Unintentioinal roof fall discovered this time and date. Fall located in 22 Zone, 13 to 14 block, no. 9 hdg. Fall measured approximately 70'L X 18'W and undetermined height. Area mined on or about 1/17/2007. Roof was previously supported with 6' full grout resin bolts. Overburden between 160' and 180'.