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Numerical modeling for a simulated rockburst experiment using LS-DYNA
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5872-5173
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-9766-0106
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
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2020 (English)In: Underground Space, ISSN 2467-9674Article in journal (Refereed) Epub ahead of print
Abstract [en]

Ground support systems are commonly used to mitigate the potential consequences of rockburst in burst prone mines. To assess the capacity of ground support systems when subjected to dynamic loading, simulated rockburst tests using blasting were conducted at the Kiruna Mine. In this study, a numerical simulation for one of the field tests was conducted using the LS-DYNA code to investigate the dynamic response of the ground support systems including shotcrete and rockbolts. The numerical results showed a similar particle vibration pattern and a crack pattern to those of the field measurements. The effects of the detonator position and the charge configuration on the dynamic response of ground support systems are also discussed. Numerical results indicated that the peak particle vibrations on the tested panel increase along the direction of detonation propagation. It is difficult to use different charge concentrations in one borehole to investigate the effect of different dynamic loads on the dynamic response of support systems. Numerical results also indicated that 2D numerical modeling for simulated rockburst experiments could overestimate the dynamic response of ground support systems.

Place, publisher, year, edition, pages
Tongji University and Tongji University Press. , 2020.
Keywords [en]
Simulated rockburst experiments, Ground support systems, Numerical modeling
National Category
Geotechnical Engineering Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-77828DOI: 10.1016/j.undsp.2019.11.002Scopus ID: 2-s2.0-85084697682OAI: oai:DiVA.org:ltu-77828DiVA, id: diva2:1395689
Available from: 2020-02-24 Created: 2020-02-24 Last updated: 2020-05-28

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Yi, ChangpingNordlund, ErlingZhang, PingWarema, SenziaShirzadegan, Shahin

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