INJURED WAS OPERATING THE HEAD SIDE CUTTER DRUM ON LONGWALL SECTION. AT APPROX 70 SHIELD HE NOTICED A SHIELD TILTED DOWN. HE WAS POSITIONED 10' TO 12' OUT BY DRUM (TOWARD HEADGATE) HE STATED T HAT HE COULDN'T SEE WHAT HE WAS CUTTING. A ROCK FLEW OUT FROM THE DRUM AND HIT HIM IN THE LEFT EYE.