EE HAD POSITIONED A ROOF BOLTER FOR THE 1ST ROW OF BOLTS IN THE 4 RIGHT CROSSCUT. AS HE RAISED THE ATRS A PIECE OF ROCK APPROX 120"" LONG X 23"" WIDE X 2-3"" THICK FELL FROM BETWEEN THE BOLTS. A PIECE OF THE ROCK MEASURING 22"" LONG X 24"" WIDE X 3"" THICK STRUCK HIM ON THE RIGHT FOREARM RESULTING IN A LACERATION REQUIRING SUTURES.