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我国矿业界在进行矿体圈定、储量计算、矿石和废石区分等各项工作时,惯于沿用苏联做法,采用双重品位指标,即在使用最低工业品位的同时,还规定了一个边界品位。到底这双重指标起什么作用?边界品位是怎么个含义?看来须要解放思想,做一番回顾和探讨。(一)有人认为,在最低工业品位之外,另订一个边界品位指标,为的是尽可能利用低品位资源。问题在于,最低工业品位是否经济
The Chinese mining industry is accustomed to following the Soviet Union’s practices in carrying out various tasks such as delineation of ore bodies, calculation of reserves, distinction of ore and waste rock, and adopts the dual grade index, which stipulates a boundary grade while using the lowest industrial grade. What is the role of this dual indicator? What is the meaning of the boundary grade? There seems to be a need to emancipate the mind and do some review and discussion. (A) Some people think that in addition to the minimum industrial grade, another boundary grade index is set in order to make the best use of low grade resources. The question is whether the lowest industrial grade is economical