EE WAS ON THE LAST ROW, FIRST BOLT BEING ISNTALLED, WHEN A ROCK AND COAL RIB THAT WAS 96"" L, 19TO47"" WIDE AND 10"" INCHES THICK SLID OFF TRAPPING HIS LEFT LEG. EE WAS REMOVED FROM THE MINE AND ABULANCE TO CAME GENERAL DIV. EE WAS ADMITTED AN DUNDE RWENT SURGERY.