Chapter 1 Summary 1.1 Significance of roof stability control of gently inclined broken orebody 1.2 Analysis of the present research situation at home and abroad 1.2.1 Research status of joint rock mass damage in deep metal mines 1.2.2 Stability classification of ore and rock in deep metal mine 1.2.3 Roof support and mechanism of deep gently inclined broken ore body 1.2.4 Stability of surrounding rock of deep gently inclined broken ore body 1.3 Main research content and technical route 1.3.1 Main research contents 1.3.2 Research methods and technical route Chapter 2 Engineering Background and Rock Mechanics Experiment 2.1 A gold mine 2.2 Mining technical conditions and three-dimensional model 2.2.1 Engineering geological conditions 2.2.2 Mining method and 3D model 2.3 Law and characteristics of ground pressure behavior 2.4 Stope ground pressure and its control theory 2.4.1 The form of ground pressure in the mining area 2.4.2 The main factors affecting the stope pressure 2.4.3 Stope stress distribution characteristics 2.5 Investigation on support type of gently inclined fracture gold deposit 2.5.1 -420 m level 2.5.2 -480 m level 2.5.3 -560 m level 2.5.4 -630 m level 2.6 Laboratory experimental study on rock mechanic 2.6.1 Rock tensile strength experiment 2.6.2 Rock uniaxial compression experiment 2.6.3 Rock triaxial compression test 2.6.4 In-situ stress measurement 2.7 Damage constitutive model of joint rock mass 2.7.1 Damage evolution law of jointed rock mass 2.7.2 Joint rock mass damage constitutive model 2.7.3 Damage constitutive model validation 2.7.4 Damage evolution characteristic analysis 2.8 Summary of this chapter Chapter 3 Information Acquisition of Structural Planes in Deep Rock Mass and Classification of Ore Rock Stability 3.1 Information acquisition of rock mass structural planes 3.1.1 Introduction to ShapeMetrix 3D system 3.1.2 Using monte carlo method to simulate rock mass structural planes 3.1.3 Three dimensional synthesis of jointed rock mass surface and acquisition of structural plane information 3.2 Stability analysis of surrounding rock blocks in mining areas based on block theory 3.2.1 Block safety factor 3.2.2 Block stress analysis 3.3 Summary of this chapter Chapter 4 Classification of Fractured Rock Mass Stability Based on Fractal Theory 4.1 Introduction 4.2 Fractal theory of fractured rock mass 4.2.1 Distribution characteristics of structural planes in fractured rock masses 4.2.2 4.2.3 Analysis of the influence of joint geometric parameters on fractal dimension 4.3 FT grading method 4.3.1 Determination of FT grading method indicators 4.3.2 Calculation of score values for various indicators in FT grading method 4.3.3 FT grading method evaluation criteria 4.4 Engineering applications 4.4.1 Project overview 4.4.2 Determination of joint monitoring area 4.4.3 Obtaining joint information in monitoring areas 4.4.4 Classification of rock mass stability in the experimental area based on FT grading method 4.4.5 Classification of rock mass stability in experimental areas based on traditional RMR grading method 4.4.6 Comparison and analysis of FT grading method and traditional RMR grading method results 4.5 Summary of this chapter Chapter 5 Evolution Law of Surrounding Rock Stress in Full Section Mining 5.1 Construction of numerical calculation model considering the actual distribution of joint fissures 5.1.1 Establishment of basic model 5.1.2 Random joint fracture network 5.1.3 Mechanical parameters and initial conditions 5.1.4 Simulation scheme 5.2 Mechanical characteristics analysis of surrounding rock in single mining site 5.2.1 Analysis of displacement of roof surrounding rock 5.2.2 Distribution of plastic zone 5.2.3 Stress analysis of surrounding rock based on pressure arch theory 5.3 Analysis of mechanical properties of surrounding rocks with different mining widths 5.3.1 Mining width 8 m 5.3.2 Mining width 9 m 5.3.3 Mining width 10 m 5.3.4 Comparison of mechanical states of surrounding rocks in different mining widths 5.4 Summary of this chapter Chapter 6 The Anchoring Mechanism of Long Anchor Cables on the Roof of a Fractured Ore Body at Depth 6.1 Introduction 6.2 Mechanical model for anchoring of fractured ore body roof 6.2.1 Anchor structure for broken roof 6.2.2 Shear stress analysis of jointed rock