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Damage Evolution Laws of Low-Strength Molybdenum Ore Under Uniaxial Compression

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Abstract

To study the damage evolution laws and damage constitutive model of low-strength molybdenum ores, uniaxial compression tests on low-strength molybdenum ores were conducted in combination with acoustic emission technology. The damage variables were defined based on the accumulative ringing counts, and the pre-peak correction factor was introduced to derive a modified damage constitutive model for low-strength molybdenum ores under uniaxial compression, and analyze their acoustic emission characteristics and damage evolution laws. The results showed that the accumulative ringing count and accumulative energy had a sharp increase before the stress peak of low-strength molybdenum ores, which can be used as basis for judging that low-strength molybdenum ores are about to enter the failure stage. The damage evolution process of low-strength molybdenum ores can reasonably reflect their deformation and failure characteristics in different fracture evolution stages. The stress–strain curve was up-concave, and the pre-peak correction factor in the form of logarithmic function is proposed to establish a more reasonable modified damage constitutive model based on accumulative ringing counts under uniaxial compression. The theoretical curve can well simulate the deformation process of low-strength molybdenum ores before the peak stress, and the obtained theoretical curve is basically consistent with the text curve. The results can provide a reference for the stability evaluation and control of the surrounding rock of low-strength molybdenum mines.

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Acknowledgments

The study was supported by the National Natural Science Foundation (Grant No. 51764013), the Training Plan for Academic and Technical Leaders of Major Disciplines of Jiangxi Province (Grant No. 20204BCJ22005), the China Postdoctoral Science Foundation funded project (Grant No. 2019M652277), and the Natural Science Youth Foundation Key Projects of Jiangxi Province of China (Grant No. 20192ACBL21014).

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Authors and Affiliations

  1. School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, Jiangxi, China

    Jian Yang, Kang Zhao, Yufeng Song, Qing Wang & Kangqi Zhao

  2. Solids Waste and Chemicals Management Center, Ministry of Ecology and Environment, Beijing, 100029, China

    Kang Zhao

  3. Lingbao Jinyuan Mining Company Limited, Lingbao, 472500, Henan, China

    Kang Zhao & Yongbo Ji

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  1. Jian Yang
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  4. Qing Wang
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Correspondence to Kang Zhao.

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No conflict of interest exists in the submission of this manuscript, and the manuscript has been approved by all authors for publication. I would like to declare on behalf of my coauthors that the work described is original research that has not been published previously and is not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the enclosed manuscript.

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Yang, J., Zhao, K., Song, Y. et al. Damage Evolution Laws of Low-Strength Molybdenum Ore Under Uniaxial Compression. Nat Resour Res 31, 1189–1202 (2022). https://doi.org/10.1007/s11053-022-10057-4

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  • DOI: https://doi.org/10.1007/s11053-022-10057-4

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