矿石的貧化損失計算工作,是矿山技术管理工作中的重要一环。多年来,因計算方法不够全面,在生产上未能发揮应有的作用。如湖南一些有色金属矿山,嫌間接計算法費人力較多和管理复杂,一般都不采用。而現用的直接法,也只能計算一次貧化和未釆下的矿石損失,对二次貧化和采下損失均未計算。为研究全面的計算方法和降低貧化損失的措施,湖南省有色金属管理局和某矿共同組織了試驗耝,在这个矿的一个矿块作了試驗,試驗效果良好:貧化率为58.8%,其中一次貧化率为54.1％;損失率为20.1％,其中一次損失率为12.6%;如以試驗結果的一次貧化損失与同脉历年結果比較,貧化率絕对值比1961年降低5.9%,比1962年降低24.8％,比1963年第一季 Mine depletion loss calculation work is an important part of mine technical management. Over the years, due to the calculation method is not comprehensive enough, failed to play its due role in production. For example, some non-ferrous metal mines in Hunan Province may suspect indirect man- agement costs and management complexity. Generally, they are not used. However, the current direct method can only calculate once depleted ore and unmixed ore loss, and does not calculate secondary depletion and mining losses. In order to study comprehensive calculation methods and measures to reduce depletion losses, Hunan Nonferrous Metals Authority and a mine jointly organized a trial 耝 to test a block in the mine with good experimental results: a depletion rate of 58.8% , Of which one was depleted at a rate of 54.1%, a 20.1% at a loss rate of 12.6%. The absolute value of the depletion rate was lower than that in 1961 5.9%, down 24.8% from 1962, compared with the first quarter of 1963