An unplanned roof fall occurred on 60-2 transfer belt, between 2&3 crosscut at spad 0270. The fall measured 8'X16'X30' on converyor belt and total fall was 60'X20'X4'. This area was developed in June 1997 and supported with 42"" resin bolts. A fall occured previously in the area in Aug 2005. Ventilation was not interrupted and passage was not hindered. Will be rehabilitated.