ABSTRACT
The Brunswick mine, wholly owned by Noranda Inc., is an underground operation producing a nominal quantity of 10,000 tons of ore per day from a polymetallic orebody containing zinc, lead, copper and silver. The mine, in continuous operation since 1964, is located near the city of Bathurst, New Brunswick, Canada (Figure 1). The main extraction method is long-hole stoping. Two shafts enable underground access, namely Shafts #2 and #3, whose sinking depths are respectively 900 and 1375 m. More than 100 million tonnes of ore have been extracted so far.
