Examiner was starting pre-shift, was checking fan & saw no water coming out of mine. He went to investigate & found roof fal in #2 entry of 1st NW Mains, 120' inby station #116. This is about 1500' inside mine. Fall was in intersection about 4 1/2' to 5' high, 25' by 20' Long & 18' to 20' wide. Area was bolted with 4' resin bolts. Area was dangered off on all approches with cribs