Numerical modeling for a simulated rockburst experiment using LS-DYNA

Document identifier: oai:DiVA.org:ltu-77828
Access full text here:10.1016/j.undsp.2019.11.002
Keyword: 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 berganläggningsteknik
Publication year: 2021
Relevant Sustainable Development Goals (SDGs):
SDG 9 Industry, innovation and infrastructureSDG 3 Good health and wellbeing
The SDG label(s) above have been assigned by OSDG.ai

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.

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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