EE WAS REMOVING LINER PLATES INSIDE OF A GRINDING MILL. A DUST COLLECTOR WAS OPERATING TO EXHAUST AIRBORNE DUST FROM THE MILL. THE MILL WAS BUMPED INTO WITH A FORKLIFT, WHICH SHOOK SOME DUST L OOSE FROM THE INSIDE WALL. THE DUST WAS BLOWN PAST THE EE'S FACE & UNDERNEATH HIS SAFETY GLASSES. THE EE HAD A SPECK OF CEMENT DUST REMOVED FROM HIS EYE AT THE DOCTOR'S OFFICE.