Abstract: The traditional underground mining methods to exploit the hanging wall ore on the slope of the open pit usually result in poor stability and low efficiency of the final slope and the underground stope because of the special occurrence conditions of the hanging wall ore in the open pit.Then，the pillarless ore-remaining subsequent fill mining with low stage height is put forward to exploit the hanging wall ore on the final slope of the open pit.This method shortens the height of the stages in order to reduce the exposure area of the stope.It has a higher efficiency by obligating no bottom pillar and blasting with deep hole and transporting the ore with scrapers.And by using this method，the deformation of the rock mass is limited temporarily with partial ore remaining in the stope and filling the goaf.In this method，the top inclined pillars are designed to improve the filling effect.This method was put into the exploitation of JianⅠN hanging wall ore of the east open pit in Daye Iron Mine.The application result showed that it guaranteed the stability of the final slope and the safe exploitation of the hanging wall ore at the stope，and effectively recovered the ores on the final slope of open pit under the conditions of keeping the safety pillars between reserved stope and the slope.

Key words: Mining method, Iron mine, Hanging wall ore, Safety