关键词: 复杂空区, 残留矿体, 安全, 开采技术

Abstract: Based on analysis of the wall-rock falling law in mined-out area of Tuancheng Iron Mine，some research and practice on the recovery of falling residual ores in the edge of the active mined-out area，the monitoring and mining of multilevel residual ore-body in mined-out area，and the inclined platform mining method were made.This can resolve the mining technical difficulty in recovery of residual ore-bodies in complex mined-out area，which realized a great deal of residual ore recovery，kept the mining security without incident and extent the service life of mine.Meanwhile，good economic and social benefits have been achieved.

Key words: Complex mined-out area, Residual ore-body, Safety, Mining technique