CHINA MINE ENGINEERING

In a super-scale and deep mine, the ore body is extremely thick and large. Extra large strip ore pillars are arranged between the panels. In this paper, the numerical simulation method is used to conduct a comparative study on the stress characteristics and plastic zone distribution of different de-stress schemes applied on the strip pillar. The effect of different de-stress schemes was revealed. A recovery method of strip ore pillar is put forward, which is “the first step: drift de-stress stoping; the second step: medium-long hole or long hole stoping with backfilling”. Its results can provide reference for de-stress mining under similar mining conditions.