FALL APP. 60' LONG, 18' WIDE, 0-8' HIGH - NO INJURIES, NO EQUIPMENT DAMAGE. NO BLOCKAGE OF VENTILATION OR ESCAPWAY. WILL NOT BE CLEANED UP. BREAKERED OFF AND DANGERED. WAS BOLTED WITH 8' TORQU E TENSION BOLTS AND 8' CABLE BOLTS SPOTTED IN. HAD SEVERAL 100 TON HEINZMAN JACKS SET IN AREA.