mass 6.2.3 Friction resistance analysis of jointed rock mass 6.2.4 Vertical compressive stress analysis of top plate 6.2.5 Analysis of minimum lateral squeezing force on the top plate 6.3 Mechanism of pre tensioning force of anchor cable 6.3.1 Distribution of shear stress in surrounding rock under pre tensioning force 6.3.2 Mindlin displacement solution for shear stress distribution of surrounding rock under preloading force 6.3.3 Relationship between pre tensioning force and surrounding rock interaction 6.3.4 Analysis of pre tightening force requirements and influencing factors 6.4 Design of anchor cable support for broken roof 6.4.1 Requirements for anchoring force o Chapter 7 Deformation Sensitivity of Stope Roadway of Deep Broken Ore Body and Long Anchor Cable Support 7.1 Introduction 7.2 3DEC model construction and reliability verification 7.3 Design of numerical calculation scheme of roadway instability mechanism 7.4 Influence of parameters on overall stability of roadway 7.4.1 The influence of structural parameters on displacement change 7.4.2 Influence of joint parameters on displacement change 7.4.3 Influence of buried depth and excavation on overall stability of roadway 7.5 Parameter sensitivity analysis 7.6 Deformation law of roadway under the action of long anchor cable support and reinforcement 7.6.1 Influence rule of long anchor cable spacing on roadway displacement 7.6.2 Influence of long cable row spacing on roadway displacement 7.6.3 Influence rule of long anchor cable length on roadway displacement 7.7 Chapter conclusion Chapter 8 Roof Stability Analysis of Gently Inclined Broken Ore Body Considering the Influence of Overhanging Crushed Zone 8.1 Introduction 8.2 Scheme design and random mechanism model construction 8.2.1 Calculation scheme design 8.2.2 Construction of random joint model 8.3 Determination of model mechanical parameters and boundary conditions 8.3.1 Selection of model mechanics parameters 8.3.2 Determination of model boundary conditions 8.4 Influence of crushed zone thickness and orebody dip angle on roof stability 8.4.1 Influence of long anchor cable support on roof displacement 8.4.2 Tractive force distribution law 8.4.3 Distribution of plastic region 8.4.4 Roof displacement distribution law 8.5 Chapter conclusion Chapter 9 Establishment of Intelligent Support Design Platform 9.1 Deep learning model building 9.2 Model training and structure optimization 9.3 Construction of intelligent support design software platform 9.3.1 RQD rock quality index 9.3.2 RMR rock mass geo mechanical classification 9.3.3 BQ engineering rock mass classification index 9.3.4 Q barton rock mass quality classification 9.3.5 GSI geological strength index 9.4 Engineering application 9.4.1 Monitoring area 1 9.4.2 Monitoring area 2 9.4.3 Monitoring area 3 9.4.4 Monitoring areas 4 Chapter 10 Comprehensive Optimization and Application of Deep Crushed Ore Body Mining Scheme 10.1 Introduction 10.2 Design of mining scheme of upward horizontal approach filling mining method 10.2.1 Pick one at a time, excavate first and then support 10.2.2 Dig one after another, support first and then excavate 10.2.3 Pick one every two and support in the middle
10.3.1 Determination of subjective weights 10.3.2 Determination of objective weights 10.3.3 Determination of portfolio weights 10.4 SPA-IVIFE-TOPSIS evaluation model 10.4.1 Theory of pairs analysis (SPA) 10.4.2 Interval intuitionistic fuzzy entropy (IVIFE) 10.4.3 SPA-IVIFE-TOPSIS evaluation model 10.5 Comprehensive evaluation of stope parameters 10.5.1 Development of evaluation indicators 10.5.2 Calculate contact information 10.5.3 Multi-attribute weights for each indicator 10.5.4 Determine the level of the program 10.5.5 Interval intuition fuzzy multi-Attribute decision-making 10.6 Mining industry testing 10.6.1 Overview of the test stope 10.6.2 Stope roof support 10.6.3 Main economic and technical indicators 10.7 Displacement and stress monitoring of key parts of the test stope 10.7.1 Borehole stress gauge monitoring 10.7.2 Convergence meter monitoring 10.7.3 Roof subsidence monitoring 10.8 Chapter summary Chapter 11 Conclusions and Outlooks of the Book 11.1 Full text conclusion 11.2 The main innovations 11.3 Prospect References
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