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An Experimental Investigation into the Stress-Strain Characteristic under Static and Quasi-Static Loading for Partially Embedded Rock Bolts

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  • Krzysztof Skrzypkowski

    (Faculty of Mining and Geoengineering, AGH University of Science and Technology, Mickiewicza 30 av., 30-059 Kraków, Poland)

Abstract

This article deals with a static and quasi-static load using the maximum power of a hydraulic pump. Additionally, quasi-static coefficients for the partially embedded rock bolts were determined. The laboratory tests included 2.2 m long bolts, which were embedded segmentally on the lengths of 0.05 m, 0.3 m and 0.9 m and were tested. To fix the ribbed bolt rods in the steel cylinders, resin cartridges with a length of 0.45 m long were used. The main aim of the research was to determine the load-displacement characteristics. Knowing the bolt rod tensile mechanism, the points of failure in the material continuity were identified, on the basis of which stress-strain characteristics are made. Particular attention was paid to the definition of: tensile stress for the yield point (σ 1 ), maximum stress (σ 2 ), stress at failure (σ 3 ), strain in the elastic range (ε 1 ), strain for maximum stress (ε 2 ) and strain corresponding to the failure (ε 3 ).

Suggested Citation

  • Krzysztof Skrzypkowski, 2021. "An Experimental Investigation into the Stress-Strain Characteristic under Static and Quasi-Static Loading for Partially Embedded Rock Bolts," Energies, MDPI, vol. 14(5), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1483-:d:513226
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    References listed on IDEAS

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    1. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2019. "Flexibility and Load-Bearing Capacity of Roof Bolting as Functions of Mounting Depth and Hole Diameter," Energies, MDPI, vol. 12(19), pages 1-23, September.
    2. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2020. "Modified Rock Bolt Support for Mining Method with Controlled Roof Bending," Energies, MDPI, vol. 13(8), pages 1-20, April.
    3. Xingliang Xu & Suchuan Tian, 2020. "Load transfer mechanism and critical length of anchorage zone for anchor bolt," PLOS ONE, Public Library of Science, vol. 15(1), pages 1-15, January.
    4. Krzysztof Skrzypkowski, 2020. "Case Studies of Rock Bolt Support Loads and Rock Mass Monitoring for the Room and Pillar Method in the Legnica-Głogów Copper District in Poland," Energies, MDPI, vol. 13(11), pages 1-20, June.
    5. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2020. "Adjustment of the Yielding System of Mechanical Rock Bolts for Room and Pillar Mining Method in Stratified Rock Mass," Energies, MDPI, vol. 13(8), pages 1-23, April.
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    Cited by:

    1. Jianhang Chen & Ziwei Ding & Saisai Wu & Junwen Zhang, 2022. "Studying the Bond Performance of Full-Grouting Rock Bolts Based on the Variable Controlling Method," Energies, MDPI, vol. 15(9), pages 1-15, April.
    2. Krzysztof Lalik & Ireneusz Dominik & Paweł Gut & Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski, 2021. "Non-Destructive Acoustical Rock Bolt Testing System with Intelligent Filtering in Salt Mine ‘Wieliczka’," Energies, MDPI, vol. 14(17), pages 1-16, September.
    3. Jianhang Chen & Baoyang Wu & Peng Li & Guojun Zhang & Yong Yuan, 2022. "A Review of the Force-Transferring Mechanism of Entirely Grouted Cable Tendons Performed with Experimental Pull Tests," Sustainability, MDPI, vol. 14(24), pages 1-20, December.
    4. Mohammadamin Mirdarsoltany & Alireza Rahai & Farzad Hatami & Reza Homayoonmehr & Farid Abed, 2021. "Investigating Tensile Behavior of Sustainable Basalt–Carbon, Basalt–Steel, and Basalt–Steel-Wire Hybrid Composite Bars," Sustainability, MDPI, vol. 13(19), pages 1-13, September.
    5. Jun Wang & Derek B. Apel & Huawei Xu & Chong Wei & Krzysztof Skrzypkowski, 2022. "Evaluation of the Effects of Yielding Rockbolts on Controlling Self-Initiated Strainbursts: A Numerical Study," Energies, MDPI, vol. 15(7), pages 1-29, April.

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