Analysis stability of xishimen iron ore mine surrounding rock based on yielding approach index

The stability of skarn in the soleplate of ore body is bad and the mining ground pressure is serious in Xishimen iron ore mine. The ground pressure has become the key problem needs to be resolved to the production safety. Xishimen had established a group to research the stress-releasing mining especially, which had been applied to solve this hard problem effectively. The problem of ground pressure hazard have been serious again along with the increasing depth of mining. So we must research the methods to control the ground pressure again. Depending on the yield approach function,we have executed the stability analysis of surrounding rock combined with FLAC^3D. The results can supply as important references for the subsequent research of supporting and stress-releasing mining.