EE WAS BOLTING ROOF IN #5 RT BT -HAD PULLED SOME DRAW ROCK DOWN & MASHED SUCTION HOSE ON BOLTER. WHILE REPAIRING HOSE, ANOTHER PIECE OF DRAW ROCK 16"" X 8"" X 1 1/2"" THICK FELL & STRUCK HIM ON H EAD & NECK. HE WAS TAKEN TO HOSPITAL -CHECKED & RELEASED - NOTE - THIS DID NOT SEEM TO BE A SERIOUS ACCIDENT AT TIME OF OCCURRANCE.