Freeport Indonesia posted photos of the rescue efforts on its Facebook page after a mine collapse killed 21 people and buried seven others so far.
The Big Gossan undergound training facility at Freeport-McMoRan's Grasberg mine collapsed last Tuesday when 38 workers were training in a classroom.
Mining work at the Grasberg mine, owned by Phoenic, Arizona-based Freeport-McMoRan Copper and Gold, has stopped since the mine collapse in solidarity with the victims and to focus on rescue efforts, The Australian reported.
Indonesian President Susilo Bambang Yudhoyono has ordered Freeport and government agencies to conduct a thorough investigation of the incident.
Rescue workers have opened two access points to the incident area in the underground mining area at Big Gossen.
Before starting the rescue process, Freeport workers and the rescue team prayed together.
Rescuers working on the left side of the mine collapse
Images: Freeport Indonesia facebook page