A group of miners were shoveling the HG-13 xc 30 belt. Miner-1 was leap frogging Miner-2 to continue shoveling down the line. When passing Miner-2, Miner-1 attempted to knock debris from a squeaking top roller (center can) using shovel. The shovel contacted the belt rubber and was knocked from hands causing to strike IE in jaw. This resulted in a fracture to IE's lower jaw.