Fire boss found roof fall at 5:15 am on 6/12/06) on working section of #1 North 1 blk inby station #2514 in #5 entry 2 blks inby feeder dump point. On 6/13/06 at 6:00 am fall had continued left to #4 & #3 entrys in direct line. Total of 3 intersections lost.