At approximately 11:55 a.m. Sufco's tracking system lost communication in the bleeder area of 2 South. Tracking system power supplies in the area were checked first and found to have power. Two employees were dispatched and found a roof fall at #30 x-cut in #2 entry of the 2 South bleeder. All entrances to the area were immediately dangered-off and MSHA notifies. 8'Hx18'Wx18'L.