Tamping /(?)/

Tamp·ing

Tamping

n.
  1. The act of one who tamps; specifically, the act of filling up a hole in a rock, or the branch of a mine, for the purpose of blasting the rock or exploding the mine.
  2. The material used in tamping. See Tamp, v. t., 1.

Phrases & Compounds
Tamping iron
an iron rod for beating down the earthy substance in tamping for blasting.