Discussions on Zonal Disintegration around Tunnel in Deep Rock Mass

Abstract:

Questions related to zonal disintegration such as difference between results from laboratory test and field monitoring test, as well as the effect of multi-axial stress level on zonal disintegration were discussed through numerical modeling by using a 3D numerical code called RFPA3D. Results show that the much smaller fracture spacing captured by laboratory test on zonal disintegration is due to the heterogeneity extent of the tested material. Zonal disintegration is an inherent character of heterogeneous rock mass, the more the heterogeneous the rock is, the larger the spacing between the adjacent fractures will be. The configuration of zonal disintegration is influenced by combination of stress level in three directions. Intact fracture rings can not be formed unless a nearly hydrostatic stress state exists in directions perpendicular to tunnel axis.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 2285-2289
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.2285
• Online since: November 2012
• Authors: Peng Jia, Tian Hong Yang, Chun Ming Zhang
• Keywords: Deep Rock Mass, Heterogeneity, Numerical Simulation, Residual Strength, Zonal Disintegration

References

[1] M. V.Kurlenya, V. N.Oparin and A. A. Eremenko: Journal of Mining Science. Vol. 2 (1993), P. 6-33

[2] M. V. Kurlenya, V. N.Oparin: Journal of Mining Science. Vol.35 (1999), P. 216–230

[3] V. N.Oparin, V. F. Yushkin and A. A. Akinin et al. : Journal of Mining Science. Vol. 5 (1998) P. 578-580

[4] S.C Li, H. P Wang, and Q. H Qian et al.: Chinese Journal of Rock Mechanics and Engineering. Vol. 27 (2008), P. 1545-1553 (in Chinese)

[5] M. A.Guzev, A. A. Paroshin: Journal of Applied Mechanics and Technical Physics. Vol. 42 (2001), P.131–139

DOI: 10.1023/a:1018877015940

[6] V. N. Reva: Journal of Mining Science: Vol. 38 (2002), P.31–34

[7] X. P. Zhou, G. Chen and Q.H. Qian: Theoretical and Applied Fracture Mechanics.Vol.57 (2012),P. 49-54

[8] J. C. Gu, L. Y. Gu, and A.M. Chen et al.: Chinese Journal of Rock Mechanics and Engineering. Vol. 27 (2008), P. 433-438 (in Chinese)

[9] Q. Y. Zhang, X, G. Chen and B. Lin et al.: Chinese Journal of Rock Mechanics and Engineering. Vol.28 (2009), P. 1758-1766 (in Chinese)

[10] H. Q. Zhang, Y. N. He and L. J. Han: Journal of University of Science and Technology Beijing. Vol. 33 (2011), P. 800-805 (in Chinese)

[11] X. B. Wang, Y.S. Pan et al : Journal of Liaoning Technical University. Vol.31(2012), P.1-7 (in Chinese)