An Improved Rock Damage Characterization Method Based on the Shortest Travel Time Optimization with Active Acoustic Testing

Jing Zhou, Lang Liu (), Yuan Zhao, Mengbo Zhu, Ruofan Wang and Dengdeng Zhuang
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Jing Zhou: Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
Lang Liu: Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
Yuan Zhao: Department of Civil Engineering, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 712000, China
Mengbo Zhu: Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
Ruofan Wang: Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
Dengdeng Zhuang: Energy School, Xi’an University of Science and Technology, Xi’an 710054, China

Mathematics, 2024, vol. 12, issue 1, 1-21

Abstract: Real-time evaluation of the damage location and level of rock mass is essential for preventing underground engineering disasters. However, the heterogeneity of rock mass, which results from the presence of layered rock media, faults, and pores, makes it difficult to characterize the damage evolution accurately in real time. To address this issue, an improved method for rock damage characterization is proposed. This method optimizes the solution of the global shortest acoustic wave propagation path in the medium and verifies it with layered and defective media models. Based on this, the relationship between the inversion results of the wave velocity field and the distribution of rock damage is established, thereby achieving quantitative characterization of rock damage distribution and degree. Thus, the improved method is more suitable for heterogeneous rock media. Finally, the proposed method was used to characterize the damage distribution evolution process of rock media during uniaxial compression experiments. The obtained results were compared and analyzed with digital speckle patterns, and the influencing factors during the use of the proposed method are discussed.

Keywords: rock damage; non-destructive testing; inversion of wave velocity field; damage characterization (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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