EMPLOYEE WAS CLEANING MUD OUT OF THE PRIMARY CRUSHER'S FEEDER FLOOR UTILIZING A SHORT SPUD BAR AND A 10 LB SLEDGE HAMMER. HOLDING BAR WITH HIS LEFT HAND AND HOLDING THE HAMMER WITH HIS RIGHT HAND, EE WOULD STRIKE BAR WITH HAMMER TO DISLODGE MATERIAL. EE MISSED BAR WITH HAMMER HEAD AND INSTEAD PINCHED RIGHT INDEX FINGER BETWEEN END OFBAR AND HAMMER.