A roof fall occurred in XC27 of the West A off the 2nd West off the Main North between entry 4 & entry 5. Fall is 11,000' outby the loading point. It is in a cross cut & crushed out a brattice between the neutral & return air course. Fall measured 35'L x 19'W x 11'H. There were no injuries or equipment involved. Ventilation was disrupted to unit 5. Brattice has since been rebuilt.