C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH › PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES › Subpart F—Drilling and Rotary Jet Piercing

30 C.F.R. § 56.7055

Intersecting holes

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

[56 FR 46508, Sept. 12, 1991]