THERE WAS A FAILURE ON THE 3920-2380 STOPE. AT TIME OF FAILURE, STOPE WAS IN FINAL MUCK OUT PRIOR TO FILLING & WAS OPEN FROM 3920 TO 3980 LEVELS. FAILURE OCCURRED ALONG A LAMPROPHYRE DIKE THAT CROSSCUT THE HANGING WALL & RIGHT RIB. FAILURE PROPAGATED FROM THE 3980 TO 4040 LEVEL & FROM THE 2380 STOPE LINE TO 2340 STOPE LINE. FAILURE OCCURRED OVER APPROX 5 HRS & INVOLVED APPROX 8000