A roof fall occurred in the last open x-cut in #5 entry, measuring 120'x18'x10' thick. Area was bolted with 3/4""x72"" tension rebar with T3 roof channels on 42"" ctr's. 2-10' long cable bolts are between each row of roof bolts. X-cut had been centered jacked with 100 ton jacks. Poor immediate roof with over mining at 60' and 1000' of overburden were contributing factors.