Abstract
Study on the change laws of surrounding rock stress field is helpful to solve the problem of roadway destruction and deformation. The principal stress trajectories diagram is a method of visualizing the surrounding rock stress field. This method analyzes the stress field topology based on the distribution of the principal stress trajectories and the locations and types of degenerate points. Taking the lateral pressure coefficient as an independent variable, through FLAC simulation, the principal stress vector cross-line diagram of the surrounding rock stress field with different lateral pressure coefficients is obtained. Then, the principal stress trajectories diagram is depicted based on the cross-line diagram. Based on the principal stress trajectories diagram, the distribution characteristics of principal stress trajectories can be summarized, and then, some suggestions to maintain the stability of surrounding rock can be summarized from these distribution characteristics. In a practical engineering case, the deformation characteristics of the roadway before and after support are analyzed by FLAC simulation. The analysis results are used to verify the correctness of the visualization method and suggestions. Research shows that the principal stress trajectories can effectively display the topology of the stress field. The distribution characteristics of principal stress trajectories have a clear guiding role in judging the stability of surrounding rock, and the suggestions of maintaining the stability of surrounding rock are applicable to the actual support situation.
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financially supported by the state key research development program of china, 2018YFC0808303
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The manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously. All the authors listed have approved the manuscript that is enclosed. We declare that we have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Hongwei, J., Shiyin, H., Qiao, X. et al. Study on Stress Field Topology Characterization and Stability of Roadway Surrounding Rock. Arab J Geosci 15, 484 (2022). https://doi.org/10.1007/s12517-021-09362-8
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DOI: https://doi.org/10.1007/s12517-021-09362-8