当前世界上有两种矿石工业指标体系。苏联、东欧和我国的工业指标一般由边界品位、最低工业品位、最低可采厚度与夹石剔除厚度等组成,称“多元指标”;欧美国家则由分采单元R寸及其边际品位两项指标组成,称为分采单元边际品位指标,即“单元指标”。 There are currently two kinds of ore industry index system in the world. The industrial indicators of the Soviet Union, Eastern Europe and China are generally composed of the boundary grade, the lowest industrial grade, the lowest recoverable thickness and the thickness of the clamped-out stone, and are called “multiple indicators.” In Europe and the United States, the R component and the marginal grade Indicators, called the sub-unit marginal grade index, that is, “unit index.”