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Acta Mechanica Solida Sinica

, Volume 28, Issue 6, pp 722–734 | Cite as

The Effects of Three-Dimensional Penny-Shaped Cracks on Zonal Disintegration of the Surrounding Rock Masses Around a Deep Circular Tunnel

  • Xiaoping Zhou
  • Qihu Qian
  • Hanfei Song
Article

Abstract

In this study, it was assumed that three-dimensional penny-shaped cracks existed in deep rock masses. A new non-Euclidean model was established, in which the effects of penny-shaped cracks and axial in-situ stress on zonal disintegration of deep rock masses were taken into account. Based on the non-Euclidean model, the stress intensity factors at tips of the penny-shaped cracks were determined. The strain energy density factor was applied to investigate the occurrence of fractured zones. It was observed from the numerical results that the magnitude and location of fractured zones were sensitive to micro- and macro-mechanical parameters, as well as the value of in-situ stress. The numerical results were in good agreement with the experimental data.

Key Words

deep rock masses containing penny-shaped cracks the non-Euclidean model axial in-situ stress fractured zones zonal disintegration phenomenon deep circular tunnel 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2015

Authors and Affiliations

  1. 1.School of Civil EngineeringChongqing UniversityChongqingChina
  2. 2.State Key Laboratory of Coal Mine Disaster Dynamics and ControlChongqing UniversityChongqingChina
  3. 3.Engineering Institute of National Defense EngineeringPLA University of Science and TechnologyNanjingChina
  4. 4.State Key Laboratory of Disaster Prevention & Mitigation of Explosion & ImpactPLA University of Science and TechnologyNanjingChina

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