A roof fall was discovered at apx. 7:00am on the 3 south mains panel, 7c/c, #6 entry between spad #4128 & #4179. The fall measured apx. 74 in length, 20 in width and 2 to 8 in thickness. There were no injuries or interruption in ventilation. The area was dangered off, the HV cable was re-routed and timbers were set preventing access to all approaches of the area.