AS THE EMPLOYEE WAS PREPARING TO DRILL A HOLE IN THE ROOF WITH THE ROOF BOLTER, A SMALL PIECE OF ROCK FELL FROM AROUND THE DRILL STEEL & HIT HIS LEFT HAND WHICH HE WAS USING TO GUIDE THE DRILL STEEL. HIS HAND WAS EXAMINED BY TWO INDIVIDUALS & SHOWED NO EXTERNAL SIGNS OF SWELLING, SCRAPES OR ABRASIONS AT THE TIME OF THE EXAMINATION.