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Non-euclidean continuum model of the zonal disintegration of surrounding rocks around a deep circular tunnel in a non-hydrostatic pressure state

  • Geomechanics
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Journal of Mining Science Aims and scope

Abstract

A non-Euclidean continuum model for the descriptions of the elastic stress-field distributions and fractured zones in the surrounding rock masses around the deep circular tunnels subjected to nonhydrostatic pressure are established. In the non-Euclidean continuum model, the elastic stress-field distribution of the deep surrounding rock induced by compatible deformation of non-fractured zones and incompatible deformation of fractured zones is determined. The wavy behavior of the stress components based on the non-Euclidean model are obviously different from that of the stress components which have extrema on the working contour and tend monotonically to the value of the in-situ stress at infinity in rock masses within the framework of the classical model. Mohr-Coulomb criterion is applied to research the occurrence of disintegration zones. Disintegration zones appear when the stresses in deep rock masses reach a certain critical value. It is found from the numerical results that the magnitude and site of fractured zones depend on the value of in-situ stress and non-Euclideanness parameters.

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, Chongqing, China

    Qihu Qian

  2. PLA University of Science and Technology, Nanjing, China

    Xiaoping Zhou

Authors
  1. Qihu Qian
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  2. Xiaoping Zhou
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 42–52, January–February, 2011.

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Qian, Q., Zhou, X. Non-euclidean continuum model of the zonal disintegration of surrounding rocks around a deep circular tunnel in a non-hydrostatic pressure state. J Min Sci 47, 37–46 (2011). https://doi.org/10.1134/S1062739147010059

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  • DOI: https://doi.org/10.1134/S1062739147010059

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