根据大冶铁矿采用无底柱分段崩落法开采的情况 ,就其挂帮矿倾角缓、一端与露天坑相连的赋存特性 ,提出采用联合开采的方法 :挂帮矿的主体部分采用改进型分段空场法 ,靠近露天坑部分采用无底柱分段崩落法开采。使矿山现行的无底柱分段崩落法作业习惯、管理操作经验和原有的机械设备能得到充分利用 ,提高了矿石回收率 ,增强了生产的安全性。同时对改进型分段空场法在该矿进行了实施 According to the case of subsea subsidence caving mining in Daye Iron Mine, this paper puts forward the method of joint mining: the main part of Hupeng Mine adopts the improvement Type sub-field method, near the open pit part of the pillarless subsidence caving method. So that the current pillarless subsidence method of mine operating habits, management and operation experience and the original mechanical equipment can be fully utilized to improve the ore recovery, and enhance the safety of production. At the same time, an improved sub-field method is implemented in this mine