基于屈服接近度的西石门铁矿巷道稳定性模拟研究

西石门铁矿矿体底板矽卡岩稳定性差,采动地压大,地压问题已成为制约该矿安全生产的关键问题。该矿曾经专门成立课题组进行卸压开采研究,方案实施后在当时取得较好效果,但随着回采深度的逐年增加,地压危害问题又凸显严重,于是需要再次进行地压控制研究。本文在此运用屈服接近度函数,结合FLAC3D建立模型进行围岩的稳定性分析,所得分析结果可为下一步的支护设计和卸压开采方案研究提供重要参考。

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 FLAC3D. The results can supply as important references for the subsequent research of supporting and stress releasing mining.