 |
Code of Federal Regulations (Last Updated: May 6, 2024) |
 |
Title 30 - Mineral Resources |
|
Chapter I - Mine Safety and Health Administration, Department of Labor |
|
SubChapter K - Metal and Nonmetal Mine Safety and Health |
|
Part 57 - Safety and Health Standards - Underground Metal and Nonmetal Mines |
|
Subpart T - Safety Standards for Methane in Metal and Nonmetal Mines |
|
Explosives |
§ 57.22608 - Secondary blasting (I-A, II-A, and V-A mines).
Latest version.
-
§ 57.22608 Secondary blasting (I-A, II-A, and V-A mines).
Prior to secondary blasting, tests for methane shall be made in the mine atmosphere at blast sites by a competent person. Secondary blasting shall not be done when 0.5 percent or more methane is present.