Roof fall found by examiner the return air courses of MMU-001. Fall was located at 15+30 #1 entry of panel #1 zone. Area had been isolated with timbers prior to fall. The fall was 50'Lx18'Wx15'H. Area was supported with 5'fully grouted resin bolts. Area was developed on 1/29/08. No inuries/block of air flow or passage.