Fall occurred in the #4 Entry of the #7 crosscut of the 10left section due to geological conditions. Fall was Approx. 85 ft. long, 16ft. high, and 17ft. wide. Fall area was bolted to plan with screen and 8ft. tension rebar and 16ft. passive cable bolts. No people, equipment or ventilation effected. Alternate escape way was rerouted from area.