Browsing NTNU Open by Author "Ellefmo, Steinar Løve"
Now showing items 1-20 of 46
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A mineralogical-, mineral chemical- and spatial characterization of the Lomli iron deposit
Sepulveda, Fabian Schenker (Master thesis, 2019)Lomliforekomsten er en Neoproterozoisk magnetitt-apatitt-mineralisering som befinner seg i Storforshei, der Rana Gruber for tiden driver gruvedrift på jernoksider. Som en del av Rana Grubers ønske om å utvide malmdatabasen ... -
A neural network approach for spatial variation assessment – A nepheline syenite case study
Mena Silva, Camilo Andres; Ellefmo, Steinar Løve; Sandøy, Roar; Sørensen, Bjørn Eske; Aasly, Kurt (Journal article; Peer reviewed, 2020)The present geometallurgical study shows the application of a machine-learning methodology to the prediction of material properties from the Nabbaren nepheline syenite deposit in Norway. The approach used in this study ... -
A probabilistic approach to the value chain of underground iron ore mining: From deposit to product
Ellefmo, Steinar Løve (Doktoravhandlinger ved NTNU, 1503-8181; 2005:65, Doctoral thesis, 2005)Mining activities will eventually deplete any deposit. In a sustainability perspective, the deposit should therefore be utilised optimally during production. A prerequisite to achieve this is the deliberate and consistent ... -
Analysis of Deformation and Stress Distribution around Stopes in Mining using a Combination of Geostatistics and Numerical Analysis
Refsli, Christian Dyhr (Master thesis, 2013)In the mining industry there are several methods to predict how the rock mass will behave. One of those methods is numerical analysis with modeling software, e.g. Finite Element Method (FEM). These numerical methods require ... -
Application of Soft Data in Nodule Resource Estimation
Ellefmo, Steinar Løve; Kuhn, Thomas (Peer reviewed; Journal article, 2020)Minerals and metals are of uttermost importance in our society, and mineral resources on and beneath the deep ocean floor represent a huge potential. Deciding whether mining from the deep ocean floor is financially, ... -
Assessment of undergorund mining of Nussir copper deposit: With special emphasize on cut-off and mining method
Sletten, Audun Mortveit (Master thesis, 2012)The narrow steeply dipping strata bound sediment hosted copper deposit, Nussir, located in Kvalsund community, Finmark, Norway, have been subject to an assessment of underground mining. Resources classified as Indicated, ... -
Assessment of underground alternatives at Engebø rutile deposit using the Mineable Shape Optimizer
Isaksen, Sondre (Master thesis, 2017)Computer software is nowadays commonly being utilised for mine planning purposes, MSO is such a software and is used to find the optimal stope shapes and dimensions for a given block model, representing an orebody, in terms ... -
Assessment of Undiscovered Mineral Resource Potential at the Northern Mid-Atlantic Ridge (MAR) and on the Norwegian Mainland: Method development and applications
Juliani, Cyril Jérôme (Doctoral theses at NTNU;2019:137, Doctoral thesis, 2019)Marine mineral resources, such as seafloor massive sulfides (SMS), may address future needs in raw materials for nations aiming to sustain industrial and economic development. Past exploration of these seabed resources, ... -
Dagbruddsalternativer i en industrimineralforekomst
Hilmarsen, Tor Helge (Master thesis, 2013)I denne oppgaven er det gjort et forsøk på å optimalisere utvidelsen av marmorbruddet til Brønnøy Kalk AS og dele det inn i pushbacker. Dataverktøyet NPV Scheduler er brukt for å generere optimaliserte bruddalternativer ... -
Dagbruddsdesign med diskontering av kontantstrøm
Hjelle, Eirik (Master thesis, 2016)«Dagbruddsdesign med diskontering av kontantstrøm» er en masteroppgave skrevet at Eirik Hjelle. Oppgaven er utført ved Institutt for geologi og bergteknikk (IGB) ved Norges teknisk-naturvitenskapelige universitet (NTNU). Rana ... -
