Sökning: "stress rock"

Visar resultat 1 - 5 av 51 uppsatser innehållade orden stress rock.

  1. 1. Rock Wedge Stability Assessment : A Comparative Analysis of Limit Equilibrium and Discrete Element Methods

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

    Författare :Vilma Nordh; [2024]
    Nyckelord :Numerical modelling; wedge stability; 3DEC; UnWedge;

    Sammanfattning : Rock wedge stability is a common concern in underground excavations. Since the wedge stability influences the support design, it is important to use a wedge stability analysis method that can capture factors like excavation geometry, joint parameters and properties, rock mass properties, rock cover, and stress field as accurately as possible. LÄS MER

  3. 2. Development of Radon Detectors for Earthquake Prediction

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Alma Partos; Astrid Schöldström; [2023]
    Nyckelord :Radon; earthquake; gamma ray spectroscopy;

    Sammanfattning : The purpose of this project is to simulate the detection of γ-ray spectra emitted by radon isotopes and their daughters. This is done as a contribution to the development of radiation detectors to be used in a research project investigating the possibility of using increased amounts of the radioactive gas radon as an earthquake precursor. LÄS MER

  4. 3. Evaluation of structurally controlled rockfall hazard for underground excavations in seismically active areas of the Kiirunavaara mine

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

    Författare :Manuel Alberto Fuentes Espinoza; [2023]
    Nyckelord :Structurally controlled rockfalls; rockfalls due to seismic shaking; sublevel caving; fork layout; Unwedge; wedge analysis; deterministic analysis; probabilistic analysis;

    Sammanfattning : Sublevel caving operations at great depths are subjected both to large stress concentrations that are redistributed as the mining front progresses and to mining-induced seismicity. This is the case for Kiirunavaara mine, Sweden’s largest underground mine. LÄS MER

  5. 4. Investigation of Influential Contexts on Mining-front Seismicity at Kiirunavaara Mine

    Master-uppsats, Luleå tekniska universitet/Geoteknologi

    Författare :Bernardo Filizzola; [2023]
    Nyckelord :;

    Sammanfattning : Mining at great depths has become the reality for the mining industry in Sweden, that faces challenges in terms of increasing seismic events and sometimes intrinsically related rock mass failure. Kiirunavaara mine is owned by LKAB (located at north Sweden) and the company has been dealing with seismicity in a daily basis once the mine has been regarded as seismically active since 2007-2008 and presently has the largest seismic monitoring system in the world. LÄS MER

  7. 5. Utvärdering av larmgränser för extensometermätningar vid bergbyggande : En fallstudie vid Henriksdals reningsverk

    Master-uppsats, KTH/Byggvetenskap

    Författare :Jesper Spång; [2022]
    Nyckelord :Rock engineering; Alarm limits; Extensometers; Failure probability; Rock mass deformation; Bergbyggande; Larmgränser; Extensometrar; Brottsannolikhet; Deformation av berg;

    Sammanfattning : Vid en ombyggnation av Henriksdals reningsverk har ett vertikalschakt utformats och anlagts. Under berguttaget tillämpades extensometermätningar för att följa upp deformationer i en bergpelare mot en befintlig tunnel. Mätningar utfördes automatiserat och regelbundet. LÄS MER