75 670+300E panel was shot at end of day shift 11/4. Supv went to the area on 11/4 night shift & saw there was a block failure so the area was signed off until it could be investigated. Upon investigation it was determined the fall was above the anchorage point of the 5' split sets & 8' bolts although cable bolts were present in the back, so it was immediately reported to MSHA.