Para los frentes en roca, se pueden utilizar dinamitas corrientes o para roca, espoletas de aluminio de retardo o microrretardo, pero de todos modos con retardo inferior a 0.5 segundos, o microretardo.
Decreto 1335 de 1987 →In force
Article 126
Decreto 1335 de 1987 · mediante el cual se expide el reglamento de seguridad de las labores subterráneas.
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