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Research on the Energy Constitutive Model and Static Load Anchorage Characteristics of a Novel Mace-Type Energy Release Bolt

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Abstract

Based on the shortcomings of traditional bolts in the process of supporting surrounding rock, the structural composition and working principle of new bolts have been studied in detail. The working principle of the new bolt is divided into the elastic deformation stage and slip stage, and the energy constitutive equation of the corresponding stage is analysed. Then, Abaqus software is used to numerically simulate the working state of the bolt under static tension. With increasing drawing load, the maximum axial stress of the bolt and the von Mises stress of the surrounding rock first increased and then tended to stabilize, and the maximum axial displacement of the bolt gradually increased. The axial stress of the bolt was concentrated at the damping module, and the stress was mainly concentrated at the front damping module. The deformation of the bolt is mainly concentrated in the damping module of the first section, and the deformation of the bolt decreases rapidly with increasing anchoring depth. On-site pull-out tests confirmed that the drawing force of the new bolt increased by 128% and 24% compared with that of the pipe bolt and the left handed without longitudinal rebar bolt, respectively. The novel bolt has the characteristics of high strength and large displacement, which allows it to support the surrounding rock well and has good application prospects.

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Data available on request from the authors.

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Acknowledgements

Great appreciation goes to the editorial board and the reviewers of this paper.

Funding

Key project of Natural Science research in Universities of Anhui Province (KJ2021A0455), the State Key Laboratory of Safety and Health for Metal Mines (2021-JSKSSYS-02), Key Project of National Natural Science Fund (52130403) and NSFC-Shandong Joint fund (Grant No. U1806208).

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All the authors contributed to publishing this paper. Huaibin Li and Yunmin Wang conceived and designed the research and wrote the original manuscript. Huaibin Li and Weipeng Pan performed the field test and theoretical analysis. Xingdong Zhao presented the numerical simulation. Xinzhu Hua and Bibo Dai participated in the data analysis and manuscript modification. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Weipeng Pan.

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Li, H., Pan, W., Wang, Y. et al. Research on the Energy Constitutive Model and Static Load Anchorage Characteristics of a Novel Mace-Type Energy Release Bolt. Geotech Geol Eng (2024). https://doi.org/10.1007/s10706-024-02790-9

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