En toda mina subterránea, las instalaciones para entrada y salida de aire deben ser independientes, distantes no menos de 50 metros una de otra. Los sistemas de ventilación no podrán formar circuitos cerrados.
Decreto 1335 de 1987 →In force
Article 31
En Toda Mina Subterránea, Las Instalaciones Para Entrada Y Salida De Aire Deben Ser Independientes, Distantes No Menos De 50 Metros Una De Otra
Decreto 1335 de 1987 · mediante el cual se expide el reglamento de seguridad de las labores subterráneas.
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