Mine examiner found a roof fall between No. 25 and 26 x-cut in the No. 1 entry of South Mains B return aircourse. Fall is approx. 15 feet long by 17 feet wide and 8 to 9 feet high. Cause of this fall was deterioration of the main roof due to weathering. Fall did not obstruct ventilation or escapeways and was re-supported for travel.