本文以小官庄铁矿东区为工程背景，在详细分析了其地压环境、采准进度、各矿块完成采准的可能时间、回采展开条件以及对产量要求的满足程度等基础上，提出三种回采方案，并采用三维非线性有限元计算进行方案比较，最后提出最优方案并付诸工程实施。本项研究对采用无底柱分段崩落法回采的类似矿山具有一定的参考价值。 Based on the project of East of Xiaoguangzhuang Iron Mine, this paper presents a detailed analysis of the conditions of its underground pressure environment, the progress of mining and mining, the probable time of completion of mining and mining, the conditions for mining recovery, and the satisfaction of production requirements. Three kinds of mining programs, and using three-dimensional nonlinear finite element method to compare programs, the final proposed optimal program and put into engineering implementation. This study is of some reference value for similar mines that adopt the pillarless subsidence caving method.