From high stress to de-stressed – mining in changing conditions

Authors: Bergström, P; Sahala, K; Hakala, M

DOI https://doi.org/10.36487/ACG_rep/1410_12_Bergstrom

Cite As:
Bergström, P, Sahala, K & Hakala, M 2014, 'From high stress to de-stressed – mining in changing conditions', in M Hudyma & Y Potvin (eds), Deep Mining 2014: Proceedings of the Seventh International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 209-224, https://doi.org/10.36487/ACG_rep/1410_12_Bergstrom

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Abstract:
This paper aims to describe the changes in stress and rock mass conditions during 13 years of deep mining. Stoping in originally high stress environment has led to detachment and subsidence of remaining oreblocks along schistosity surfaces of the immediate wall rock, while high-stress related seismicity has moved further from the actual mining area. Also presented is history of numerical stress modelling and its correspondence to the observed rock mass behaviour. Finally, adjustments made to mine planning, production and ground monitoring are described.

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