Sökning: "rockfall"

Hittade 3 uppsatser innehållade ordet rockfall.

  1. 1. Evaluation of the rock support system subjected to dynamic loads in Kiirunavaara

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Geoteknologi

    Författare :Simon Krekula; [2017]
    Nyckelord :Rock mechanics; Rockburst; Seismicity;

    Sammanfattning : LKAB’s underground mine in Kiirunavaara has experienced an increasing seismic activity the last ten years. This seismic activity is caused by the stress redistribution resulting from the mining method of large-scale sublevel caving. The energy from the seismic events propagate in the rock mass as seismic waves. LÄS MER

  2. 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

  3. 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