30 CFR Part 57Public Domain
§ 57.6312 — Secondary blasting
Subpart E — Explosives
Secondary blasts fired at the same time in the same work area shall be initiated from one source.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.