By Dominy, Simon
Slim vein mining operations shape a comparatively small yet vital a part of the mining undefined. the talents and services required to regulate those ordinary assets are arguably hugely really good, and will contain facing problems with probably advanced geology, a excessive to severe nugget influence, excessive deliberate and extra dilution, the necessity for powerful selectivity, high-stress stipulations, low tonnes in line with vertical meter, and coarse gold and infrequently complicated metallurgy. those 2008 court cases will curiosity these curious about slender vein mining, together with geologists, mining and geotechnical engineers and metallurgists. The 28 multi-disciplinary papers hide exploration and source geology, mining geomechanics, mining tools and layout, dilution keep an eye on, new applied sciences, and metallurgical processing. Case stories contain operations in Australia, Africa, Canada, Europe and Greenland. the way forward for slender vein mining is determined by expert execs and on constructing sensible and leading edge equipment for orebody definition, mining and mineral processing. All this has to be undertaken inside a framework of secure operating practices, environmental sustainability and monetary viability.
Content:
entrance topic
• desk of Contents
•Section 1. Keynote Addresses 1. past Airleg Mining - slender Vein Mining within the twenty first Century
•Section 2. Case reviews 2. slender Vein Mining at Charters Towers, Queensland, by way of Longhole Open Stoping
three. go back to Hillgrove
four. The Challenger Gold Mine
•Section three. Exploration and source Geology five. Continuity probability in slender Reef Gold Deposits - Implications for review and Exploitation
6. source Estimation and Grade task - A comparability among old construction and present Maxwell Mining Validation Case examine at Morning famous person Gold Mine, Woods aspect
7. The Ballarat East Goldfield - New Insights on an outdated version
eight. importance of Geological keep watch over on Assay facts within the slender, High-Grade Gold Quartz Veins on the Sand Queen Mine, Comet Vale, Western Australia
nine. source Modelling and Mine layout at Obuasi Mine, Ghana
•Section four. Metallurgy 10. Gold Particle features in slim Vein Deposits - Implications for overview and Metallurgy
eleven. The Python - An Underground Processing Plant for slender Vein Mining
•Section five. New Applications/Research and improvement 12. Mechanised Ore removing from the ground of slim, Flat Stopes
thirteen. restoration of damaged Ore shares Left at the Mine ground and different purposes of the Underground cellular Supersucker
14. Thermal Fragmentation - An cutting edge strategy for Mining slim High-Grade beneficial steel Veins
15. Monorail expertise - A speedy and low-cost approach to Decline improvement
•Section 6. Rock Mechanics/Mining Geotechnics sixteen. Augusta Gold-Antimony Mine
17. suggestions for Minimising and Predicting Dilution in slim Vein Mines - The slender Vein Dilution procedure
18. using Geotechnical Instrumentation to Optimise an Engineered Mine layout at Beaconsfield Gold Mine, Tasmania
19. Competing components in help choice for the West quarter of the Beaconsfield Gold Mine, Tasmania
•Section 7. Stope layout and Mining tools 20. layout components resulting in Prevention of Bridged Stopes at Jundee Operations
21. waft and Fill - The excessive worth, excessive restoration Mining process
22. Resue Firing and Dilution regulate in slim Vein Mining
23. the improvement and Implementation of a completely distant Stoping procedure at Beaconsfield Gold Mine, Tasmania
24. Wallaby - The Horizontally Challenged chance
•Section eight. Victorian Gold Case stories 25. contemporary stories on the Kangaroo Flat Mine, Bendigo
26. old demanding situations, glossy options at Ballarat East
27. Tarnagulla Gold Mine
28. Reviving the Inglewood Goldfield in imperative Victoria - Exploration and Operations
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Extra info for Narrow Vein Mining Conference Proceedings 2008
Sample text
The Clogau mine is hosted principally within the Clogau Formation and contains greenstone sills, which increase its thickness to approximately 120 m (Figure 3). The Clogau Formation at the mine dips about 30° SE, and is cut by a 70° SE cleavage (Figure 2). Mineralisation The Dolgellau gold reefs form an east-northeast to west-southwest trending array of generally steeply dipping veins (Figure 2). The veins are internally complex and are composed of swarms of narrow (1 mm to 300 mm) subparallel veins separated by country rock sheets giving a total width of up to 6 m.
Resolution of local geological continuity and grade for Ore Reserve definition requires underground development (blocking out). It is possible to make a more formalised, but not quantitative, assessment of the geological risk in stope design (Snowden, 2006b; Dominy et al, 2006). Table 6 summarises vein complexities and Table 7 and Figure 22 illustrate possible risk categories for Nalunaq. Various potential stope outlines are shown in Figure 22 to illustrate the variation in dilution and recovery risk and the risk for different outlines is summarised in Tables 6 and 7.
Resource evaluation in the traditional sense in Clogau will be difficult, as is typical of all mines of the Dolgellau gold-belt. Identification of ore shoots, hence resolution of small-scale geological and grade continuity requires underground development. This development can be targeted based on drilling. Once an ore shoot is identified by development it is likely to be possible to extrapolate its extent based on mapping and drilling. The challenge is to define grade, based on the highly pockety nature of the gold.