An unplanned roof fall was discovered on old #1 section (old #8 Belt Panel) one break outby the last line of crosscuts. Fall was from #5 entry to #8 entry. Date of development was 6/2010. No injuries or entrapment involved. No ventilation, escapeway, passageway or equipment involved. Fall was approximately 115 ft long x 19 ft wide x 19 ft high.