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Long-term mechanical behavior and characteristics of cemented tailings backfill through impact loading

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Abstract

Cemented tailings backfill (CTB) structures are important components of underground mine stopes. It is important to investigate the characteristics and dynamic behavior of CTB materials because they are susceptible to disturbance by dynamic loading, such as excavation and blasting. In this study, the authors present the results of a series of Split-Hopkinson pressure bar (SHPB) single and cyclic impact loading tests on CTB specimens to investigate the long-term dynamic mechanical properties of CTB. The stress-strain relationship, dynamic strength, and dynamic failure characteristics of CTB specimens are analyzed and discussed to provide valuable conclusions that will improve our knowledge of CTB long-term mechanical behavior and characteristics. For instance, the dynamic peak stress under cyclic impact loading is approximately twice that under single impact loading, and the CTB specimens are less prone to fracture when cyclically loaded. These findings and conclusions can provide a new set of references for the stability analysis of CTB materials and help guide mine designers in reducing the amount of binding agents and the associated mining cost.

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Acknowledgements

This work was financially supported by the National Key R&D Program of China (No. 2017YFC0602900), the Fundamental Research Funds for the Central Universities (No. FRF-TP-17-029A2), and the Open Fund of Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China, No. ustbmslab201803).

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Authors and Affiliations

  1. Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China), University of Science and Technology Bei**g, Bei**g, 100083, China

    Yu-ye Tan, Yu-cheng Zhou, Wei-dong Song & **ang Meng

  2. School of Civil and Resources Engineering, University of Science and Technology Bei**g, Bei**g, 100083, China

    Yu-ye Tan, Yu-cheng Zhou, Wei-dong Song & **ang Meng

  3. Norman B. Keevil Institute of Mining Engineering, Applied Science School, University of British Columbia, Vancouver, BC, Canada, V6T 1Z4

    Elmo Davide

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  1. Yu-ye Tan
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Correspondence to Elmo Davide.

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Tan, Yy., Davide, E., Zhou, Yc. et al. Long-term mechanical behavior and characteristics of cemented tailings backfill through impact loading. Int J Miner Metall Mater 27, 140–151 (2020). https://doi.org/10.1007/s12613-019-1878-6

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  • DOI: https://doi.org/10.1007/s12613-019-1878-6

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