Abstract:Open stoping with subsequent rock filling method and composite caving mining method are used for the mining of No. 92# ore body of Tongkeng Mine. For lack of timely and thorough treatment of goaf, rib spalling and roof fall often occur in the reserved panel columns for high horizontal stress,and many isolated fractured pillars have been formed. In this paper, the 201# line island rupture zone column is used as the test stope. The rock integrity test is carried out to evaluate the stability of the bottom structure of the stope. The numerical simulation method is used to analyze the rupture evolution law of the block column and evaluate the fracture column induction. Feasibility of caving, and the use of partial empty field-induced caving method combined mining, to achieve the collapse of the collapsed pillar. The dilution rate of test stope was reduced from 29.4% to 17.5%, and the loss rate was reduced from 43.8% to 26.3%. Good safety production effect was achieved. It provides technical reference for other fractured pillar mining under similar mining conditions.