Uppföljning av skuthantering på Vikan Kross : Boulder Handling Vikan Kross

Sammanfattning: This thesis is about to follow up the handling of boulders in Vikan Kross. Vikan Kross is a rock quarry owned by Skanska and it´s located in Gothenburg. According to Vikan, a boulder is a rough stone that is larger than 1-3 m3, and they are a recurrent problem because boulders cause a disturbance in production flow. A total of three field studies were done which focused on rock breaking, crushing and loading/blasting. The goal of this thesis is to increase knowledge about the handling of boulders at Vikan. The goal is also to find out whether it would be more desirable to contribute a larger size of the hydraulic hammer at rock breaking and crushing. The field studies should provide more knowledge and more understanding of why there is a problem with boulders at Vikan. In addition to field studies that were made to investigate the boulder handling were also literary studies, with respect to handling of the boulder works for Skanska, in case they have other rock breakings methods or solutions. By interviewing experts at Skanska increased knowledge about the production at the company. A situation analysis has been written that explains the handling of boulders. The result shows that it can be profitable with a larger size of secondary hydraulic hammers. A larger size means that it´s stronger and longer. The hydraulic hammer at rock breaking can be a major cost of production. Operating costs can be less but strength and weight increase, where there may be a more powerful effect on Vikans rock. For further studies should consider the costs for stop in crushing in calculations of boulders and costs at rock breaking. Also perform more field studies in order to get a more reliable result, which can show more solutions to the handlings of boulders at Vikan. In a project within handling of boulders there are many followings steps needs to consider for a working boulder handling. Based on the thesis, it has been clarified that, where the quarry has problems with boulder, you can´t get away from boulders but it can be reduced and prevented.