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The rockburst disaster triggered by the nonlinear large-deformation characteristics of deep rock masses has been a worldwide problem in geotechnical engineering, severely constraining construction progress and safety in engineering projects. Therefore, it is imperative to intensify in-depth research on rockburst prevention measures. Based on the principle of steel pipe compressive deformation, a novel steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt was proposed, which can provide a high constant resistance while accommodating a substantial amount of deformation. Building on previous research, the impact resistance of the steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt was investigated through drop hammer impact tests. The test results indicate that: during the impact process, the working resistance of the steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt remains stable within the range of 150 kN to 180 kN, demonstrating notable constant-resistance characteristics; the bolt absorbs a significant amount of energy with high efficiency, capable of absorbing up to 53 kJ of impact energy in a single instance; throughout the impact, the compression rate of the specimen only decreased by 0.54% to 1.43%, indicating relatively stable deformation. The steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt exhibits excellent impact resistance, providing robust technical support for the prevention and control of rockburst disasters during underground engineering construction. © 2024 Biodiversity Research Center Academia Sinica. All rights reserved.
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Rock and Soil Mechanics
ISSN: 1000-7598
Year: 2024
Issue: 11
Volume: 45
Page: 3355-3365 and 3377
1 . 5 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 3
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