2010 Copiapó mining accident San Jose Mine were around 20% higher than at other Chilean mines due to its poor safety record. The collapse occurred at 14:00 CLT on 5 August 2010. Access to the depths of the mine was by a long helical roadway. A group nearer the entrance escaped, but a second group of 33 men were trapped deep inside. A thick dust cloud caused by the rock fall blinded the miners for as much as six hours. Initially, the trapped miners tried to escape through ventilation shafts, but the ladders required by safety codes were missing. Luis Urzúa, the duty shift
Miners' survival during 2010 Copiapó mining accident Although the emergency supplies were intended for only two or three days, the miners rationed them and were able to make them last for two weeks, running out just before they were discovered. They consumed “two little spoonfuls of tuna, a sip of milk and a biscuit every 48 hours” and a morsel of peach. The men used truck batteries to power their hard hat lamps for illumination. After his release from the hospital, Mario Sepúlveda said “All 33 trapped miners, practicing a one-man, one-vote democracy, worked together to maintain the mine, look for escape routes and keep up morale.”