---
kind: "section"
citation: "30 C.F.R. § 57.22602"
title: "30"
number: "57.22602"
heading: "Blasting from the surface (I-C mines)."
url: "https://uscodex.org/cfr/30/57.22602"
---

# §57.22602. Blasting from the surface (I-C mines).

- (a) All blasting shall be initiated from the surface after all persons are out of the mine and any connecting mines.
- (b) 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

### 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.