MSHA urges miners to use gas detection equipment, adequate ventilation and appropriate respiratory protection.
A miner died from injuries sustained after falling through an unguarded opening on the fifth floor of a surface hoist structure.
Safety officials urge strict proximity controls and proper training after a fatal underground mining accident.
The agency issued separate fatality alerts highlighting hazards involving powered haulage equipment and falling material while investigations continue.
Federal safety officials release best practices after two fatal incidents involving heavy equipment loading and underground roof falls.
Federal safety data determines 27 mine operators and five contractors earning top honors for outstanding workplace safety performance.