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Experimental exploration of damage propagation in rocks using acoustic emission

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Abstract

The formation of geological disasters, such as earthquakes and rock bursts, is a process similar to avalanches. These sudden disasters are closely related to a series of discontinuous cracks. In this study, the relationship between the damage process and the jerk phenomenon (sharp change in stress during loading) of rocks was revealed by evaluating the acoustic emission (AE) characteristics of sandstone under triaxial compression. The results show that most of the AE signals during the loading process were low-energy tensile signals. The aggregation and transfer of these low-energy signals could induce jerks. The proportion of high-energy shear signals was very low; however, the high-energy shear signals could induce the jerk phenomenon. Sandstone failure is a process of local failure and stress concentration transfer within the rock. The forms of gather and transfer are different at each loading step. Overall, the transfer law indicates that the damage area disperses to the edge of the sample and then concentrates to the center. The stress transfer and local damage of rocks are accompanied by a series of jerks. This study provides a better understanding of the rock failure process and provides theoretical support for the prevention and early warning of geological disasters.

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Data availability

The datasets are available online (https://1drv.ms/u/s!Aj0ejDIhP3TKiuJRKnJ0JJL9fAb06Q?e=g1RxQM).

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Acknowledgements

We would like to thank the editor and the anonymous reviewers for their constructive comments and suggestions.

Funding

This study was financially supported by the Opening Fund of Key Laboratory of Continental Shale Accumulation and Development (North-east Petroleum University), Ministry of Education; the National Natural Science Foundation of China (Grant Nos. 42004036, 52074088); and the Chongqing Science and Technology Commission Projects (Grant Nos. cstc2018jcyj-yszx0005 and cstc2020yszx-jcyjX0008).

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Contributions

Hui Zhang, Zhizhang Wang, and Zhenlong Song contributed to the study conception and design. Zhenlong Song and Zhizhang Wang analyzed the calculation and test data. Hui Zhang wrote the first draft. Material preparation and data collection were performed by Wanchun Zhao, Tingting Wang, and Dong Wang. All authors commented on previous versions of the manuscript. Zhenlong Song and Wanchun Zhao revised the paper and gave final approval of the version to be submitted.

Corresponding author

Correspondence to Zhenlong Song.

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The authors declare no competing interests.

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Zhao, W., Wang, Z., Song, Z. et al. Experimental exploration of damage propagation in rocks using acoustic emission. Bull Eng Geol Environ 80, 6065–6075 (2021). https://doi.org/10.1007/s10064-021-02325-z

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  • DOI: https://doi.org/10.1007/s10064-021-02325-z

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