INCIDENT WAS TO HAVE OCCURRED WHILE THIS EMPLOYEE WAS WALKING BEHIND THE SCOOP. HE SAID HE TRIPPED OVER A CRIB BLOCK LAYING ON THE MINE FLOOR COVERED UP WITH ROCKDUST. WHEN HE FELL HE LANDED O N HIS ELBOW. CAUSE OF THIS INJURY WAS AWARENESS AND NOT PICKING UP TRIPPING HAZARDS LAYING AROUND. COMPLIANCE WITH RULES/REGS NOT A FACTOR; MINER PROFICIENCY A FACTOR. EQUIP. NOT A FACTOR.