30 CFR § 77.1909
Explosives and blasting; use of permissible explosives and shot-firing units.
Except as provided in §77.1909-1, only permissible explosives and permissible shot-firing units shall be used in sinking shafts and slopes.
30 CFR § 77.1909
Explosives and blasting; use of permissible explosives and shot-firing units.
Except as provided in §77.1909-1, only permissible explosives and permissible shot-firing units shall be used in sinking shafts and slopes.
