Federal regulators on Tuesday issued new protections for miners against a type of dust long known to ... a half-century ago. Mining companies will have to limit concentrations of airborne silica ...

The Mine Safety and Health Administration within the U.S. Department of Labor has finalized stricter limits on silica dust exposure for miners, according to a press release from the department.

WASHINGTON (AP) — Coal miners will be better protected from poisonous silica dust that has ... exposure limit for crystalline silica for an eight-hour shift. Mine workers, community advocates ...

Coughing violently, he spit out what looked like moist and crusty bits of dark gray paper with black streaks — dead lung tissue, his respiratory therapist told us ... of coal mine dust ...