MINERS WERE BOLTING TO FACE. THEY WERE PULLED BACK DIT TO GROUND CONDITIONS AND A JUMBO WAS BROUGHT IN SO THEY WOULD BE UNDER GOOD GROUND SUPPORT. AS THEY TRIED TO DRILL A BELLY, THE ROOF CAME DOWN. THE FALL WAS 8' X 8' X 3-4.5' THICK. THE LAST ROW OF BOLTS IN THE SCREEN CAME OUT.