AN UNINTENTIONAL ROOF FALL OCCURRED ON C-1 PANEL, NO.5 ENTRY 4-WAY INTERSECTION AT SPAD 4240. THE FALL WAS APPROX 18'W X 40'L X 12'H. THE FALL WILL BE CLEANED UP. CROSS BARS WERE ADDED AT APPR OACHES FOR ADDL SUPPORT AND THE CAVITY WILL BE SUPPORTED AS PER THE ROOF CONTROL PLAN. THE FALL CINTAINED 6' RESIN BOLTS AND WAS IN THE LAST OPEN BREAK IN THE BELT ENTRY ON THE 002-0 MMU.