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Failure prediction and microcracks development based on acoustic emission and energy evolution for different rocks treated with freeze–thaw weathering

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Abstract

Freeze–thaw weathering pointedly deteriorates rocks’ strength and plays a significant role in rockmass instability in cold regions. Therefore, acoustic emission (AE) signals and energy evolution during uniaxial compressive loading were used to predict failure and estimate the microcracks evolution of sandstone, marble, and granite under freeze–thaw weathering. Moreover, the AE energy mutation rate (AEEMR) was evaluated from AE signals to identify the pre-failure peaks of rock deformation. The AE signals, i.e., AE energy, have successively traced the distinct stage characteristics during the loading process. The AEEMR curves consecutively enhanced the pre-failure peaks of AE energy curves. Further, the ratios of dissipation to the total energy (RDT), elastic to dissipation energy (RED), and energy dissipation rate (EDR) were adopted to predict the violent failure of different rocks. The results demonstrated that the precursory information of RDT and RED was more manifest than that of EDR curves. The RDT and RED gave precursory points earlier than EDR. It was also observed that the freeze–thaw weathering affected the failure and precursory time of rocks. Furthermore, the microcracks evolution was assessed using the (average frequency) AF and (the gradient of the waveform rise) RA values distribution line and 2D Kernel density estimation (KDE) map. The freeze–thaw weathering barely influenced the cracks’ transformation from tensile to shear, but the tensile cracks were further espoused notably. The outcomes of this research work will be beneficial in understanding the failure mechanism and prediction of different rocks under extreme frigid environments.

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Funding

This work is supported by the National Key Research and Development Program of China (2022YFC2903901), the National Natural Science Foundation of China (52334003, 52274249, 52104111), the Xiaohe Sci-Tech Talents Special Funding under Hunan Provincial Sci-Tech Talents Sponsorship Program (2023TJ-X80) and the Fundamental Research Funds for the Central Universities of Central South University (2023ZZTS0713). The authors are very grateful to the financial contribution and convey their appreciation for supporting this basic research.

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Correspondence to Xin Cai.

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Ullah, B., Zhou, Z., Cai, X. et al. Failure prediction and microcracks development based on acoustic emission and energy evolution for different rocks treated with freeze–thaw weathering. Bull Eng Geol Environ 82, 471 (2023). https://doi.org/10.1007/s10064-023-03485-w

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  • DOI: https://doi.org/10.1007/s10064-023-03485-w

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