EE WAS OPERATING A ROOF BOLTER, HE HAD INSTALLED A ROOF BOLT ALONG THE RIB & WAS SWINGING THE BOOM TO CENTER TO INSTALL HIS NEXT PATTERN BOLT WHEN A PIECE OF ROCK FELL OUT FROM THE MINE ROOF STRIKING HIM ON THE RT. SHOULDER, BACK & RT.FOOT . HIS RESULTING INJURIES WERE ABRASIONS TO HIS UPPER BACK, SOFT TISSUE INJURY TO HIS RT. FOOT & ANKLE & A COMP. FRACTURE TO HIS THORACIC SPINE.