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| Study on Fracture Deformation Characteristics of Rock Mass with Different Anchoring Parameters |
| Gao Shuai, Xu Peidong, Hu Jiaqi, Zhang Shun, Xu Zhenming |
| School of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, China |
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Abstract To explore the control effect of bolt on tensile - shear composite fracture of surrounding rock in deep roadway under different anchoring parameters, the unilateral free-face loading test was carried out on the anchor solid specimens with different anchorage parameters under the quasi-plane strain condition, and the tensile-shear fracture evolution and deformation characteristics of anchor solid under different anchorage spacing and anchorage angle were compared and analyzed. The results showed that both horizontal anchorage and inclined anchorage could effectively improve the deformation resistance of the specimen, and had a significant inhibitory effect on the deformation and failure of the specimen. Horizontal anchorage could effectively inhibit the occurrence of tensile fracture of specimens, and the inhibitory effect gradually increased with the decrease of bolt spacing within a certain range. Inclined anchorage had more obvious inhibitory effect on shear failure of specimens, and there was an optimal anchorage angle in the process of inclined anchorage. This experiment provided a theoretical reference for further research.
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