EE WAS OPERATING A DOUBLE BOOM ROOF BOLTER & AS HE PLACED THE DRILL STEEL TO THE ROOF TO START A NEW HOLE A PIECE OF ROCK BROKE OUT FROM THE MINE ROOF, FALLING STRIKING HIM ON THE LEFT FOREAR M LACERATING HIS ARM. THE LACERATION REQUIRED 3 SUTURES TO CLOSE THE WOUND. HE RETURNED TO WORK FOR HIS NEXT REGULARLY SCHEDULED SHIFT MISSING NO WORK TIME.