EIT Raw Materials, one of the six Knowledge and Innovation Communities (KICs) initiated by the EIT (European Institute of Innovation and Technology) and funded by the European Commission, has the mission to boost competitiveness, growth and attractiveness of the European raw materials sector via radical innovation and guided entrepreneurship. It aims to significantly enhance innovation in the raw materials sector by the sharing of knowledge, information and expertise. This must generate a significant impact on European competitiveness and employment by driving and fostering innovation and empowering students, entrepreneurs and education partners driving toward the circular economy. primary sector. It presents key outputs about already developed and implemented activities in mining engineering and metallurgy related programs.
The Printzsköld orebody in the Malmberget mine of Northern Sweden is currently under production and is centrally located in the mining area. The effects of the on-going sublevel cave-mining in this orebody are currently investigated with respect to cave development with an initial emphasis on the effects of stress redistribution and potential rock mass yielding. In this study, three-dimensional discontinuum modelling of the Printzsköld orebody is presented, in which the effect of three pre-existing large-scale geological structures have been studied. The results of the present study showed low stress build-ups in the crown pillar and cave bottom, due to shear slip developing along the structures. The presence of large-scale structures has no significant effects on the far-field stresses as shear slip along these structures is confined to cave boundaries. An analysis of the shear strength of the structures showed larger effects of slip on reducing friction angle than the reduction of cohesion.
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