EE WAS SHOVELING LIMESTONE DUST AND STONE ONTO A CONVEYOR BELT THAT WAS NEAR SHOULDER LEVEL.AS MATERIAL HIT BELT, IT FLUSHED BACK INTO EE FACE &EYES. EE WAS WEARING WRAP AROUNG SAFETY GLASSES, HOWEVER,DUST ENTERED AROUND EDGES AND INTO BOTH EYES. EE IMMEDIATELY CALLED FOR HELP AND OTHER EE ESCORTED HER TO AN EYE WASH TO FLUSH HER EYES AND THEN TRANSPORT HER TO A DOCTOR. HIGH ALKALI