Abstract: In order to make full development of the remaining resources of I Area in Dongshan Iron Mine,the development feasibility of the remaining resources of I Area is discussed from the two aspects of openpit mining and underground mining.The results show that stripping ratio of openpit mining scheme are 701,743 m3/m3,and they are larger than the economic reasonable stripping ratio (571 m3/m3),so the openpit mining scheme is economically irrational,and the safety and stability of slope cannot be guaranteed by implementing the scheme;the investment of underground mining scheme is large,the aftertax investment payback period is longer than mine service duration,which indicated that the economic benefits of underground mining scheme is not obvious.The comprehensive analysis results further show that under the current market situations and economic and technical conditions,the remaining resources of I Area in Dongshan Iorn Mine cannot be developed temporarily.When the market situation is getting better and the economic and technical conditions are available,the remaining resources of I Area in Dongshan Iorn Mine can be developed.

Key words: Remaining resources, Openpit mining, Underground mining, Slope stability