THE MAIN ROCK CHUTE, UNDER THE MAIN ROCKER SHAKER IN THE PLANT WAS STOPPED UP. TWO EES LOCKED OU THE NECESSARY EQUIPMENT & WHILE OBSERVING THE SITUATION, EE PLACED HIS HAND ON THE ROCK CHUTE. IN DOING SO, THIS CAUSED THE ROCK TO SHIFT. ALSOA LOOSE STONE CAME DOWN & STRUCK EE ON HIS RIGHT INDEX FINGER & PINKY FINGER.