Highwall mining : applicability, design & safety / John Loui Porathur (CSIR-CIMFR Regional Centre, Nagpur, India), Pijush Pal Roy (CSIR-CIMFR, Dhanbad, India), Baotang Shen (CSIRO, Brisbane, Australia) , Shivakumar Karekal (University of Wollongong, NSW, Australia)

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Porathur, John L [VerfasserIn]

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Resource type: Ressourcentyp: Buch (Online)Buch (Online)Sprache: Englisch Verlag: Milton : CRC Press, 2017Beschreibung: 1 Online-Ressource (361 p)ISBN:

9781315171234
9781351694247

Schlagwörter:

Andere physische Formen: 9781138046900. | Erscheint auch als: Highwall mining. Druck-Ausgabe Boca Raton : CRC Press Taylor & Francis Group, 2017. xxiv, 323 SeitenLOC-Klassifikation:

HD9506

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Zusammenfassung: 2.2.5 Physical and mechanical properties2.2.5.1 Physico-mechanical property determination in Godavari Basin; 2.2.6 In situ strength of coal; 2.2.6.1 In situ strength test at Godavari Basin; 2.2.7 Hydro-geology; 2.3 Domain Block Delineation For Highwall Mining; 2.4 Determination of Data Uncertainty; 2.5 Recommendation For Identification of Highwall Mining Blocks; 3 Design formulations for web pillar and entry span; 3.1 Introduction; 3.2 Pillar Strength Formulae; 3.2.1 Obert and Duval formula; 3.2.2 Salamon and Munro formula; 3.2.3 Mark-Bieniawski pillar strength formulaZusammenfassung: 3.2.4 CSIR-CIMFR pillar strength formula3.2.5 CSIRO, Australia pillar strength formula; 3.2.6 Hustrulid and Swanson formula; 3.2.7 Load on pillars; 3.2.8 Safety factor; 3.3 Equivalent Width Concept; 3.4 Comparison of Pillar Strength Estimation Approaches; 3.5 Span Stability; 3.5.1 Laminated Span Failure Model (LSFM); 3.5.2 Simplified method based on roof layer thickness; 3.5.3 Span stability based on Rock Mass Rating (RMR); 3.5.4 Span stability based on CMRR; 3.5.5 Span stability based on Q-system; 3.6 Application of Numerical Modelling ToolsZusammenfassung: 3.6.1 Fast Lagrangian analysis of continua: FLAC and FLAC3D3.6.2 Distinct element code: UDEC and 3DEC; 4 Indian case studies; 4.1 Introduction; 4.2 Site A; 4.2.1 Extraction strategy and pillar design; 4.2.2 Geo-technical data; 4.2.3 Strategy for extraction; 4.2.4 Accuracy of web cuts; 4.2.5 Elastic numerical modelling for load estimation; 4.2.6 Results; 4.2.7 Empirical web pillar design; 4.2.7.1 Estimation of pillar strength; 4.2.7.2 Pillar load estimation; 4.2.7.3 Safety factor; 4.2.8 Extraction of III and IV seams; 4.2.8.1 Alternate strategy for improving recoveryZusammenfassung: 4.2.8.2 Subsidence impact on seam IIIA4.2.8.3 Subsidence impact on II seam; 4.2.8.4 Extraction of seam IIIA; 4.2.9 Extraction of seam II; 4.2.10 Extraction of seam I; 4.2.11 Numerical estimation of pillar strength; 4.2.12 Results; 4.2.13 Roof stability of web cuts; 4.2.14 Rock properties used for modelling; 4.2.15 Rock mass failure criterion; 4.2.16 Determination of local safety factor; 4.2.17 Modelling procedure; 4.2.18 Modelling results; 4.2.18.1 Model-I and Model-2; 4.2.18.2 Model-3; 4.2.18.3 Model-4; 4.2.18.4 Model-5 and Model-6; 4.2.18.5 Model-7; 4.2.19 Entry mouth stabilityZusammenfassung: Cover Page; Half title; Title Page; Copyright Page; Table of contents; List of Abbreviations; Preface; Foreword by Sutirtha Bhattacharya; Foreword by Dr. Hua Guo; About the authors; 1 Highwall mining: world scenarios; 1.1 Introduction; 1.2 Operation and New Developments; 1.3 International Status; 2 Geological characterisation for highwall mining operations; 2.1 Introduction; 2.2 Framework For Site Characterisation; 2.2.1 Topography and 3D stratigraphic units; 2.2.2 Geophysical studies at Godavari valley in India; 2.2.3 Geological structures; 2.2.4 In situ stressPPN: PPN: 898058589Package identifier: Produktsigel: ZDB-4-NLEBK

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