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我省目前地下金属矿山按矿石产量计留矿法比重约占70％左右,其中根据矿床赋存特点和具体开采条件而采用变形留矿法的矿山亦为数不少。宏观来看,“标准的”与“变形的”留矿法方案虽然都在某种特殊条件下解决了若干实际问题而有可取之处,但有一个实际问题迄今未被人们重视。留矿法采下矿石,不论矿块底部结构形式如何,大量放矿结束后总有若干数量矿石残留于底柱之上。这些残矿损失数量不清,价值未计,长期以来一直划作永久损失。研究和解决这一问题,进一步提高矿石回收率是撰写本文宗旨。
At present, the underground metal mines in our province account for about 70% of the total amount of ore retained by the ore production method. There are also a large number of mines that adopt the deformation and retention method according to the deposit characteristics and specific mining conditions. From a macro point of view, both the “standard” and “deformed” methods of retaining mineral deposits have merit in solving some practical problems in some special conditions. However, a practical problem has not been valued by people so far. Mineral retained mining ore, no matter how the structure of the bottom of the block, a large number of ore after the end of the total number of ore remaining on the top of the column. The number of these residuals is unclear, of undemanding value, and has been delineated as a permanent loss for a long time. Research and solve this problem, to further improve ore recovery is the purpose of writing this article.