A study of the behaviour of fully grouted rockbolts subjected to dynamic loading in underground mining

Authors: Mortazavi, A; Tabatabae Alavi, F

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DOI https://doi.org/10.36487/ACG_rep/1201_07_mortazavi

Cite As:
Mortazavi, A & Tabatabae Alavi, F 2012, 'A study of the behaviour of fully grouted rockbolts subjected to dynamic loading in underground mining', in Y Potvin (ed.), Deep Mining 2012: Proceedings of the Sixth International Seminar on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 105-116, https://doi.org/10.36487/ACG_rep/1201_07_mortazavi

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Abstract:
The aim of this work was to investigate the behaviour of fully grouted rockbolts subjected to dynamic loading in underground mining conditions. A comprehensive 3D analysis was conducted using the FLAC-3D code. A rectangular drift reinforced with fully grouted rockbolts was subjected to dynamic loads representing a rockburst at upper levels. The effects of bolt end plate on bolt dynamic behaviour were also evaluated. Proper interface elements were employed at bolt/grout and grout/host rock interfaces and a full stress analysis of a reinforced roof was carried out. The analysis results demonstrate the stress and displacement distribution along the bolt as a function of dynamic loading.

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