Sökning: "Rock loading"

Visar resultat 1 - 5 av 25 uppsatser innehållade orden Rock loading.

  1. 1. A bonded discrete element approach to simulate loading with hydraulic mining excavators

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Carl Andersson; [2021]
    Nyckelord :DEM; bonded DE; granular material; hydraulic excavator; wear; Archard s wear law; LS-DYNA; simulation;

    Sammanfattning : When operating hydraulic mining excavators the loading equipment is exposed to harsh conditions which lead to extensive wear of the equipment, especially the bucket and bucket teeth. Simulations are used to better understand the wear development and to evaluate new methods to operate excavators more efficiently. LÄS MER

  3. 2. A study of wear and load behaviour on bucket teeth for heavy-duty cable shovels

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Jamal Choudhry; [2020]
    Nyckelord :DEM; FEM; bucket; teeth; cable shovel; wear; Archard s law; LS-DYNA; scan;

    Sammanfattning : Many of today’s engineering advancements rely on minerals such as copper, gold and iron. For this reason, the mining industry plays an important role for the development of society and technological wonders. Mining excavators are commonly used tools for extracting the minerals from the mine. LÄS MER

  4. 3. Assessment of static performance of LKAB´s welded mesh : Laboratory testing and analysis

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

    Författare :Fredrik Eriksson; [2020]
    Nyckelord :;

    Sammanfattning : Surface support is an areal support, which is installed on rock excavation surface to prevent bulking of rock mass and retain loose rock fragments. Welded wire mesh is one type of surface support. Literature study indicates that there is a wide range of testing methods on mesh. LÄS MER

  5. 4. Structural Health of a concrete tunnel lining under complex in situ loading

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :LEONARDO DALLA ROSA; [2019]
    Nyckelord :;

    Sammanfattning : Supporting structures were designed for a utility tunnel in hard rock which was to be intersectedby some road tunnels. With the intersections involving partial overlapping between the idealcross-sections, a concrete lining and post-tensioned steel cables were added to support theutility tunnel prior to the excavation of the road tunnels. LÄS MER

  7. 5. To Move an Obelisk

    Kandidat-uppsats, Uppsala universitet/Egyptologi

    Författare :Wilhelm Jansson; [2019]
    Nyckelord :Obelisks; Obelisk ships; ancient Egypt; Shipbuilding; Loading unloading; Obelisker; Obeliskepp; antika Egypten; Skeppsbygge; Lastning avlastning;

    Sammanfattning : Today, there are more Egyptian obelisks outside of Egypt than there are left where they were made. The obelisks are certainly beautiful, but what lies beneath are uncountable hours, days and years of work. Work which made the obelisks end up where they are today. LÄS MER