DRIVING GETMAN LRD220 TRACTOR DOWN MAIN SOUTH TRAVELWAY HAULING SUPPLIES INTO THE MINE. RON OVER A ROCK IN THE TRAVELWAY HITTING MY HEAD ON THE CANOPY. AT THE TIME OF ACCIDENT HE DID NOT MISS ANY WORK. AFTER HITTING HIS HEAD UNDERGROUND AFTER THE ACCIDENT AND BEING IN PAIN HE DECIDED TO SEE DOCTOR RESULTING IN TESTING REVEALING A HERNIA TO HIS NECK