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Stress and load-bearing structure analysis of the surrounding rock in a soft broken roadway

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A Correction to this article was published on 24 November 2020

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Abstract

After roadway excavation, the surrounding rock is the main bearing structure for the original stress and forms a supporting ring with the supporting structure. The automatic load-bearing ring is the main interactional structure between the surrounding rock and the supporting system. The rock mass strength, stress, and deformation characteristics were considered to establish the theoretical calculation model for the softened broken surrounding rocks. In the model, the strength, stress, and deformations were analyzed for the elastic-plastic softening and broken zones. The analytical solution was obtained for the stress field, displacement field, and plastic damage range of the surrounding rocks. Considering the postpeak strength softening, shearing dilatation effects, original rock stress, and supporting resistance, the roadway bearing structure was divided into a shallow bearing layer and a deep bearing layer. Moreover, the crucial bearing layer was vital to the bearing capacity and stability of the layer. The influence of the shallow bearing layer, deep bearing layer, and crucial bearing layer on controlling the deformation of the surrounding rock was also analyzed. Based on the evolution characteristics of the shallow and deep buried surrounding rock, the weaker the residual strength of the surrounding rock was, the thicker the shallow and deep buried surrounding rock; the thicker the shallow and deep buried layers were, the greater the surface displacement of the surrounding rock; the crucial bearing layer was farther away from the roadway, and the roadway surface displacement was great; the greater the supporting resistance was, the thinner the shallow and deep bearing layers; and the crucial bearing layer was closer to the roadway, and the roadway deformation control was effective. Furthermore, based on the specific calculation example, the influence of the residual stress and supporting measures on the evolution characteristics of shallow and deep layers and roadway deformation was analyzed in detail.

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Change history

  • 05 November 2020

    Springer Nature’s version of this paper was updated to present the correct Figures 1, 2 and 3.

  • 24 November 2020

    The original version of this paper was published with error. Figures 1, 2 and 3 images contained unconverted characters. Given in this article are the correct figures.

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Funding

This work is financially supported by the National Key Research and Development plan (2017YFC0603000), National Natural Science Foundation of China (No. 51374013, No. 51674008), Excellence Talent Training Program of High School (No. gxbjZD2016051), Innovation Team Construction Project of Anhui High School Research Platform, and Academic Research Activity Foundation for Academic and Technical Leaders and Reserve Candidates of Anhui Province (No. 2015H036)

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Authors and Affiliations

  1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, China

    Guangming Zhao, Chongyan Liu, Siming Kao & Xiang Cheng

  2. School of Civil Engineering and Architecture, Nanchang University, Nanchang, 330031, Jiangxi, China

    Xiaobo Zhang

Authors
  1. Guangming Zhao
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  2. Chongyan Liu
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  3. Siming Kao
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  4. Xiaobo Zhang
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  5. Xiang Cheng
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Correspondence to Chongyan Liu.

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The authors declare that they have no conflict of interest.

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Responsible Editor: Murat Karakus

The original online version of this article was revised: Figures 1, 2 and 3 images contained unconverted characters. Given in this article are the correct figures.

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Zhao, G., Liu, C., Kao, S. et al. Stress and load-bearing structure analysis of the surrounding rock in a soft broken roadway. Arab J Geosci 13, 1134 (2020). https://doi.org/10.1007/s12517-020-06126-8

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  • DOI: https://doi.org/10.1007/s12517-020-06126-8

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