---
kind: "section"
citation: "30 C.F.R. § 57.6902"
title: "30"
number: "57.6902"
heading: "Excessive temperatures."
url: "https://uscodex.org/cfr/30/57.6902"
---

# §57.6902. Excessive temperatures.

- (a) Where heat could cause premature detonation, explosive material shall not be loaded into hot areas, such as kilns or sprung holes.
- (b) When blasting sulfide ores where hot holes occur that may react with explosive material in blastholes, operators shall—
  - (1) Measure an appropriate number of blasthole temperatures in order to assess the specific mine conditions prior to the introduction of explosive material;
  - (2) Limit the time between the completion of loading and the initiation of the blast to no more than 12 hours; and
  - (3) Take other special precautions to address the specific conditions at the mine to prevent premature detonation.

## Notes

### Source

Source: 61 FR 36801, July 12, 1996, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.