CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH (parts 56 to 58) > PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES > SUBPART F—Drilling and Rotary Jet Piercing (§57.7002 to §57.7807) > 57.7055—Intersecting holes.

57.7055—Intersecting holes.

Holes shall not be drilled where there is a danger of intersecting a misfired hole or a hole containing explosives, blasting agents, or detonators.

Code of Federal Regulations

[56 FR 46517, Sept. 12, 1991; 56 FR 52193, Oct. 18, 1991]