Underground Retorts
57.22401
Underground retorts (I-A and I-B mines).
Illumination
57.22501
Personal electric lamps (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines).
Explosives
57.22601
Blasting from the surface (I-A mines).
57.22602
Blasting from the surface (I-C mines).
57.22603
Blasting from the surface (II-A mines).
57.22604
Blasting from the surface (II-B mines).
57.22605
Blasting from the surface (V-A mines).
57.22606
Explosive materials and blasting units (III mines).
57.22607
Blasting on shift (III mines).
57.22608
Secondary blasting (I-A, II-A, and V-A mines).
Appendix I to Subpart T of