Uppdatering av palldesign för Gruvberget och Masugnsbyn
Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Collection of structural data was performed in two open pit mines, Gruvberget in Svappavaara and the open pit mine in Masugnsbyn, both owned by the mining company LKAB. There was a need of collecting new structural data in Gruvberget since ore now is excavated on deeper levels compared to when the last structural mapping was performed. In Masugnsbyn there was no existing structural data. The purpose of collecting structural data was to update the bench design in both mines. Digital photogrammetry was used to collect structural data by photographing the slopes of the mines. The pictures were used to create 3D-models, which were mapped digitally using the ShapeMetriX3D software. Most of the slopes in both of the mines were documented and analyzed.The two pits were divided into design domains with similar orientations of the structures. The method used to perform this is called the ”cumulative sum technique”. The joint orientation trends were identified and domain limits were obtained, where the direction of the orientations changes. In cases where the domains became too large, additional domain limits were inserted to consider different directions of the slopes within a domain. Main joint sets were identified in each domain to enable kinematic analysis of structural failures. The design of the bench face angle was based on the results of the kinematic analysis and the most critical type of failure was used as the limiting factor. The bench height was designed based on the exist-ing equipment of the mine and the width of the bench was determined using the “Ritchie criteria”.
Place, publisher, year, edition, pages
2015. , 89 p.
Teknik, Berganläggningsteknik, palldesign, Gruvberget, Masugnsbyn, domänindelning, huvudsprickgrupper, strukturdata
IdentifiersURN: urn:nbn:se:ltu:diva-46231Local ID: 3e013221-2422-4baa-bfeb-d15900644b63OAI: oai:DiVA.org:ltu-46231DiVA: diva2:1019544
Subject / course
Student thesis, at least 15 credits
Mining and Geotechnical Engineering, bachelor's level
Validerat; 20150901 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved