(1) Explosives and blasting agents. These requirements must be followed when transporting explosives and blasting agents underground:

(a) Companion items.

(i) Explosives or blasting agents cannot be transported in the same shaft conveyance with other materials, supplies, or equipment;

(ii) Detonators and other explosives cannot be transported in the same shaft conveyance;

(b) Manual transportation. Explosives or blasting agents that are not in their original containers must be placed in a suitable container when transported manually;

(d) Locomotives. Explosives or blasting agents must:

(i) Not be transported on any locomotive;

(ii) Be separated by a minimum of two car lengths from the locomotive.

(e) Riding on a conveyance. When transporting explosives or blasting agents, no one can ride on:

(i) A shaft conveyance; or

(ii) Any other conveyance, except the operator, helper, or powder person.

(f) Crew haul trips. Explosives or blasting agents cannot be transported on a crew haul trip;

(g) Disposition at arrival. All explosives or blasting agents that are transported underground must immediately be taken to the place of use or storage.

(2) Quantity limit. The quantity of explosives or blasting agents taken to an underground loading area cannot exceed the amount estimated to be necessary for the blast.

(3) Unloading primers at the blast site. Primers must be:

(a) Unloaded after drilling has been completed and the holes in the round are ready for loading;

(b) Unloaded from the powder car at the face or heading;

(d) The powder car must be removed from the tunnel after the charge has been loaded.

(4) Electric detonators. Wires on electric detonators must be kept shunted until wired to the bus wires.

PDFWAC 296-52-68085

Underground transportation.