A document from the government's mining service SERNAGEOMIN showed that in order to lift the suspension, Codelco would have to hand in four reports of the collapse at El Teniente. The reports must include an analysis of the cause of the collapse, a recovery plan and an evaluation of its fortification systems, the document said.

The total death toll stood at six, including one person who died at the time of the accident on Thursday evening, 70 hours before the final trapped worker was found.

Codelco confirmed on Sunday that all five trapped workers at its El Teniente operations have died, as days of intense rescue efforts came away empty-handed after a powerful tremor wracked the underground mine last week.