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Geotechnical Design for Sublevel Open Stoping


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Table of Contents

Mining Method Selection
Self-Supported Mining Methods
Sublevel Open Stoping
Factors Controlling Stope Wall Behaviour
Scope and Contents of This Book
Sublevel Stoping Geometry
Stoping Geometries
Multiple Lift Open Stoping
Single Lift Stoping
Shallow Dipping Tabular Orebodies
Bench Stoping
Planning and Design
Geological and Geotechnical Characterisation
Stress Analysis in Stope Design
Design of Stoping Blocks
Detailed Stope Design
Rock Mass Characterisation
Characterisation from Exploration Core
Analysis of Logging Data
Geotechnical Mapping of Underground Exposures
Analysis of Mapping Data
Intact Rock Strength
The Mechanical Properties of Rock Masses
Rock Stress
Span and Pillar Design
Empirical Span Determination Using Rock Mass Classification Methods
The Stability Graph Method
Numerical Modelling of Stope Wall Stability
Pillar Stability Analysis
Drilling and Blasting
Longhole Drilling
Blast Design Parameters
Ring Design
Explosive Selection
Explosive Placement
Initiation Systems
Raise and Cut-Off Slot Blasting
Trough Undercut Blasting
Rock Diaphragm Blasting
Rock Reinforcement and Support
Ground Support Design
Rock Bolting of Open Stope Development Drives
Cable Bolting of Open Stope Walls
Cable Bolt Corrosion
Cement Grouting of Cable Bolts
Support Systems
Mine Fill
Unconsolidated Rock Fill
Cemented Rock Fill
Hydraulic Fill
Cemented Paste Fill
Open Stope Fill Operations Systems
Fill Monitoring and Quality Control
Dilution Control
Types of Dilution
Economic Impact of Dilution
Parameters Influencing Dilution
Cavity Monitoring System (CMS)
Dilution Control Plan
Scale-Independent Measures of Stope Performance

About the Author

Ernesto Villaescusa possesses over 25 years of applied research experience. He has worked with mining houses such as MIM Holdings, Noranda, WMC Resources, Penoles, Minera Autlan, CODELCO, BHP Billiton, Placer Dome Asia Pacific, and Normandy to develop guidelines for effective underground mining leading to the safe, economical extraction of ore. For the past 16 years, he has served as professor of mining geomechanics at the Western Australian School of Mines, where he has secured over $21 million of industry-funded mining research income, supervised over 30 masters and 10 Ph.D student theses, and been appointed to an industry chair in mining rock mechanics.


"Because of its continuing importance in most of the world's major metalliferous mining countries including, but not only, Australia, Canada, and the Scandinavian and South American countries, it is entirely appropriate that a book should now appear synthesizing 40 years' accumulated international experience with modern sublevel open stoping methods. ... The supremely well qualified to undertake this important task...because of his directly relevant industry, applied research, teaching and consulting experience, and his extensive list of publications in the area. ...Although, as the title suggests, the book has a geotechnical engineering orientation, it also contains considerable practical detail on open stoping layouts, design, and operations, and includes chapters on drilling and blasting, rock support and reinforcement, mine fill technology, and dilution control. ...I believe that this book will serve multiple purposes. It will serve as a specialist textbook for mining courses at the advanced undergraduate and postgraduate levels. It will also provide an authoritative, practically oriented reference work for those involved in the industry, both in mining operations and as consulting engineers, particularly for those in the early stages of their careers and those seeking to develop new understandings and skills."
-From the Foreword by Edwin T. Brown, AC, Senior Consultant, Golder Associates Pty Ltd, Brisbane, Australia and Emeritus Professor, University of Queensland, Australia

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