Roof fall occured on 13-Belt @ 43 Blk. Fall was discovered by weekly examiner and MSHA inspector. Area was previously bolted with 8' tension bolts on 4x4 pattern and two (2) 12' tension bolts spaced every other row. Roof to floor support was previously set at fall area on 6-9-15 due to floor hoofing. Area also borders a large protection zone block for an abandon gas well.