长期技术决策的经济评价,对编制矿床开采设计和远景规划具有重大的实际意义。如果缺乏足够准确的有关将来时期的技术经济情报、矿床深部的原始地质资料又极不准确,加之研制评价方法(其中包括考虑风险程度)不够妥善,那么要想对设计开始之后15～25年乃至更长的远景时期作出充分可靠的经济评价是很难办到的。因为投资量大(多达几千万甚至几亿卢 The economic evaluation of long-term technical decision-making is of great practical significance for the preparation of prospecting design and long-term planning. Without adequate and accurate technical and economic information on future periods and the inaccurateness of the original geologic data in deep mineral deposits and the inadequacy of research and development methods (including consideration of the degree of risk), it is necessary to consider that after 15 to 25 years from the start of the design and even It is difficult to make a sufficiently reliable economic assessment in the longer term. Because of the large amount of investment (up to tens of millions or even hundreds of millions of rupees