软岩地层地下铁矿开采岩体移动影响范围及变化趋势分析

 在我国官庄东矿北采区，采用分段崩落法进行回采，虽然矿区地表建筑物远离设计的地表移动影响范围，但仍受到影响。结合官庄东铁矿北采区进行分析，对深部开采引起的动态岩体移动变形问题进行具体计算，分析深部开采的岩体移动变形规律及特点，实际观测和理论分析均表明，深部开采工作面的覆岩破坏，具有整体移动变形均匀的特点；软岩地层深部铁矿开采引起的地表移动变形发展缓慢且周期较长。

ANALYSIS OF INFLUENCED REGIONS AND CHANGE TREND FOR ROCK MASS DISPLACEMENT DUE TO MINING OF IRON ORE IN SOFT ROCK STRATA

In north mining area of Guanzhuangdong Mine，in which the sublevel caving was used，although the buildings are beyond the ground subsidence influence criteria，there has been widespread evidence of deformation of land surface far away from the mining area. Combining with analysis of north mining area of Guanzhuangdong Mine analysis，laws and characteristics of rock mass displacement and deformation caused by the deep mining of iron ore in soft rock strata are given. Both observed and theoretical analysis show that the subsidence of overburden layer is characterized by uniform and entire compression，displacement and deformation. And the surface deformation is continual and slow with a long duration of movement due to deep mining of iron ore in soft rock strata.