IDEAS home Printed from https://ideas.repec.org/a/gam/jmathe/v10y2022i21p4082-d961034.html
   My bibliography  Save this article

Energy Dissipation of Rock with Different Parallel Flaw Inclinations under Dynamic and Static Combined Loading

Author

Listed:
  • Bing Dai

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China)

  • Guifeng Zhao

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China)

  • Lei Zhang

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China)

  • Yong Liu

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China)

  • Zhijun Zhang

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China)

  • Xinyao Luo

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    School of Resources and Safety Engineering, Central South University, Changsha 410000, China)

  • Ying Chen

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China)

Abstract

Deep surrounding rocks are highly statically stressed before mining (excavating) and will inevitably experience disturbances from unloading, mining, stress adjustment or their combinations during mechanical or blasting excavation, which actually suffer from a typical coupled static-dynamic stress. A split Hopkinson pressure bar was used to carry out dynamic-static loading test on rock specimens with different fracture angles. The results show that the change law of energy utilization efficiency is similar to the energy absorption rate that they increase first and then decrease with the increasing of axial pressure. The elastic energy of specimens would also increase first and then decrease with the increasing of axial pressure, while the plastic energy generally decrease overall. Both the energy utilization efficiency and energy absorption rate increase with the growth of dynamic compressive strength under impact loading, which indicate that the energy dissipation exhibits a positive with the dynamic strength. The energy absorption density and energy utilization efficiency gradually increase linearly with the increasing of the average strain rate, while the relationship between energy utilization efficiency and incident energy basically follows the exponential function increasing law. The rock burst of pre-flawed rock is related to the static load level under dynamic-static loading, it occurs obviously under the action of medium energy when the axial pressure is high. Based on the energy dissipation theory, the damage variable model was further established, the damage variable can reasonably describe the damage evolution of crack granite under dynamic-static loading.

Suggested Citation

  • Bing Dai & Guifeng Zhao & Lei Zhang & Yong Liu & Zhijun Zhang & Xinyao Luo & Ying Chen, 2022. "Energy Dissipation of Rock with Different Parallel Flaw Inclinations under Dynamic and Static Combined Loading," Mathematics, MDPI, vol. 10(21), pages 1-22, November.
  • Handle: RePEc:gam:jmathe:v:10:y:2022:i:21:p:4082-:d:961034
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2227-7390/10/21/4082/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/2227-7390/10/21/4082/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Ying Chen & Shirui Chen & Zhengyu Wu & Bing Dai & Longhua Xv & Guicai Wu, 2022. "Optimization of Genetic Algorithm through Use of Back Propagation Neural Network in Forecasting Smooth Wall Blasting Parameters," Mathematics, MDPI, vol. 10(8), pages 1-21, April.
    2. Ying Chen & Qi Da & Weizhang Liang & Peng Xiao & Bing Dai & Guoyan Zhao, 2022. "Bagged Ensemble of Gaussian Process Classifiers for Assessing Rockburst Damage Potential with an Imbalanced Dataset," Mathematics, MDPI, vol. 10(18), pages 1-22, September.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Yuanmin Wang & Yunqiang Wang & Song Luo & Hao Liu & Guansheng Yi & Kang Peng, 2023. "Influence of the Crack Angle on the Deformation and Failure Characteristics of Sandstone under Stepped Cyclic Uniaxial Compression with a Constant Lower Limit," Mathematics, MDPI, vol. 11(9), pages 1-19, May.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Shaofeng Wang & Xin Cai & Jian Zhou & Zhengyang Song & Xiaofeng Li, 2022. "Analytical, Numerical and Big-Data-Based Methods in Deep Rock Mechanics," Mathematics, MDPI, vol. 10(18), pages 1-5, September.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jmathe:v:10:y:2022:i:21:p:4082-:d:961034. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.