Sökning: "wedge stability"

Hittade 5 uppsatser innehållade orden wedge stability.

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. 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

4. 3. Study of Production Drifts Stability and Assessment of Reinforcement Requirements at LKAB Konsuln Test-Mine Levels 436 and 486 Using Geologic Structures Data, and Modelling Software – Dips and Unwedge:  a Part of dp1 Project (Mine Layout and Technology) of the Sustainable Underground Mining (Sum) Project

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Oludare Joseph Olufe; [2021]
   Nyckelord :Drift stability analysis; underground excavation reinforcement; underground mining stability assessment; geologic structures; wedges modelling; rock mechanical analysis; Unwedge program; Dips program;

   Sammanfattning : Study of Production Drifts Stability and Assessment of Reinforcement Requirements at LKAB Konsuln Test-Mine Levels 436 and 486 Using Geologic Structures Data, and Modelling Software - Dips and Unwedge:  a Part of dp1 Project (Mine Layout and Technology) of the Sustainable Underground Mining (Sum) Project Oludare Joseph Olufe Global population has been on exponential increase over the past half century. The population explosion is driving massive urbanization and infrastructure developments across the globe, which result in huge demand for metals, especially steel. LÄS MER

5. 4. En jämförelse mellan indirekta och direkta metoder för uppskattning av bergmekaniska egenskaper för bergmassan i Barkarby-området

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Nathalie Ljunggren; [2016]
   Nyckelord :Tunnelbana Akalla–Barkarby; deformationsmodul; spänningsanalys; strukturanalys;

   Sammanfattning : Detta mastersarbete görs i samband med projekteringen av utbyggnaden av tunnelbanan mellan Akalla och Barkarby i Stockholm tillsammans med Tyréns AB. Utbyggnaden innefattar två nya stationer; Barkarby station och Barkarbystaden och däremellan ca 1500 m tunnel i berg. LÄS MER

7. 5. Evaluation of methods for rock mass characterization and design of rock slopes in crystalline rock

   Master-uppsats, KTH/Jord- och bergmekanik

   Författare :Johanna Gottlander; []
   Nyckelord :Geology; rock mechanics; rock slope stability in fractured crystalline rock; rock mass characterization and classification; rock slope design; slope failure;

   Sammanfattning : Construction of rock slopes is needed in many civil work projects. It is for example very common in road and railway cuts, but other applications include excavation for tunneling or building foundations, where perhaps sensitive constructions are present in the immediate vicinity. LÄS MER