MSHA - Code of Federal Regulations - 30 CFR 57.6310
Skip to content
MSHA - Title 30 CFR
30 CFR § 57.6310
Misfire waiting period.


When a misfire is suspected, persons shall not enter the blast area--

(a) For 30 minutes if safety fuse and blasting caps are used; or

(b) For 15 minutes if any other type detonators are used.


[58 FR 69596, Dec. 30, 1993]