EE REPORTED: STANDING ALONGSIDE HIS DIESEL RIDE PARKED ALONG THE MINE TRAVELWAY REVIEWING MAINTENENCE ORDERREPORTS WHEN A PIECE OF DRAW ROCK MEASURING 1""X1""X2' FELL FROM BETWEEN ROOF BOLTS STR IKING HIS HEAD AND SLIDING DOWN HIS BACK. EXPERIENCED A POSSIBLE NECK STRAIN AND ABRASIONS TO HIS BACK. STARTED LOOSING SCHEDULED WORK DAYS 7-5-03.