By Dominy, Simon
Slender vein mining operations shape a comparatively small yet vital a part of the mining undefined. the talents and services required to regulate those typical assets are arguably hugely really good, and will comprise facing problems with in all likelihood complicated geology, a excessive to severe nugget impression, excessive deliberate and extra dilution, the necessity for robust selectivity, high-stress stipulations, low tonnes in keeping with vertical meter, and coarse gold and infrequently advanced metallurgy. those 2008 lawsuits will curiosity these eager about slim 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 reports comprise operations in Australia, Africa, Canada, Europe and Greenland. the way forward for slender vein mining is determined by expert pros and on constructing functional and leading edge tools for orebody definition, mining and mineral processing. All this needs to be undertaken inside a framework of secure operating practices, environmental sustainability and fiscal viability.
desk of Contents
Section 1. Keynote Addresses 1. past Airleg Mining - slender Vein Mining within the twenty first Century
Section 2. Case reports 2. slim Vein Mining at Charters Towers, Queensland, by means of Longhole Open Stoping
three. go back to Hillgrove
four. The Challenger Gold Mine
Section three. Exploration and source Geology five. Continuity chance in slim Reef Gold Deposits - Implications for review and Exploitation
6. source Estimation and Grade project - A comparability among ancient construction and present Maxwell Mining Validation Case research at Morning celebrity Gold Mine, Woods element
7. The Ballarat East Goldfield - New Insights on an previous version
eight. value of Geological keep watch over on Assay facts within the slim, 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 slender Vein Deposits - Implications for assessment 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 flooring and different purposes of the Underground cellular Supersucker
14. Thermal Fragmentation - An cutting edge method for Mining slim High-Grade helpful steel Veins
15. Monorail expertise - A quick and good value approach to Decline improvement
Section 6. Rock Mechanics/Mining Geotechnics sixteen. Augusta Gold-Antimony Mine
17. ideas for Minimising and Predicting Dilution in slender Vein Mines - The slender Vein Dilution technique
18. using Geotechnical Instrumentation to Optimise an Engineered Mine layout at Beaconsfield Gold Mine, Tasmania
19. Competing elements in help choice for the West quarter of the Beaconsfield Gold Mine, Tasmania
Section 7. Stope layout and Mining equipment 20. layout components resulting in Prevention of Bridged Stopes at Jundee Operations
21. float and Fill - The excessive worth, excessive restoration Mining procedure
22. Resue Firing and Dilution keep an eye on in slender Vein Mining
23. the advance and Implementation of a completely distant Stoping procedure at Beaconsfield Gold Mine, Tasmania
24. Wallaby - The Horizontally Challenged chance
Section eight. Victorian Gold Case reviews 25. fresh reports on the Kangaroo Flat Mine, Bendigo
26. historic demanding situations, glossy recommendations at Ballarat East
27. Tarnagulla Gold Mine
28. Reviving the Inglewood Goldfield in important Victoria - Exploration and Operations
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Ore shoot/mineralisation controls Introduction Two key controls to gold mineralisation and ore shoot formation have been identified at Clogau; lithogeochemical and structural. The lithogeochemical control relates to the interaction between gold-bearing fluids and the Clogau Formation shales. The structural controls combine the effects of vein-hosting fracture refraction by greenstone sills and vein splitting/branching (Dominy, Phelps and Camm, 1996). Lithogeochemical control of the Clogau Formation Gold mineralisation is exclusively contained within the quartz reefs where they are hosted within dark graphitic shales.
The difficulty of evaluating narrow high-nugget effect systems is well-documented (Dominy et al, 1997, 1999, 2000b, 2001, 2003; Dominy, Stephenson and Annels, 2003). A key part of any risk control strategy will include the application of structural geological principals through mapping, core logging, data interpretation and geological modelling. Structural geological studies of reef systems are often absent during evaluation and exploitation programs or where present, lack rigour or focus. This is despite the fact that the JORC Code and other reporting codes require geology and hence continuity to be considered (Sinclair and Vallée, 1994; Dominy and Phelps, 1996; Dominy et al, 1999; Dominy, Platten and Raine, 2003; 1.
Dilation on some is normal to sheet walls but some show evidence of oblique dilation. Dilution and small vein offsets result from aplite sheet emplacement FIG 19 - Combination of structures affecting gross vein envelope in a raise. 3 m minimum to 1 m maximum wall rock screen), undulation and some component of vertical displacement across aplite. 9 m along the line of the raise, seven per cent of the 13 m segment illustrated. 2 m best fit stope outline on the raise data (source: redrawn from Crew, 2002).
Narrow Vein Mining Conference Proceedings 2008 by Dominy, Simon