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Experimental Study on the Mechanical and Acoustic Characteristics of Cemented Backfill with Unclassified Tailings at Different Curing Ages under Uniaxial Compression

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  • Kui Zhao

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
    Key Laboratory of Mining Engineering of Jiangxi Province, Jiangxi University of Science and Technology, Ganzhou 341000, China
    Deep Vein Group Mine Intelligent Mining Technology Innovation Center of Ganzhou, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Wenhui Li

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Hui Ding

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Peng Zeng

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
    Key Laboratory of Mining Engineering of Jiangxi Province, Jiangxi University of Science and Technology, Ganzhou 341000, China
    Deep Vein Group Mine Intelligent Mining Technology Innovation Center of Ganzhou, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Weibin Xiang

    (Xinyu Iron & Steel Group Co., Ltd., Xinyu 338000, China)

  • Min Zhang

    (Mechanical and Electronic Engineering Department, Gannan University of Science and Technology, Ganzhou 341000, China)

  • Zhouchao Liu

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Yanda Li

    (College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)

Abstract

In order to study the influence of the cement–tailing ratio and curing age on the mechanical properties of cemented backfill with unclassified tailings and improve the accuracy of the backfill monitoring method, the mechanical characteristics of the failure process of cemented backfill with unclassified tailings at different curing ages were studied using the acoustic emission and infrasound method. The results show that the peak strength and modulus of elasticity of backfill are positively correlated with the curing age. During the failure process of cemented backfill with unclassified tailings, the acoustic emission ringing count shows a “stabilizing–rising–falling–rising” trend, and the infrasonic ringing count will have a “multiple peak” phenomenon. The ib value of the acoustic emission signal generally increases with the extension of the curing age. The ib value of the infrasonic signal generally has a negative correlation with the increase of the curing age. When the ib value of the acoustic emission and infrasonic wave all start to decline in a jumping manner, this indicates that the backfill is about to be damaged. The dominant frequency ratio of acoustic emission signals ( F AE ) is distributed between 0–4 during the failure process, and the total number of F AE shows the phenomenon of “first decreasing and then increasing” with the curing age. The dominant frequency ratio of infrasonic signals ( F s ) is distributed between 0–6. During the failure process of cemented backfill with unclassified tailings, the quantity ratio of class A and B of acoustic emission signals shows a gradually increasing trend, and the quantity ratio of class A and B of infrasonic signals shows a “decreasing–increasing–decreasing” trend, and the quantity ratio of class A and B of acoustic signals shows a sharp increase at the stage of entering the crack’s unstable growth stage.

Suggested Citation

  • Kui Zhao & Wenhui Li & Hui Ding & Peng Zeng & Weibin Xiang & Min Zhang & Zhouchao Liu & Yanda Li, 2023. "Experimental Study on the Mechanical and Acoustic Characteristics of Cemented Backfill with Unclassified Tailings at Different Curing Ages under Uniaxial Compression," Sustainability, MDPI, vol. 15(9), pages 1-19, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:9:p:7177-:d:1132724
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    References listed on IDEAS

    as
    1. Herui Zhang & Weihong Guo, 2022. "Acoustic Emission Waveform Characteristics of Red Sandstone Failure under Uniaxial Compression after Thermal Damage," Sustainability, MDPI, vol. 14(20), pages 1-12, October.
    2. Lihui Sun & Yaxin Long & Xing Li & Zhixin Jiang & Yu Fan & Zongze Wang & Xiangang Han, 2023. "Effect of Loading Rate on the Mechanical Properties of Weakly Cemented Sandstone," Sustainability, MDPI, vol. 15(3), pages 1-15, February.
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