在苏联黑色冶金矿山行业的细则中,推荐以方案比较法和最大利润法进行技术经济计算来确定矿石损失的额定量。该方法费力、不准确,因为所采用的原始数据是大概的数值,而且方法还是形式化的,所以推荐的矿石损失量不能经常符合矿石与围岩接触带内有用成分含量的条件。从接触带采出的矿石金属含量不低于废品界限时才能运往工厂,所以接触带的位置 In the rules of the Soviet Union’s black metallurgical and mining industry, a technical and economic calculation based on the plan comparison method and the maximum profit method is recommended to determine the nominal amount of ore loss. The method is laborious and inaccurate because the raw data used is approximate and the method is formalized so that the recommended ore loss can not always be in line with the content of the useful constituents in the contact zone between the ore and the surrounding rock. From the contact zone mining of ore metal content of not less than the scrap limit can be shipped to the factory, so the location of the contact zone