| Deposits of economic evaluation is based on each stage of mineral exploration data, through selecting appropriate technical and economic parameters, to estimated deposits economic benefits in the future of a certain period of time.Evaluated the value of the economic in industrial development and social benefits.In this paper, the Ji'an gold deposit was evaluated detailedJinchanggou mine in the Tianshan-Yinshan things with the new China Department of huge bulge with Interchange to the constructor. The performance of the regional basement structure of the residual east-west folds and fracture, especially fracture structure rather development. The gold distribution in the intrusive contact on both sides of the line inside and outside of the rock of diorite and Qinghe Group, which is strictly controlled by the north and south with its broom-like structure, derived of branch cracks fractured altered ore body to the vein. This work to calculate the deposit reserves (122b+333) ore153kt gold metal amount of580kg, the average gold grade is3.78×10-6.In Jinchanggou deposits hydrogeology, engineering geology, environmental and geological conditions are simple types, mining beneficiation process now used for a single flotation method, the main shaft of a blind shaft, the concentrator designed daily processing capacity of100tons, mineralsgold sulfide, the final product is a gold concentrate. In this Mine the original mode of production has been unable to meet the demand.This article proposed a new mine calculated in accordance with the program of100t/d, initially set300days at one year of working days, the mine's production capacity is30,000t/a, the infrastructure is takes two years, the final product is the gold concentrate. The proposed construction of mine needed funds as well as costs, taxes, Through summing up the gold price trend of the market estimated the price of fine gold, in order to calculate the sales revenue, make a dynamic evaluation of the proposed mine through a series of financial data Jinchanggou may the net present value of895.83million(>0), the internal rate of return is20.45%, the dynamic payback period of4.2years.The sensitivity analysis derived the greatest impact factor of the mining income is mine production capacity and selling price. Overall, the economic benefits of this proposed mine is still considerable. Mining area of the old facilities of Jinchanggou basically scrapped unavailable, rebuilt the construction of the mine need to put in some funds, and will take a long time before recycling interests. Mining areas is far away from the residential area, but due to the mining area near agricultural land, people need to pay attention to the construction of the tailings, to focus on the development of the ecological balance.Should be noted that the results of the assessment is not included in the cost of the mining right transfer fee, which means that the free transfer to the mining enterprises, or mergers and acquisitions, mining, is worthy of development value, but if the mineral rights transfer fee included inthe initial investment, the mine is not much room for profit. |
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