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
Western Federation of Miners next decade, to the point where it had over two hundred locals in thirteen states. However, a struggle against mine owners in Leadville served to radicalize WFM leadership. Representatives of the Cloud City Miners' Union (CCMU), Local 33 of the Western Federation of Miners, asked for a wage increase of fifty cents per day for all mine workers not already making three dollars per day. The union felt justified, for fifty cents a day had been cut from the miners' wages during the depression of 1893. Negotiations broke down and 968 miners walked out. Mine owners, who had formed a