Chile mining regulator says investigation into fatal mine collapse will take months

Chile’s mining regulator Sernageomin says the investigation into the fatal El Teniente mine collapse that killed six workers will take months due to the accident’s complexity.

Chile’s National Geology and Mining Service (Sernageomin) has announced that the investigation into the fatal collapse at Codelco’s El Teniente copper mine will take several months to complete, underscoring the complexity of the country’s deadliest mining accident in years.

“Due to the complexity of the accident, it’s hard to determine an exact date,” said Andrés León, Sernageomin’s national director, in an interview with Reuters. “But in the next few months we should have something to report.”

The July 31 collapse at the world’s largest underground copper mine killed six workers and injured nine others, marking the most serious mining tragedy in Chile in decades. The incident forced Codelco, the state-owned copper giant, to suspend operations in parts of the mine for more than a week and triggered a nationwide debate over safety standards in the sector.

Codelco has since resumed limited operations at unaffected sections of El Teniente while continuing to cooperate with authorities in the ongoing investigation. The company has also pledged to review its safety protocols and strengthen monitoring systems across its divisions.

Chile, the world’s top copper producer, has maintained one of the mining industry’s most robust safety frameworks in Latin America. However, the El Teniente accident has renewed calls for deeper oversight and investment in preventive measures amid aging infrastructure and increasingly complex underground operations.