REDPATH MINING'S raiseboring division completed a record breaking hole in May at Kirk-land Lake Gold's Macassa gold mine in Ontario. At a length of 1,010 metres, this raise became the longest raise bored hole ever accomplished in the Northern Hemisphere and all of the Americas. This concludes the first of the planned twin, 365-cm diameter ventilation raises extending from surface down to 5617 level.
展开▼
