30 CFR § 57.22604 - Blasting from the surface (II-B mines).

---
identifier: "/us/cfr/t30/s57.22604"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 57.22604 - Blasting from the surface (II-B mines)."
title_number: 30
title_name: "Mineral Resources"
section_number: "57.22604"
section_name: "Blasting from the surface (II-B mines)."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "K"
subchapter_name: "METAL AND NONMETAL MINE SAFETY AND HEALTH"
part_number: "57"
part_name: "SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811."
regulatory_source: "50 FR 4082, Jan. 29, 1985, unless otherwise noted."
cfr_part: "57"
---


# 57.22604 Blasting from the surface (II-B mines).

All development, production, and bench rounds shall be initiated from the surface after all persons are out of the mine. Persons other than those designated by the mine operator to make methane tests shall not enter the mine until all blast areas have been tested for methane.