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有底柱崩落法的采下矿石损失概可分为两部分,一部分损失在下盘,称之为下盘损失;另一部分损失在漏斗之间,称之为脊部损失。底柱漏斗的脊部损失还可于下阶段(或分段)部分回收,而下盘损失则不能回收。同时,就总体看来,随着向下开采,脊部损失也常常是转变为下盘损失形式而永久损失于地下。在矿石损失中,下盘损失占主要部分,特别是当矿体倾角不足和矿石层高度大时,应把减少矿石损失的主要着眼点放在减少下盘损失措施方面。
Bottom column caving mining ore loss can be divided into two parts, part of the loss in the next plate, called the lower plate loss; the other part of the loss between the funnel, called the ridge loss. Bottom column funnel ridge loss can also be recovered in the next stage (or section), while the loss of the lower disc can not be recovered. In the meantime, as a general rule, as the mining proceeds downward, the loss of the spine is also often transformed into a form of undercarriage which is permanently lost to the ground. In the ore loss, the lower part of the loss accounted for the main part, especially when the ore body inclination and ore height is not large, the main focus of the reduction of ore loss should focus on reducing the loss of the lower disk measures.