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Study on Evolution Mechanism of Structure-Type Rockburst: Insights from Discrete Element Modeling

Author

Listed:
  • Chenxi Zhang

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Diyuan Li

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Shunchuan Wu

    (School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Long Chen

    (School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China)

  • Jun Peng

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

Abstract

Taking the “11.28” rockburst occurred in the Jinping II Hydropower Station as the engineering background, the evolution mechanism of structure-type rockburst was studied in detail based on the particle flow code. The results indicate that the failure mechanism of structure-type rockburst includes a tensile fracture induced by tangential compressive stress and a shear fracture caused by shear stress due to overburdened loadings and shear slip on the structural plane. In addition, it is found that the differences between structure-type rockburst and strainburst mainly include (a) the distribution of the local concentrated stress zone after excavation, (b) the evolution mechanism, and (c) the failure locations. Finally, the influence of four factors on the structure-type rockburst are explored. The results show that (1) when the friction coefficient is greater than 0.5, the effect of structural plane is weakened, and the rock near excavation tends to be intact, the structural-type rockburst intensity decreases; (2) the dissipated and radiated energy in structural-type rockburst reduces with rockmass heterogeneity m ; (3) the lateral pressure coefficient has a significant effect on the intensity of deep rock failure, specifically in the form of the rapid growth in dissipative energy; (4) and the structural-type rockburst is more pronounced at a structural plane length near 90 mm.

Suggested Citation

  • Chenxi Zhang & Diyuan Li & Shunchuan Wu & Long Chen & Jun Peng, 2021. "Study on Evolution Mechanism of Structure-Type Rockburst: Insights from Discrete Element Modeling," Sustainability, MDPI, vol. 13(14), pages 1-26, July.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:14:p:8036-:d:596839
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    References listed on IDEAS

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    1. Guangliang Feng & Guoqing Xia & Bingrui Chen & Yaxun Xiao & Ruichen Zhou, 2019. "A Method for Rockburst Prediction in the Deep Tunnels of Hydropower Stations Based on the Monitored Microseismicity and an Optimized Probabilistic Neural Network Model," Sustainability, MDPI, vol. 11(11), pages 1-17, June.
    2. Ting Jiang & Zhenzhong Shen & Yang Liu & Yiyang Hou, 2018. "Carbon Footprint Assessment of Four Normal Size Hydropower Stations in China," Sustainability, MDPI, vol. 10(6), pages 1-14, June.
    3. Weiyao Tang & Zongmin Li & Yan Tu, 2018. "Sustainability Risk Evaluation for Large-Scale Hydropower Projects with Hybrid Uncertainty," Sustainability, MDPI, vol. 10(1), pages 1-19, January.
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    Cited by:

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