Abstract: According to the occurrence condition of hanging wall ore,mining status,production cost of Lanyingxu mining area and concentrate market prices,the different economical computational models are established by adopting price method and reserve profitability comparative method,so as to analyze the boundary of open-pit mining and underground mining of the hanging wall ore of Lanyingxu mining area,the ore grade with recycling value and the market price with optimal economical benefits by carrying out open-pit to underground mining engineering.The study results show that,the economic reasonable tripping ratio is 6.81 t/t under influence of the market price of 340 yuan/t (iron concentrate) and 680 yuan/t (titanium concentrate);if the Fe3 ore can be mined separately by using open-pit hanging wall method, the economic reasonable stripping ratio should be lower than 3.07 t/t;if the underground mining method is adopted,the economical benefits cannot be significant either mining separately or mining with high grade(Fe1+Fe2) ores;if the open-pit to underground mining method is adopted,the market price of iron concentrate and titanium concentrate should be maintained to about 360 yuan/t and 800 yuan/t.The above study results can provide some reliable support for further making full of the hanging wall ore of the mine with high efficient and ideal economic benefit.

Key words: Lanyingxu mining area, Hanging wall ore, Economic reasonable stripping ratio, Market price,Economic characteristics