The analytical solution for prestressed bolt (cable) support in circular roadways

Lizhen Shen

doi:10.54097/x6xq3r69

Authors

Lizhen Shen

DOI:

https://doi.org/10.54097/x6xq3r69

Keywords:

Prestressed bolt (cable); RAS; analytical solution; circular roadways.

Abstract

Prestressed bolt (cable) play a significant role in the support of deep-buried roadways, effectively reducing the displacement and stress concentration of the surrounding rock, thereby enhancing the overall stability of the roadway. To further understand the mechanism of the rock-anchor system (RAS), this paper derives an analytical solution for circular roadways supported by prestressed bolt (cable) based on the theory of elasticity and verifies the solution using finite element methods. The results show a high degree of agreement between the analytical solution and the numerical results, confirming the accuracy and reliability of the model. Moreover, further analysis reveals that proper prestress levels and bolt (cable) spacing are critical in optimizing the stress distribution of the surrounding rock and reducing deformation. This study provides important theoretical guidance for the optimal application of prestressed support technologies.

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