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Experimental Study on Mechanical Properties and Failure Mechanism of Damaged Sandstone

Author

Listed:
  • Yongqiang Zhao

    (National Energy Group, Beijing Low-Carbon Clean Energy Research Institute, State Key Laboratory of Coal Mining Water Resources Protection and Utilization, Beijing 100011, China)

  • Quansheng Li

    (National Energy Group, Beijing Low-Carbon Clean Energy Research Institute, State Key Laboratory of Coal Mining Water Resources Protection and Utilization, Beijing 100011, China
    Shenhua Energy Company Limited, Beijing 100011, China)

  • Kai Zhang

    (National Energy Group, Beijing Low-Carbon Clean Energy Research Institute, State Key Laboratory of Coal Mining Water Resources Protection and Utilization, Beijing 100011, China
    National Energy Investment Group Co., Beijing 100011, China)

  • Yingming Yang

    (National Energy Group, Beijing Low-Carbon Clean Energy Research Institute, State Key Laboratory of Coal Mining Water Resources Protection and Utilization, Beijing 100011, China)

  • Dongxiao Zhang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Weilong Zhang

    (Shendong Coal Group Co., Ltd., Shenmu 719315, China)

  • Xiaojun Ding

    (Shendong Coal Group Co., Ltd., Shenmu 719315, China)

Abstract

Solid materials such as rocks can contain primary defects, and internal defects are activated in the event of mining disturbance, which causes rock damage and destruction. Therefore, it is of great significance for rock engineering to study the mechanical properties and failure mechanism of damaged rock. In this study, damaged prefabricated crack sandstone specimens were prepared with the cyclic loading-unloading test, and the uniaxial loading test was carried out with damaged specimens. The evolution law of peak strength, elastic modulus, and peak strain of specimens with different damage degrees was studied, the quantitative relationship between the P-wave velocity and the damage degree was obtained, and the acoustic emission (AE) count and energy evolution characteristics of specimens with different damage degrees were analyzed. The energy evolution law of damaged specimens was revealed, and with the increase in damage degree, the elastic energy stored in the specimens can be converted into crack propagation more quickly, and the dissipated energy density increases rapidly, resulting in complete rock failure. The research results can provide theoretical support for the stability analysis and control of underground engineering rock mass in the event of multiple disturbances.

Suggested Citation

  • Yongqiang Zhao & Quansheng Li & Kai Zhang & Yingming Yang & Dongxiao Zhang & Weilong Zhang & Xiaojun Ding, 2022. "Experimental Study on Mechanical Properties and Failure Mechanism of Damaged Sandstone," Sustainability, MDPI, vol. 15(1), pages 1-19, December.
    • Handle: RePEc:gam:jsusta:v:15:y:2022:i:1:p:555-:d:1018320
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    References listed on IDEAS

    as
    1. Chun Wang & Shuai-fei Zhan & Mei-zhi Xie & Cheng Wang & Lu-ping Cheng & Zu-qiang Xiong, 2020. "Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress," Complexity, Hindawi, vol. 2020, pages 1-15, May.
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    Cited by:

    1. Liu, Quanlong & Wang, Jingzhi & Qiu, Zunxiang, 2023. "Data as evidence: Research on the influencing factors and mechanisms of coal mine safety supervision effect in China," Resources Policy, Elsevier, vol. 81(C).

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