki-Il Song (Department of Civil Engineering, Inha University)
  • 투고 : 2023.11.27
  • 심사 : 2024.03.31
  • 발행 : 2024.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The acoustic emission (AE) technique is utilized to estimate the rock failure status in underground spaces. Understanding the AE characteristics under loading conditions is essential to ensure the reliability of AE monitoring. The AE characteristics depend on the material properties (p-wave velocity, density, UCS, and Young's modulus) and damage stages (stress ratio) of the target rock mass. In this study, two groups of granite specimens (based on the p-wave velocity regime) were prepared to explore the effect of material properties on AE characteristics. Uniaxial compressive loading tests with an AE measurement system were performed to investigate the effect of the rock properties using AE indices (count index, energy index, and amplitude index). The test results were analyzed according to three damage stages classified by the stress ratio of the specimens. Count index was determined to be the most suitable AE index for evaluating rock mass stability.

키워드

과제정보

This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. NRF-2022R1I1A3065299) and by the Brain Korea 21 FOUR Project in the Education & Research Center for Infrastructure of Smart Ocean City (i-SOC Center) (Grant No. 4199990614525).

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