Although the mining operations of a coal deposit is always a risky business , due to the possibility of huge gas concentrations , there are certain theories that indicate the mine has an important lack of safety rules , very similar to the problem presented in the Sago Mine disaster in West Virginia with the accident that caused death of 12 miners on January 2 , 2006 . Union critics of the company openly refer to the incident as a " homicide . " After the successful rescue of 33 trapped miners in October 2010 in Copiapó , Chile , the case gained popularity again , and many people including bishop Raúl Vera demanded that the case be reopened . Grupo México has not responded
33 trapped miners
2010 Copiapó mining accident
Grupo México