为减少地下资源损失、增加矿山经济效益、提高生产环境的安全性，矿山“三下”开采越来越受到重视。以金口岭矿段“三下”矿体实际开采为工程背景，利用有限差分软件FLAC^3D建立矿山开采数值模型，研究分段空场嗣后充填采矿法的采场结构参数对采场围岩稳定性及地表变形的影响。研究结果显示，盘区长度太大而顶柱厚度和间柱宽度太小，不利于维持采场稳定和控制地表变形。综合考虑分析结果、矿山实际及经济合理性，得出最佳结构参数：盘区长度为60 m，顶柱厚度为7 m，间柱宽度为8 m，该参数既能维持采场围岩稳定，又能控制地表变形，为类似矿山开采提供一定的参考意义。

In order to reduce the loss of underground resources，improve the economic benefit of mine and the safety of production environment，the“three under” mining is paid more attention.According to the “three under” mining exploitation in Jinkouling mining section as the engineering background，using finite difference software FLAC^3D  to build the numerical model of mining，and then study the sublevel open stopping with subsequent mining structure parameters influence on the stope stability of surrounding rock and the deformation of the ground surface.The results show that it is not conductive to the maintenance of stope stability and control the deformation of the ground surface，if  the  panel length is too large and the thickness of top column and column width is too small.Considering the analysis results and the actual mining，reasonable economic situation，the panel length is 60 meters，top pillar thickness is 7 meters and inter column width is 8 meters for the optimal structure parameters，which can effectively maintain the stability of stope surrounding rock，but also can control the surface deformation，providing a certain reference significance for actual mining.