Seals and stoppings (I-A, I-B, and I-C mines).

  1. Law
  2. CFR 30
  3. Mineral Resources
  4. Mine Safety and Health Administration, Department of Labor
  5. Metal and Nonmetal Mine Safety and Health
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  7. Safety Standards for Methane in Metal and Nonmetal Mines
  8. Ventilation
  9. Seals and stoppings (I-A, I-B, and I-C mines).

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§ 57.22217 Seals and stoppings (I-A, I-B, and I-C mines).

All seals, and those stoppings that separate main intake from main return airways, shall be of substantial construction and constructed of noncombustible materials, except that stoppings constructed of brattice materials may be used in face areas.


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