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By Jan M Mutmansky; R V Ramani

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Extra info for 11th U.S./North American Mine Ventilation Symposium 2006 : proceedings of the 11th U.S./North American Mine Ventilation Symposium : the Pennsylvania State University, University Park, Pennsylvania, USA : 5-7 June 2006

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In the small project the best result was obtained, when air was taken from ivn1 at the level +310 m, and led via a separate connecting tunnel into Sarvisuo, assisted with a booster fan. In this case transfer of 59 m3 /s of air was achieved, which is satisfactory with the given usability grades. 6. Inlet only, presented as the alternative 1, was modified through increasing the shaft diameter up to 3 m in the new areas to get alternative 6. In addition all the fans in the old mine were removed to decrease pressure, so that all of the old mine acted as a single exhaust route.

G. 2005. org/, Internal Report. , Hackwood, J. and Lambert, L. 1995. An Integrated Mine Ventilation Management System, Proc. 3rd Canadian Conference on Computer Applications in the Mining Industry, Montreal, Canada, October 22–25, Ed. S. Mitri, Vol. 2, pp. 1–13. , Schreer, M. and Gauthier, P. 1999. Ventilation-on-Demand – Quantity or Quality – A Pilot Trial at Barrick Gold’s Bousquet mine, Proc. L. Martikainen Helsinki University of Technology, Espoo, Finland ABSTRACT: Orivesi mine is a 720 m deep gold mine in Finland.

The air velocity in the ramp increased in the vicinity of the exhaust shaft cave-in up to 5 m/s. 2. 4 m shafts worked almost without problems, when the inlet air shaft was equipped with the 1900 mm fan of the mine. No ventilation changes were required in the old mine. The dirty air was relatively well controlled, and the pressure differences between the new area and the old mine were small. The dirty air routed through to the exhaust shaft even without an exhaust fan. 2 Comparing alternative ventilation options Three different main shaft alternatives were compared for both the large and the small project.

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