2006 Copiapó mining accident
The 2006 Copiapó mining accident occurred on January 20, 2006, when an explosion occurred in the underground Carola-Agustina copper mine in Copiapó, Chile. It was caused by two trucks colliding, and the explosion covered the only escape route for the miners inside the mine.
Source: Wikipedia — 2006 Copiapó mining accident (CC BY-SA 4.0)