§57.22602. Blasting from the surface (I-C mines).
30 C.F.R. § 57.22602
All blasting shall be initiated from the surface after all persons are out of the mine and any connecting mines.
Persons shall not enter the mine until a competent person has examined the blast sites and methane concentrations are less than 0.5 percent.
Notes, amendments, and revision history
Authority
Authority: 30 U.S.C. 811.
Source
Source: 52 FR 24941, July 1, 1987, unless otherwise noted.
Authority
Authority: 30 U.S.C. 811.
Source
Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.