WHILE ROOF BOLTING, DRILL STEEL BECAME STUCK IN HOLE. INDIVIDUAL PULLED ON DRILL STEEL WITH HAND. WHEN DRILL STEEL CAME FREE PINCHED RT RING FINGER TIP BETWEEN DRILL STEEL AND CHUCK WRENCH, CA USING A LACERATION TO TIP OF FINGER NEEDING STITCHES. RELEASED TO RETURN TO WORK 10-19-01. REPAIR SCHEDULED FOR 10-25-01. WAS OFF WORK UNTIL10-30-01 WHEN RETURNED.