INJURED STATED THAT HE WAS SPOTTING ROOF BOLTS WHEN A PIECE OF ROCK FELL FROM BETWEEN BOLTS AND STRUCK INJURED ON THE RIGHT SHOULDER CAUSING PAIN AND SORENESS. INJURED WAS TAKEN TO THE HOSPITA L. INJURED STATED THAT HE HAD A DISLOCATED SHOULDER. X-RAY SHOWED NO TARE. INJURED RETURNED TO WORK THE NEXT SHIFT. INJURED HAS BEEN IN THERAPY TO HELP RELIEVE SORENESS.