Section R11-1-272. Loading of explosives (blasting)

A.       All drill holes shall be sufficiently large to admit freely the insertion of the cartridges of explosives.

B.       Drilling shall not be started until all butts (bootlegs) of old holes are examined. Wash down the face and wash out the butts (bootlegs). If any misfires are found they shall be han- dled only by, or under the direction of, a competent and experi- enced person.

C.       No person shall be allowed to deepen drill holes which have contained explosives.

D.       After loading for a blast is completed, all excess explosives and detonators shall be returned immediately to their separate storage magazines.

E.       Double priming with fuse in a drill hole is prohibited.

F.       No tamping shall be done directly on a capped primer.

G.      Holes shall not be collared in bootlegs.

H.      Holes to be blasted shall be charged as near to blasting time as practical and such holes shall be blasted as soon as possible after charging has been completed. In no case shall the time elapsing between completion of charging to the time of blast- ing exceed 72 hours unless prior approval has been obtained from the State Mine Inspector.

Historical Note

Former Rule 2:72.