EE WAS OPERATING A COAL HAULER IN PIT 16 WEST. HE WAS GOING INTO THE PIT EMPTY WHEN HE FELL ASLEEP AND LOST CONTROL. THE COAL HAULER RAN OVER A 5-8' LEDGE AND EE BOUNCED AROUND IN THE CAB, STR IKING HIS HEAD ON THE DOME LIGHT LENS. EE DID HAVE HIS SEAT BELT ON. HE RECEIVED NUMEROUS STITCHES.