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Fractal dimension and energy-damage evolution of deep-bedded sandstone under one-dimensional dynamic and static combined loading

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Geomechanics and Geophysics for Geo-Energy and Geo-Resources Aims and scope Submit manuscript

Abstract

A one-dimensional (1-D) SHPB was used to conduct dynamic tests on deep-bedded sandstone. The fractal dimension, energy evolution, and distribution curve of deep-bedded sandstone with diverse angles and impact pressures were obtained. In addition, the damage factors were defined and the damage evolution mechanism of deep-bedded sandstone was analyzed. The results show that (1) under low-impact pressure (0.05 MPa), the peak point elastic energy of deep-bedded sandstone occupies the main part of the total energy, while under high-impact pressure (0.4 MPa), the peak point dissipation energy occupies the main part of the total energy. (2) With increasing impact pressure, the energy accumulation rate of deep-bedded sandstone initially increases and subsequently becomes stable. The bedding effect is substantial under low pressure and disappears gradually under high pressure. (3) Under low-impact pressure (0.05 MPa), the damage factor evolution law of 0°, 30°, and 90° deep-bedded sandstone is stable at first and then increases rapidly. Under high-impact pressure (0.4 MPa), the damage factor of deep-bedded sandstone shows an apparent S-shaped curve.

Article highlights

  • The fractal dimension of deep-bedded sandstone under different angles and impact pressures was studied.

  • The energy-distribution characteristics of deep-bedded sandstone under different angles and impact pressures were studied.

  • The damage mechanism of deep-bedded sandstone under different angles and impact pressures was studied.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant Nos. 52034009, 51974319) and the Yue Qi Distinguished Scholar Project (Grant No. 2020JCB01).

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Authors and Affiliations

  1. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Wenbing Fan, Junwen Zhang, Xukai Dong, Yan Zhang & Yang Yang

  2. Beijing Key Laboratory of Energy Precision Mining, China University of Mining and Technology, Beijing, 100083, China

    Junwen Zhang

  3. Demonstration Center for Safe Coal Mining and Geological Security, China University of Mining and Technology (Beijing) National Experimental Teaching, Beijing, 100083, China

    Junwen Zhang

  4. China Coal Industry Development Research Center, Beijing, 100013, China

    Weigang Zeng

  5. Priority Research Centre for Geotechnical Science and Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia

    Shanyong Wang

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  1. Wenbing Fan
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  4. Yan Zhang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by [WF], [JZ], [XD], [YY] [WZ], [YZ] and [SW]. The first draft of the manuscript was written by [WF] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Junwen Zhang.

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Fan, W., Zhang, J., Dong, X. et al. Fractal dimension and energy-damage evolution of deep-bedded sandstone under one-dimensional dynamic and static combined loading. Geomech. Geophys. Geo-energ. Geo-resour. 8, 177 (2022). https://doi.org/10.1007/s40948-022-00487-y

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  • DOI: https://doi.org/10.1007/s40948-022-00487-y

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