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Equivalent Discontinuous Modeling Method of Jointed Rock Masses for DEM Simulation of Mining-induced Rock Movements

Abstract第5-6页
Chapter 1: Introduction第14-34页
    1.1 Background of the study第14-15页
    1.2 Review of the literatures第15-29页
        1.2.1 Scale effect on rock mass mechanical properties第15-16页
        1.2.2 Rock mass stability problems related to the transition of open-pit mining to underground mining第16-17页
        1.2.3 Different approaches to evaluate the fractured rock mass behavior in mining area第17-26页
            1.2.3.1 Empirical approaches to predict the mining induced rock mass movement第18-19页
            1.2.3.2 Numerical Approach to predict the mining induced rock mass movement第19-26页
                1.2.3.2.1 Continuous numerical approach to simulate mining induced rock movement第20-23页
                1.2.3.2.2 Discontinuous Numerical approach to simulate mining induced rock mass movement第23-26页
        1.2.4 Challenges in numerical modeling of rock mass第26-29页
            1.2.4.1 Challenges come from rock mass complexity第26-28页
            1.2.4.2 Challenges from modeling capability第28-29页
    1.3 Highlight of the proposed Equivalent Discontinuous Modeling Method (EDMM)第29-31页
        1.3.1 Features of the proposed EDM第29-30页
        1.3.2 Modeling procedures of the proposed EDM第30-31页
        1.3.3 Way of determining the joint mechanical properties of the proposed EDM第31页
    1.4 Statement of the problem第31页
    1.5 Objectives of the study第31-32页
    1.6 The structures of the thesis第32-34页
Chapter 2: Features of Rock Movements Induced by Mining Under Open-pit Final Slope第34-43页
    2.1 General第34-35页
    2.2 Caving of the goaf overlaying rock mass第35-37页
    2.3 Surface subsidence第37-40页
    2.4 Movement of the goaf side walls第40页
    2.5 Movement and failure of open-pit slope第40-41页
    2.6 Ground fissures第41-43页
Chapter 3: Determining Representative Elementary Volume (REV) of (EDCMs)第43-53页
    3.1 General第43-44页
    3.2 Building Equivalent Discontinuous Cube Models (EDCMs)第44-45页
    3.3 Intensive numerical simulation of EDCMs第45-46页
    3.4 Analyzing the simulation results and determines the Elastic moduli (E &v) of EDCMs第46-48页
    3.5 Building the relationship between elastic moduli and model sizes and determine REV sizes for different joint spacing第48-53页
Chapter 4: Equivalent Discontinuous Modeling of Fractured Rock Mass第53-73页
    4.1 General第53-54页
    4.2 Determining Joint Mechanical Properties of EDM of the study area第54-73页
        4.2.1 Building Equivalent Discontinuous Cube Models (EDCMs) for each sub-area of the project domain第55-57页
        4.2.2 Determining the initial properties of rock mass第57-58页
        4.2.3 Inverting the joint mechanical properties of each EDCMs第58-69页
            4.2.3.1 Determining benchmark strengths of EDCMs based on Equivalent Continuous Modeling Method (ECMM)第59-62页
            4.2.3.2 Selecting the appropriate controlling factors’ levels and determine their orthogonal experimental Scheme第62-63页
            4.2.3.3 Intensive numerical simulation of each EDCM based on the above designed orthogonal scheme第63-65页
            4.2.3.4 Analyzing orthogonal experimental results to determine the joint mechanical properties of each EDCM第65-69页
        4.2.4 Building the relationship between joint spacing and joint mechanical parameters第69-73页
Chapter 5: Case Study Ⅰ第73-94页
    5.1 General第73页
    5.2 Geology and geological structures of the mining area第73-76页
    5.3 Mining background of the Yanqianshan iron mine第76-80页
        5.3.1 Current situation of the western open pit slope and underground mining areas第77-80页
    5.4 Numerical simulation of EDM of the western final slope of the mining area第80-94页
        5.4.1 Building Equivalent Discontinuous Model (EDM) of the study area第80-82页
        5.4.2 Determining joint mechanical parameters of each subarea of the EDM第82页
        5.4.3 Conduct numerical calculation of EDM of the study area第82-83页
        5.4.4 Analyzing the pattern of rock mass movement and failure mechanisms of EDM第83-94页
            5.4.4.1 Pattern of rock mass movement and failure condition after mining layer 1第84-86页
            5.4.4.2 Pattern of rock mass movement and failure condition after mining layer 2第86页
            5.4.4.3 Pattern of rock mass movement and failure condition after mining layer 3第86-87页
            5.4.4.4 Pattern of rock mass movement and failure condition after mining layer 4第87-90页
            5.4.4.5 Pattern of rock mass movement and failure condition after mining layer 5第90-94页
Chapter 6: Case Study Ⅱ第94-115页
    6.1 General第94页
    6.2 Building the EDM of the open pit slope第94-96页
    6.3 Determining joint mechanical parameters of EDM of open pit slope第96-104页
        6.3.1 Building Equivalent Discontinuous Cube Models (EDCMs) with deformable intact rocks第97-98页
        6.3.2 Intensive numerical simulation of the developed EDCMs第98-101页
        6.3.3 Analyzing the simulation results and determines the joint mechanical properties of each EDCM第101-102页
        6.3.4 Building the relationship between joint spacing and joint mechanical parameters第102-104页
    6.4 Numerical simulation of EDM to determine slope factors of safety (FOS) through strength reduction method (SRM)第104-105页
    6.5 Condition of the slope failure based on this numerical simulation result第105-109页
    6.6 Numerical simulation based on ECM to determine slope factors of safety (FOS) through strength reduction factor (SRM) method第109-114页
    6.7 Summary of the simulation results on the open pit slope stability condition第114-115页
Chapter 7: Discussion and Conclusion第115-123页
    7.1 Discussion第115-120页
    7.2 Limitations and uncertainties第120页
    7.3 Conclusion第120-123页
Acknowledgements第123-124页
References第124-131页

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