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Article

Study on Mechanical and Acoustic Emission Characteristics of Backfill–Rock Instability under Different Stress Conditions

School of Resources and Safety Engineering, Central South University, Changsha 410083, China
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Author to whom correspondence should be addressed.
Submission received: 7 May 2024 / Revised: 28 May 2024 / Accepted: 17 June 2024 / Published: 25 June 2024
(This article belongs to the Section Navigation and Positioning)

Abstract

Unveiling the mechanical properties and damage mechanism of the complex composite structure, comprising backfill and surrounding rock, is crucial for ensuring the safe development of the downward-approach backfill mining method. This work conducts biaxial compression tests on backfill–rock under various loading conditions. The damage process is analyzed using DIC and acoustic emission (AE) techniques, while the distribution of AE events at different loading stages is explored. Additionally, the dominant failure forms of specimens are studied through multifractal analysis. The damage evolution law of backfill–rock combinations is elucidated. The results indicate that DIC and AE provide consistent descriptions of specimen damage, and the damage evolution of backfill–rock composite specimens varies notably under different loading conditions, offering valuable insights for engineering site safety protection.
Keywords: acoustic emission; sensor network; mechanical property; damage evolution acoustic emission; sensor network; mechanical property; damage evolution

Share and Cite

MDPI and ACS Style

Dong, L.; Yan, M.; Chen, Y.; Yang, L.; Sun, D. Study on Mechanical and Acoustic Emission Characteristics of Backfill–Rock Instability under Different Stress Conditions. Sensors 2024, 24, 4112. https://0-doi-org.brum.beds.ac.uk/10.3390/s24134112

AMA Style

Dong L, Yan M, Chen Y, Yang L, Sun D. Study on Mechanical and Acoustic Emission Characteristics of Backfill–Rock Instability under Different Stress Conditions. Sensors. 2024; 24(13):4112. https://0-doi-org.brum.beds.ac.uk/10.3390/s24134112

Chicago/Turabian Style

Dong, Longjun, Mingchun Yan, Yongchao Chen, Longbin Yang, and Daoyuan Sun. 2024. "Study on Mechanical and Acoustic Emission Characteristics of Backfill–Rock Instability under Different Stress Conditions" Sensors 24, no. 13: 4112. https://0-doi-org.brum.beds.ac.uk/10.3390/s24134112

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