INJURED WAS INSTALLING ROOF BOLTS IN #7 ENTRY ON #3 UNIT WHEN A PIECE OF ROCK FELL AND HIT CANOPY, CAUSING IT TO BREAK INTO HALF OF IT INJURED ON THE RIGHT LEG, CAUSING PAIN AND SORENESS. HE WAS TAKEN TO HARRISBURG HOSPITAL BY AMBULANCEWHERE HE WAS X-RAYED AND RELEASED. HE WENT TO DOCTOR AND IS STILL HAVING THERAPY.