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一、前言通常,在进行矿床开采的可行性研究时,是把整个矿床看作一个整体而进行评价的。实际上即使在一个矿床内部,各个矿体或一个矿体的各个部分的开采经济效益也是不同的。一般来说,接近地表的上部矿体较易开采,经济效益也高;越往深部开采越困难,能耗也越大。因此,客观上存在一个开采深度的极限,如果矿产品价格不提高,国家又不给额外补贴,开采超过极限深度的矿石就会成为得不偿失的事情。这样,进行分中段的投入、产出分析以确定
I. Preface Usually, the feasibility of deposit mining is usually evaluated by considering the whole deposit as a whole. In fact, even within a deposit, the economic benefits of extraction from various ore bodies or parts of an ore body are different. In general, the upper ore body close to the surface is more likely to be mined and the economic benefits are also higher; the more it goes to deeper mines, the greater the energy consumption. Therefore, objectively, there is a limit to the depth of exploitation. If the prices of mineral products do not increase and the state refrains from giving any additional subsidies, the exploitation of ore beyond the limit depth will be worth the candle. In this way, sub-middle of the input, output analysis to determine