An unintentional roof fall occurred in #4 entry of E-mians 001 section. The section was idle at the time of the fall. Fall was discovered on pre-shift exam. The fall occurred in an intersection & spread into the x-cut 4-3 & x-cut 4-5. The area was bolted with 6' fully grouted resin bolts, T-3 and 10' cable bolts in the intersection. The fall was 70' L x 18' W x 91/2' thick.