PT Freeport Indonesia, the operator of the mine, is slowly resuming its operations after some works began at Grasberg open-pit and mill on 28 May.
The accident occurred on 14 May when a tunnel collapsed underground training room at Big Gossan mine, more than a kilometer away from Arizona-based Freeport-McMoRan’s Grasberg mine, the third-largest open pit copper mine worldwide.
Freeport said that a preliminary inspection of the incident has been completed by the mine inspectors appointed by the Ministry of Energy and Mineral Resources.
The open-pit mine produces about 140,000 tons of copper ore per day. The output from its underground operations is 80,000 tons.