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
Pasta de Conchos mine disaster the miners were trapped. The National Mining and Metal Workers Union (SNTMMSRM) stated that the trapped miners were approximately below ground, via a mile-long horizontal shaft. Grupo México released a statement saying that the miners were about below ground when the explosion occurred. Guadalupe Rosales Martínez, the sister of a worker saved from the mine opening, told the "Los Angeles Times" that the workers had previously complained about a gas leak in the mine. Norma Vitela, the wife of a mine worker trapped inside the mine, told "The Miami Herald" that her husband complained about the same leak. By February