Mine safety
Mine safety comprises practices, equipment, and systems that reduce hazards to workers during mining and mineral processing.
Mine ventilation: The circulation and control of air in underground mines to supply oxygen and remove contaminants, heat, and explosive gases. Ventilation dilutes methane and dust while carrying respirable contaminants away from workers.
Mine hazard: A condition or activity in a mine with the potential to cause injury, illness, or damage. Safety programs begin by identifying hazards before selecting controls.
Coal mining: The extraction of coal from underground or surface deposits. Coal mines face particular risks from methane, coal dust, and ground instability.
Monongah mining disaster: A 1907 coal mine explosion in West Virginia that killed 362 miners and rescuers. The disaster intensified public pressure for stronger mine-safety oversight in the United States.
Hierarchy of controls: A framework that ranks hazard controls from elimination and substitution to personal protective equipment. It distinguishes stronger source-level controls from reliance on workers’ protective gear.
Methane drainage: The extraction of methane from coal seams before or during mining to reduce gas emissions and explosion risk. Removing methane at its source reduces the explosive atmosphere ventilation must control.
Respirable crystalline silica: Fine airborne particles of crystalline silica that can penetrate deep into the lungs when inhaled. Drilling, cutting, and crushing rock can expose miners to silica dust.
Underground mining: The extraction of mineral deposits through tunnels, shafts, or other subterranean workings. Confined workings make ventilation, escape routes, and ground support especially important.
Hawks Nest Tunnel disaster: A 1930s industrial disaster in West Virginia in which workers developing a tunnel suffered mass silica exposure. The deaths exposed how production demands and weak protections could conceal occupational disease.
Personal protective equipment: Equipment worn to reduce exposure to workplace hazards, such as helmets, respirators, and hearing protection. PPE protects miners but cannot replace effective engineering and organizational controls.