Employee was walking along panline on headgate side of shearer between #174-#175 shield F-11 longwall face. He had his right hand on the handrail and a piece of rock, 6"" x 10"" x 18"" fell from between the shields striking him on the right hand, causing a fracture to the right little finger. Employee began missing work on 10-05-05, and returned to work on 10-07-05.