矿产资源是国家极为宝贵的财富,是社会主义建设的重要物质基础。千方百计地降低矿石的损失和贫化,对充分利用国家矿产资源、延长矿山服务年限、提高原矿质量和全面完成国家计划等,都有着极大的和现实的意义。贫化率和损失率的高低,是检查采矿工作好坏的二个主要指标。正确地选择计算方法是非常重要的,因为它可以指导生产实践和提高矿山管理的水平。 Mineral resources is a very precious asset for the country and an important material basis for socialist construction. By doing everything possible to reduce the loss and depletion of ores, it is of tremendous and realistic significance to make full use of the country’s mineral resources, extend the service life of the mines, improve the quality of the mines and fully complete the state plans. The level of depletion and loss is the two main indicators of the quality of mining work. Correct choice of calculation method is very important, because it can guide the production practice and improve the level of mine management.