Essays about: "seismicity"

Showing result 11 - 15 of 21 essays containing the word seismicity.

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

    University essay from Luleå tekniska universitet/Geoteknologi

    Author : Simon Krekula; [2017]
    Keywords : Rock mechanics; Rockburst; Seismicity;

    Abstract : 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. READ MORE

  3. 12. The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen

    University essay from Luleå tekniska universitet/Geoteknologi

    Author : Viktor Renström; [2016]
    Keywords : Rock mechanics; Numerical modeling;

    Abstract : When planning for a tunnel, the ground conditions in which the tunnel is going to be excavated through will be investigated to different extent. Lack of relevant pre-investigation data or misinterpretations of the available data can cause both economical and/or unexpected stability problems. READ MORE

  4. 13. Borehole Dimension Impact on LHD Operation in Malmberget Mine

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Markus Danielsson; [2016]
    Keywords : LHD; sublevel caving; fragmentation;

    Abstract : Sublevel caving is a highly mechanizable mass mining method normally utilized in large, steeply dipping orebodies. The fragmented ore flows freely, aided by gravity, down to the drawpoint while the surrounding waste rock caves in due to induced stresses and gravity. READ MORE

  5. 14. Seismic activity and end- or post-glacial faults in northern Fennoscandia, focusing on Sweden

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Kie Oyama; [2016]
    Keywords : Fennoscandia; seismicity; end post-glacial fault; deglaciation; glacial uplift;

    Abstract : During the late or post Weichselian glacial periods, about 9500 years ago, several faulting associated with large scale earthquakes were triggered in northern Fennoscandia. The end- or post-glacial scarps have a range of the lengths c. 3 to 155 km and the heights 0 to 30 m while most of them are reverse faults trending NE-SW with SE dips. READ MORE

  6. 15. A High Order Finite Difference Method for Simulating Earthquake Sequences in a Poroelastic Medium

    University essay from Uppsala universitet/Avdelningen för beräkningsvetenskap

    Author : Kim Torberntsson; Vidar Stiernström; [2016]
    Keywords : numerical analysis; numerical methods; numerical modeling; SBP-SAT; finite differences; high performance computing; geophysics; geomechanics; poroelasticity; fault mechanics; induced seismicity;

    Abstract : Induced seismicity (earthquakes caused by injection or extraction of fluids in Earth's subsurface) is a major, new hazard in the United States, the Netherlands, and other countries, with vast economic consequences if not properly managed. Addressing this problem requires development of predictive simulations of how fluid-saturated solids containing frictional faults respond to fluid injection/extraction. READ MORE