The mines were run Self_motion by Grupo México , the largest mining company in the country .

Grupo México released Statement a statement Statement saying Statement that the miners were about below ground when the explosion Attack occurred Coming_to_be .

By February 21 , 2006 Grupo México search teams and relatives of the trapped miners were beginning Process_start to lose Earnings_and_losses hope .

It was reported Reporting that mine workers had gone on strike Attack against Grupo México at least 14 times , `` not only for salary increases… but because of its constant refusal to review security and health measures . ''

Grupo México said Statement that they , in conjunction with the mining union , signed Sign_agreement a certificate on February 7 , 2006 declaring Expressing_publicly the mine safe .

On February 23 , 2006 Grupo México advanced Cause_to_make_progress to a part of the mine shaft where they believed two of the 65 workers were trapped .

The next day , Grupo México advanced Cause_to_make_progress approximately halfway into the 1.75-mile long mine , where an additional twenty-four miners were expected to have been found Know .

Again , nobody was found Know , and Grupo México hypothesized that either the miners were buried under debris or the miners were located in a deeper part of the mine .

On the evening of February 24 , Grupo México announced Expressing_publicly that search Scrutiny efforts were to be suspended Process_end for two or three days , due to the search Scrutiny teams advancing Cause_to_make_progress to a portion of the mine which leaked Motion out high levels of natural gas .

On the afternoon of February 25 the CEO of Grupo México confirmed Check during a press conference Social_event that `` there was no possibility of survival after the methane explosion Attack '' , based on a scientific report Reporting .