Received Qi Copper Open Pit To Underground Mining To Open Up The System To Select Research

Though study on choosing the development system of Huogeqi copper mine in Inner Mongolia, This paper brings forward the whole financial net value (WNV ) method which can target the developing of the market and base on the goal of mining company . Using this method to decide the best scheme of transferring from open pit mining into underground mining in Huogeqi copper mine not only can deal with the feasibility of the scheme , but also can elude the risk of market.Main works and innovations of this paper are as follows:(1) Brings forward using the whole financial net value (WNV) method to decide the best scheme of transferring from open pit mining into underground mining in Huogeqi copper mine. 1834m scheme decided by WNV not only makes a maximal profit through making use of assets of the copper mine and catching hold of the opportunity given by market , but also it can provide enough time to finish the transferring and try to elude the risk of market.(2) Brings forward innovatively using 1810m sub-development level and surface facilities to mine the ore of boundary pillar, this method can operate smoothly in Huogeqi copper mine.(3) Though take a count of 3 calculational methods* we can make a conclusion that 1 millions tonnage per annum is reasonable, which also can leave space for next prospect.(4) Design a operative scheme which can carry out transferring from open pit mining into underground mining successfully.(5) Basing on facts of the copper mine , through project analogism we can get the thickness of boundary pillar is 24m and flow chart of transferring from open pit mining into underground mining in Huogeqi copper mine .