Anyone know how deep SGR can go with the decline ramp in the 007 zone and beyond ?
google returned " The optimum “changeover” depth from ramp haulage to shaft hoisting is 350m (1,150 feet). Source: Northcote and Barnes" Source :
http://www.mcintoshengineering.com/HardRockMinersHandbook/HardRockMinersRulesofThumb/MineLayout