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Optimering och design av Gruvberget Svappavaara
2012 (svensk)Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
Abstract [en]

The high demand for iron ore in the world has led to the startup of “LKAB 37”, which is a project aimed to increase the production by 35 % which means 37 Mton of ore products per year. To achieve this goal, LKAB has started up Gruvberget which is one of three planned open pit mines in Svappavaara. Production in Gruvberget began in May 2010 and is operated by LKAB Berg & Betong which is a subsidiary to LKAB. The life of mine is estimated to 2016 and the plan is to excavate 2 Mton of magnetite ore per year.Planning of open pit mines is economic in nature, and the process involves testing of different alternatives to find the alternative that generates the highest return. The aim of this thesis is to use the computer based mine planning tool, Maptek Vulcan, to analyze various production and design scenarios at Gruvberget and on the basis of this compile a new operating cost calculation concerning the year 2012-2015. Production proposal including financial calculations of new machinery for loading and transportation, presplit and the purchase of a new drill rig have been compiled in order to reduce costs and streamline operations at Gruvberget. An ultimate pit limit that generates the highest return has been developed by analyzing different options in the optimization module in Vulcan.The results show that a change of drill rig together with a change in the performance of presplit can decrease the overall operating cost by 4,3 Mkr while the ore reserve increases. New machinery, in terms of loaders and haulers, which is specially adapted to meet the required annual production, show an increased efficiency, but no decrease in cost per ton compared to current transport agreement. The existing contract is recommended to be reviewed in order to make sure that the planned production can be achieved or if a new fleet needs to be purchased. Different design proposals have been established based on the optimized geometry of the pit to find a layout where the ore tonnage is maximized and the strip ratio is kept low in order to obtain the highest profit. The most favorable option gives an ore reserve of 11.0 Mton, which is an increase of 3.5 % compared to the existing layout.

sted, utgiver, år, opplag, sider
2012.
Emneord [en]
Technology
Emneord [sv]
Teknik, Gruvplanering
Identifikatorer
URN: urn:nbn:se:ltu:diva-58711Lokal ID: f4a21fb9-8eb2-4b1f-a886-7c8adf06cad6OAI: oai:DiVA.org:ltu-58711DiVA, id: diva2:1032099
Fag / kurs
Student thesis, at least 30 credits
Utdanningsprogram
Natural Resources Engineering, master's
Examiner
Merknad

Validerat; 20120427 (anonymous)

Tilgjengelig fra: 2016-10-04 Laget: 2016-10-04 Sist oppdatert: 2017-02-16bibliografisk kontrollert

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