INJURED WAS DRILLING HOLE TO INSTALL ROOF BOLT. A PIECE OF ROCK FELL OUT OF THE ROOF AND STRUCK HIM ON THE LEFT ELBOW. HE HAD SOME SWELLING, SORENESS AND CONTUSION. INJURED CONTINUED WORKING U NTIL 1/20/01. HE WENT TO THE DOCTOR AGAIN WHO TOOK HIM OFF WORK. HE IS SCHEDULED TO SEE AN ORTHOPEDIC SURGEON.