The fall occurred at the crosscut entry between #5 and #6 intake entry 140ft inby survey station #983 located on the Southwest Mains. The fall measured approximately 30ft long by 18 to 19ft wide by 7 to 8ft thick. The fall did not impair ventilation or obstruct the primary escape way. No persons or equipment were involved. The area was blocked off and isn't intended to be cleared.