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Volume 36 Issue 2
Apr 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(2): 025202.
ZHANG Hengyuan, FAN Junqi, GUO Jiaqi, SHI Xiaoyan, SUN Feiyue. Rockburst Tendency for Deep Underground Engineering Based on Multi-Parameters Criterion[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 025202. doi: 10.11858/gywlxb.20210857
Citation: ZHANG Hengyuan, FAN Junqi, GUO Jiaqi, SHI Xiaoyan, SUN Feiyue. Rockburst Tendency for Deep Underground Engineering Based on Multi-Parameters Criterion[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 025202. doi: 10.11858/gywlxb.20210857
shu

Rockburst Tendency for Deep Underground Engineering Based on Multi-Parameters Criterion

doi: 10.11858/gywlxb.20210857
  • 1.

    College of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

  • 2.

    Research Institute for National Defense Engineering, Academy of Military Science PLA China, Luoyang 471023, Henan, China

  • 3.

    Key Laboratory of Henan Province for Underground Engineering and Disaster Prevention, Jiaozuo 454000, Henan, China

  • Received Date: 01 Aug 2021
  • Rev Recd Date: 22 Aug 2021
  • Accepted Date: 22 Aug 2021
    Abstract
  • According to the energy conversion mechanism of rock failure and the overall failure criterion of element, a multi-parameter rockburst criterion considering the releasable strain energy accumulated in rock, the critical value of surface energy required for rock failure, and the brittleness coefficient is proposed. Based on the numerical simulation platform of the three-dimensional discrete element code (3DEC), the above rockburst criterion is developed, and the response characteristics in deep underground engineering, including the principal stresses difference, the elastic strain energy density and the rockburst judgement index, are studied under excavation disturbance in different buried depths and different lateral pressure coefficients. Some conclusions are obtained from the simulations: the larger values of the principal stress difference of the surrounding rock are mainly concentrated at the vault of the tunnel, and the larger values of the elastic strain energy density are mainly concentrated at the vault and arch foot of the tunnel; the distribution range and the values of the rockburst criterion index increase with the augmentation of the buried depth and the lateral pressure coefficient. In order to verify the proposed rockburst criterion and the numerical calculation method, the rockburst disaster in 4# headrace tunnel of Jinping Ⅱ Hydropower Station is simulated and analysed. It is found that the intensity and location of rockburst disaster simulated by the above method are consistent with the actual situation, which verifies the rationality and applicability of the method established in this paper. The research results provide a theoretical support and a technical guidance for effective prediction, prevention, and control of rockburst disasters in deep underground engineering.

     

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