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(一)矿石损失与贫化概念 矿山开采中,平衡表内储量未采下或采下未放出而遗留于地下的矿量称为矿石损失。损失可分为开采损失与非开采损失,前者指留在采场未采下或虽已采下但未放出的矿石;后者系由于地质和水文地质因素及为保护井筒建筑物构筑物留的保安矿柱等。 为了从数量上反映出开采过程中矿石的变化程度,一般采用损失率表示。损失率是开采中损失的矿量或金属量与工业储量或金属量的百分比。 矿石损失用两个不同指标进行考核。一是用工业矿量损失率,又简称矿石损失率,用来计算采场、采矿队或工区的矿石损失。二是采用平衡表内矿量损失率,用来计算矿
(I) Concept of Loss and Dilution of Ore Mine In mining, the reserves in the balance sheet have not been mined or have been taken underground without being released. This is called ore loss. Losses can be divided into mining losses and non-mining losses. The former refers to the ore that was left in the stope but not tapped but not released. The latter was due to geological and hydrogeological factors and the security for the protection of wellbore structures Pillar and so on. In order to quantitatively reflect the degree of ore changes in the mining process, the general rate of loss expressed. The loss rate is the percentage of ore or metal lost to extraction or industrial reserves or metals. Ore loss assessment with two different indicators. First, the loss rate of industrial ore loss, also referred to as ore loss rate, used to calculate stope, mining team or work area ore loss. Second, the balance sheet mining loss rate, used to calculate the mine