Numerical Simulation on Effect of Lateral Pressure Coefficient on Stress Distribution around Circular Roadway

Zhe Zhang; Yan Feng Feng; Qing Li; Qing Lei Yu

doi:10.4028/www.scientific.net/AMR.197-198.1700

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 197-198Numerical Simulation on Effect of Lateral Pressure...

Numerical Simulation on Effect of Lateral Pressure Coefficient on Stress Distribution around Circular Roadway

Abstract:

Based on the heterogeneity of rock, by using the RFPA^2D, influene of the horizontal in-situ stresses on the distributions of plastic zones is discussed. The deformation and nonlinear gradual failure characteristics of circular roadway in deep rock mass as well as the displacement and the stress variation of the key position in the periphery of the roadway were analyzed, When λ>1, the plastic area was large-scale, but deflection more little , when λ<1, the plastic area was little-scale, but deflection increase. The study indicates that the stress concentration occurs in the periphery of the roadway after evacuation and plastic deformation zone engenders under the persisting stress of the surrounding rock, then the cracks appears and expands continuously, the broken rock zone appears at last and the intensity of the stress concentration decreases as well as the stress field shifts beyond.

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Periodical:

Advanced Materials Research (Volumes 197-198)

Pages:

1700-1703

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.197-198.1700

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Online since:

February 2011

Authors:

Zhe Zhang, Yan Feng Feng, Qing Li, Qing Lei Yu

Keywords:

Circular Aperture, In Situ Stress, Numerical Simulation, Rock Broken Zone

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