Numerical modeling for a simulated rockburst experiment using LS-DYNA
Document identifier: oai:DiVA.org:ltu-77828
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10.1016/j.undsp.2019.11.002Keyword: Engineering and Technology,
Environmental Engineering,
Mineral and Mine Engineering,
Teknik och teknologier,
Naturresursteknik,
Mineral- och gruvteknik,
Simulated rockburst experiments,
Ground support systems,
Numerical modeling,
Mining and Rock Engineering,
Gruv- och berganläggningsteknikPublication year: 2021Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: 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.
Authors
Changping Yi
Luleå tekniska universitet; Geoteknologi
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Erling Nordlund
Luleå tekniska universitet; Geoteknologi
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Ping Zhang
Luleå tekniska universitet; Geoteknologi
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Senzia Warema
Luleå tekniska universitet; Geoteknologi
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Shahin Shirzadegan
Luleå tekniska universitet; Geoteknologi
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>>
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identifier: oai:DiVA.org:ltu-77828
datestamp: 2021-05-10T23:03:27Z
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10.1016/j.undsp.2019.11.002
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lang: eng
title: Numerical modeling for a simulated rockburst experiment using LS-DYNA
abstract: 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.
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lang: eng
authority: uka.se
topic:
Engineering and Technology
Environmental Engineering
Mineral and Mine Engineering
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lang: swe
authority: uka.se
topic:
Teknik och teknologier
Naturresursteknik
Mineral- och gruvteknik
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lang: eng
topic: Simulated rockburst experiments
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lang: eng
topic: Ground support systems
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lang: eng
topic: Numerical modeling
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lang: eng
authority: ltu
topic: Mining and Rock Engineering
genre: Research subject
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Published
5
Validerad;2021;Nivå 2;2021-04-13 (alebob)
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