ROOF FAILED ABOVE ANCHORAGE RESULTING IN ROOF FALL ONE BREAK OUTBY SURVEY SPAD 775 ON 1 LEFT MAINS AT INTERSECTION, #5 ENTRY EXTENDING ACROSS #6 INTERSECTION TO THE EDGE OF #7 NO EQUIPMENT INV OLVED. IT DID TAKE A BRATTICE BUT DID NOT SEEM TO AFFECT VENTILATION TO 001 MMU. BRATTICES ARE BEING MOVED.