EMPLOYEE WAS OPERATING A CONT MINING MACHINE IN THE #3 HEADING WHEN A SMALL PIECE OF ROOF ROCK FELL STRICKING EMPLOYEE ON RIGHT HAND. HE WAS HOLDING THE REMOTE CONTROL UNIT THE MINES AND WHEN ROCK FELL. I FELL ONTO THE REMOTE CONT, MASHING HAND BETWEEN MACHINE AND ROCK AND LACERATED BOTTOM OF INDEX FINGER.