关键词: 铁矿床, 滞留采空区, 治理顺序, 优化方法

Abstract: Combining current situation of retained goaf in typical mine，taking a combination of site investigation and numerical analysis to invert the forming process of retained goaf in the mine，and based on the analysis of mechanical response law of rock，optimization method of management sequence of retained goaf in iron deposit was put forward，which took the rock stress concentration grade and the surface deformation influence as main evaluation factors.Conclusions were as follows:①Surface subsidence changed significantly with each level of goaf formed，from small partial settlement developing into large failure zone.Maximum displacement occurred above goaf，and the settlement value ranged between 12.8 and 16.2 cm.②Each level of goaf surrounding rock stands compressive stress.Maximum stress occurred in the goaf side-wall，and tensile stress was formed in goaf surrounding rock with a large area exposed.So it should be treated as a priority.③Optimization method of management sequence of retained goaf was put forward，which had important guiding significance in treatment of retained goaf，pillar recovery，determination of deep mining scheme and safe production in underground metal mine.

Key words: Iron deposit, Retained goaf, Management sequence, Optimization method