Sökning: "stopes"

Hittade 5 uppsatser innehållade ordet stopes.

  1. 1. Extraction of Backfilled Tailings in the Dannemora Mine – Economic Potential and Rock Stability Assessment

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :John Winlund; [2022]
    Nyckelord :backfilled tailings; Dannemora mine; iron ore; rock stability; stopes; återfylld anrikningssand; Dannemoragruvan; järnmalm; bergstabilitet; öppna brytningsrum;

    Sammanfattning : The cut-off grade determines what rock mass are economic to mine. At the Dannemora mine, in eastern Bergslagen, Sweden, previously processed ore generated tailings (enrichment sand) with an iron content of 21-22 % that was backfilled into large open bodies (stopes) in the mine between 2013-2015. LÄS MER

  3. 2. Identification and strength classification of weakness zones in the Garpenberg mine based on measurement while drilling (MWD)

    Master-uppsats, Luleå tekniska universitet/Geoteknologi

    Författare :Ioannis Peroulakis; [2022]
    Nyckelord :Drilling; MWD; Garpenberg; Mining; Geotechnics;

    Sammanfattning : Boliden’s Garpenberg mine produces Zn-Pb-Ag(Cu-Au) using a sublevel stoping with pastefill mining method. The orebody is strongly affected by the existence of weakness zones mainly consisting of Talc Schist and Phlogopite Schist which affect the design, planning and production of the stope. LÄS MER

  4. 3. Optimization of the steel-fiber dosage in shotcrete used in the Kankberg mine

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Pontus Larsson; [2018]
    Nyckelord :rock mechanics; shotcrete; bergmekanik; sprutbetong;

    Sammanfattning : The Swedish metal company Boliden has since the early 20th century been mining deposits in the mining field commonly referred to as the Skelleftefield in northern Sweden. The youngest of the active mines is the Kankberg mine which is an underground mine whose reserve contains gold and tellurium. LÄS MER

  5. 4. From Diesel to Battery Power in Underground Mines : A Pilot Study of Diesel Free LHDs

    Master-uppsats, Luleå tekniska universitet/Institutionen för ekonomi, teknik och samhälle

    Författare :Niklas Jäderblom; [2017]
    Nyckelord :LHD; Wheel loader; Sustainable Intelligent Mining Systems; Atlas Copco; Social License to Operate; Risk analysis; Change in work content; Battery power; LHD; Hjulastare; Sustainable Intelligent Mining Systems; Atlas Copco; Social License to Operate; Riskanalys; Förändring i arbetsinnehåll; Batteridrift;

    Sammanfattning : Load, haul and dump machines (LHDs) are commonly used in underground mines around the world. The machines are used to transport fragmented ore after blasting in the ore body. The main propellant used is diesel which accounts for a large part of the diesel consumed in mines today. LÄS MER

  7. 5. Induced Seismicity in the Dannemora Mine, Sweden

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Joanna Holmgren; [2015]
    Nyckelord :Mining-induced seismicity; phase picking; particle motion; local earthquake tomography; correlation; local magnitude;

    Sammanfattning : Induced seismicity is a common phenomenon that occurs as soon as the stress state in the subsurface is externally altered in a way that faults are destabilized. It is especially problematic in stable tectonic regions where the area is not used to earthquakes; the infrastructure is not built to withstand ground movement and thus when the induced seismicity occurs damage can follow. LÄS MER