Narrow Vein Mining Conference Proceedings 2008

Narrow vein mining operations form a relatively small but important part of the mining industry. The skills and expertise required to manage these natural resources are arguably highly specialized, and can include dealing with issues of potentially complex geology, a high to extreme nugget effect, high planned and additional dilution, the need for strong selectivity, high-stress conditions, low tonnes per vertical meter, and coarse gold and sometimes complex metallurgy. These 2008 proceedings will interest those involved in narrow vein mining, including geologists, mining and geotechnical engineers and metallurgists. The 28 multi-disciplinary papers cover exploration and resource geology, mining geomechanics, mining methods and design, dilution control, new technologies, and metallurgical processing. Case studies include operations in Australia, Africa, Canada, Europe and Greenland. The future of narrow vein mining depends upon skilled professionals and on developing practical and innovative methods for orebody definition, mining and mineral processing. All this must be undertaken within a framework of safe working practices, environmental sustainability and economic viability. Content: Front Matter • Table of Contents •Section 1. Keynote Addresses 1. Beyond Airleg Mining - Narrow Vein Mining in the 21st Century •Section 2. Case Studies 2. Narrow Vein Mining at Charters Towers, Queensland, by Longhole Open Stoping 3. Return to Hillgrove 4. The Challenger Gold Mine •Section 3. Exploration and Resource Geology 5. Continuity Risk in Narrow Reef Gold Deposits - Implications for Evaluation and Exploitation 6. Resource Estimation and Grade Assignment - A Comparison between Historical Production and Current Maxwell Mining Validation Case Study at Morning Star Gold Mine, Woods Point 7. The Ballarat East Goldfield - New Insights on an Old Model 8. Significance of Geological Control on Assay Data in the Narrow, High-Grade Gold Quartz Veins at the Sand Queen Mine, Comet Vale, Western Australia 9. Resource Modelling and Mine Design at Obuasi Mine, Ghana •Section 4. Metallurgy 10. Gold Particle Characteristics in Narrow Vein Deposits - Implications for Evaluation and Metallurgy 11. The Python - An Underground Processing Plant for Narrow Vein Mining •Section 5. New Applications/Research and Development 12. Mechanised Ore Removal from the Floor of Narrow, Flat Stopes 13. Recovery of Broken Ore Stocks Left on the Mine Floor and other Applications of the Underground Mobile Supersucker 14. Thermal Fragmentation - An Innovative Process for Mining Narrow High-Grade Precious Metal Veins 15. Monorail Technology - A Rapid and Cost-Effective Method of Decline Development •Section 6. Rock Mechanics/Mining Geotechnics 16. Augusta Gold-Antimony Mine 17. Strategies for Minimising and Predicting Dilution in Narrow Vein Mines - The Narrow Vein Dilution Method 18. The Use of Geotechnical Instrumentation to Optimise an Engineered Mine Design at Beaconsfield Gold Mine, Tasmania 19. Competing Factors in Support Selection for the West Zone of the Beaconsfield Gold Mine, Tasmania •Section 7. Stope Design and Mining Methods 20. Design Factors Leading to Prevention of Bridged Stopes at Jundee Operations 21. Drift and Fill - The High Value, High Recovery Mining System 22. Resue Firing and Dilution Control in Narrow Vein Mining 23. The Development and Implementation of a Fully Remote Stoping Method at Beaconsfield Gold Mine, Tasmania 24. Wallaby - The Horizontally Challenged Opportunity •Section 8. Victorian Gold Case Studies 25. Recent Experiences at the Kangaroo Flat Mine, Bendigo 26. Historical Challenges, Modern Solutions at Ballarat East 27. Tarnagulla Gold Mine 28. Reviving the Inglewood Goldfield in Central Victoria - Exploration and Operations

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