Sökning: "Rock cuts"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Rock cuts.

  1. 1. Alternativ till bergbultar av stål i Kirunagruvans tvärortar

    Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Johan Mukka; [2021]
    Nyckelord :;

    Sammanfattning :  Rapportens syfte är att undersöka vilka störningar skrot från kamstålsbultar medför i LKAB:sunderjordsgruva i Kiruna. Vidare undersöks om det finns alternativa bultar eller tillvägagångssätt somuppfyller LKAB:s krav för bultning av tvärortar. LÄS MER

  3. 2. Rockfalls from rock cuts beside Swedish railroads : A full scale fieldtest, to investigate rockfalls and how rock bounces

    Master-uppsats, KTH/Jord- och bergmekanik

    Författare :Thomas Thorbjörnson Lind; [2016]
    Nyckelord :Rock cuts; rockfall; field test; coefficient of restitution; railway; Sweden; risk; Bergsskärning; stenras; fältförsök; coefficient of restitution; järnväg; Sverige; risk;

    Sammanfattning : Rockfalls is a major problem around the world, if they occur in populated areas, they can cause major damage to infrastructure, injure or kill people. For this reason, it is important to be able to predict where the risk of rockfalls and how to prevent and protect populated areas from them. However, it is no easy task to predict rockfalls. LÄS MER

  4. 3. Significance of Fracture Patterns in a Rock Mass during Excavation by Blasting in Bandhagen, Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Mattias Ryttberg; [2015]
    Nyckelord :Fracture sets; rock excavation; rock wall; instability; Spricksystem; utschaktning; bergvägg; instabilitet;

    Sammanfattning : When excavating a rock wall by blasting, pre-existing structures in the rock has a strong impact on the stability of the wall. For excavation in Bandhagen in Stockholm, the nature and orientation of the pre-existing geological features, namely fractures, were not taken into consideration before excavation begun. LÄS MER

  5. 4. Re-processing of reflection seismic data from line V2 of the HIRE Seismic Reflection Survey in the Suurikuusikko mining and exploration area, northern Finland

    Master-uppsats, Geofysik

    Författare :Amir Abdi; [2011]
    Nyckelord :;

    Sammanfattning : The Suurikuusikko gold deposit is located in northern Finland; it is the largest known gold resource in northern Europe. The acquired high resolution reflection seismic data along the c.30 km long profile V2 of the HIRE reflection survey in the Surrikuusikko gold mining and exploration area have been re-processed. A 15. LÄS MER

  7. 5. Proterozoic hydrothermal alteration and mineralization along the Protogine Zone in southern Sweden

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Daniel Larsson; [1996]
    Nyckelord :geography; geology; Proterozoic hydrothermal alteration; mineralization; Protogine Zone; Sweden; Earth and Environmental Sciences;

    Sammanfattning : Occurrences of high alumina rocks constituted by quartz, kyanite, rutile and Al-phosphates are spatially related with the Protogine Zone, a system of ductile and brittle deformation zones within the Proterozoic crust of southern Scandinavia. A hydrothermal origin has been proposed for high alumina rocks at Västanå, based on the chemistry of these rocks, while gradual transitions between magmatic rocks and high alumina rocks at Hökensås and Hålsjöberg suggest a similar origin. LÄS MER