Dagbruddsstabilitet i Norcem Kjøpsvik
Thoresen, Sverre Paulsen (Master thesis, 2019)Sammendrag Dagbruddsområdet til Norcem Kjøpsvik er i en situasjon hvor en optimalisering av dagbruddets vegg er av interesse. Denne oppgavens mål er å undersøke total- og detaljstabilitetsforholdene for endelig planlagt ... -
Design parameters for the Engebø open pit: With focus on slope stability
Ommedal, Arnstein (Master thesis, 2013)The objective of this thesis was to examine the geotechnical conditions at the Engebøfjell in Naustdal Municipality, Sogn og Fjordane, Norway with regard to a proposed open pit mine there. Another aim was to develop design ... -
Economic block model development for mining seafloor massive sulfides
Lesage, Maxime; Juliani, Cyril Jerome; Ellefmo, Steinar Løve (Journal article; Peer reviewed, 2018)To support open-pit studies related to seafloor massive sulfides mining projects, an economic block-model is required. A modular framework is proposed to produce economic block models accommodating various levels of data. ... -
Estimating the blast sill thickness using changepoint analysis of MWD data
Vezhapparambu, Veena Sajith; Ellefmo, Steinar Løve (Peer reviewed; Journal article, 2020)Measurement while drilling (MWD) data are collected during production drilling in the open pit operation in question. On every bench in the open pit, a fractured marble zone (sill) is left on top of the hard and un-fractured ... -
Exploration of Sediment Hosted Massive Sulfide (SHMS) deposits in the Barents Sea
(Master thesis, 2019)Barentshavets geologi hjemmer flere hydrokarbonreservoarer, som gjør den til en økonomisk viktig del av norsk sokkel, og er tidligere blitt grundig undersøkt på grunn av dette. I denne oppgaven blir regionen utforsket med ... -
Feasibility of Deep-Sea Mining Operation Within Norwegian Jurisdiction
Frimanslund, Erik Kristian Thon (Master thesis, 2016)Numerous hydrothermal vent sites are discovered along the Arctic Mid-Ocean Ridge (AMOR), stretching some 1,050 km from Jan Mayen to Svalbard, mostly within Norway s economically exclusive zone (EEZ). Associated with these ... -
First hyperspectral imaging survey of the deep seafloor: High-resolution mapping of manganese nodules
Dumke, Ines; Nornes, Stein Melvær; Purser, Autun; Marcon, Yann; Ludvigsen, Martin; Ellefmo, Steinar Løve; Johnsen, Geir; Søreide, Fredrik (Journal article; Peer reviewed, 2018)Hyperspectral seafloor surveys using airborne or spaceborne sensors are generally limited to shallow coastal areas, due to the requirement for target illumination by sunlight. Deeper marine environments devoid of sunlight ... -
Forslag til adkomstløsning for fremtidig brytning av forekomstene Rupsi, Giken og Charlotta i Sulitjelma - Med forslag til løsning for oppboring av Rupsi-forekomsten
Ramlo, Elisabeth (Master thesis, 2015)Nye Sulitjelma Gruver AS planlegger ny drift i Nordgruvefeltet i Sulitjelma, nærmere bestemt på den hittil uberørte Rupsi-forekomsten, på bunnen av Nedre Charlotta gruve og på forlengelsen av Giken-forekomsten. Til dette ... -
Geologisk utvikling og 3D modellering av randsonen i Svea Nord forekomsten: Med fokus på mellomstein, overliggende bentonittlag og konsekvens for brytningen
Velve, Håvard (Master thesis, 2013)Denne hovedoppgaven er skrevet i samarbeid med Store Norske Spitsbergen Grubekompani (SNSG) som et bidrag i kartleggingen av randsonen til Svea Nord kullgruva 50 km sørøst for Longyearbyen på Svalbard. Gjennom geologiske ... -
A Geometallurgical Approach Applied to the Tromsdalen Calcite Operation
Lang, Aleksandra Maria (Doctoral theses at NTNU;2020:161, Doctoral thesis, 2020)The motivation behind the thesis was to increase the knowledge and to expand the possibilities within industrial mineral mining, an important mining sector in Norway. This was done through extensive deposit study and an ...