EE WAS BACKING A UTILITY VEHCILE INTO A STOPE TO DELIVER SUPPLIES. AN AREA OF THE VENTILATION DUCTING WAS LEAKING AIR, WHICH CAUSED DUST AND SMALL ROCK PARTICLES TO BLOW IN THE EE FACE AS HE P ASSED UNDERNEATH IT. SOME FOREIGN BODY OF DUST AND OR ROCK GOT INTO EE LEFT EYE.