Fall was discovered on the 10 Left 6 section in the #11XC going from #4 to #5 entry, including both intersections. The fall was approx. 90' long, 17' wide, and the height is undetermined. The area was bolted with 8' tensioned rebar bolts as permanent support and 16' CC cable bolts as supplemental support. The cause of the fall was due to abutment pressures from remnant pillars.