2008 : The explosion was the mining industry 's worst disaster in 40 years . The West Virginia mine that exploded in 2008 had a sudden influx of gas . It 's too soon to say whether the gas caused the explosion , or say . ( CNN ) -- The amount of methane was almost three times greater than normal .
2008 : The explosion was the mining industry 's worst disaster in 40 years . The West Virginia mine that exploded in 2008 had a sudden influx of gas . It 's too soon to say whether the gas caused the explosion , or say . The amount of methane was almost three times greater than normal .