分采分爆留矿法在赣南某铀矿地下采场浸出中的应用
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摘要
由于爆破矿石块度达不到设计要求、喷淋不均匀、矿堆出现淋浸死角等问题,使得赣南某铀矿采用的浅孔留矿筑堆浸出法铀浸出率偏低、浸出周期长、生产效率低。结合该铀矿开采的实际情况,对浅孔留矿筑堆浸出法做了改进,即根据物探编录结果,有选择性地对高、低品位矿石进行分爆分采,高品位矿石全部出窿地表堆浸,低品位矿石在地下采场浸出。这种改进后的方法被称为分采分爆留矿法。与浅孔留矿筑堆法相比,分采分爆留矿法铀的采场浸出总回收率提高了17.2%,从而最大限度回收了铀资源。
A shallow hole shrinkage mining stope leaching method was used to recover uranium in a uranium mine.The problems such as large blasting fragmentation and uneven distribution of drill lixiviant resulted in low leaching rate,long leaching cycle and low production efficiency during production.Aimed to problems and combined with the actual situation of the uranium mine,the shallow hole shrinkage mining method was improved,that is,according the results of geophysical logging,high grade ores and low grade ores were blasted and mined respectively,and the high grade ores were sent to the surface and treated by heap leaching process,and low grade ores were leached in stope.This improved method was called shrinkage mining method with respective blasting and mining.Compared with shallow hole shrinkage mining stope leaching method,the recovery rate of the improved method was increased by 17.2%,thereby maximizing the recovery of uranium resources.
A shallow hole shrinkage mining stope leaching method was used to recover uranium in a uranium mine.The problems such as large blasting fragmentation and uneven distribution of drill lixiviant resulted in low leaching rate,long leaching cycle and low production efficiency during production.Aimed to problems and combined with the actual situation of the uranium mine,the shallow hole shrinkage mining method was improved,that is,according the results of geophysical logging,high grade ores and low grade ores were blasted and mined respectively,and the high grade ores were sent to the surface and treated by heap leaching process,and low grade ores were leached in stope.This improved method was called shrinkage mining method with respective blasting and mining.Compared with shallow hole shrinkage mining stope leaching method,the recovery rate of the improved method was increased by 17.2%,thereby maximizing the recovery of uranium resources.
引文
[1]王昌汉.溶浸采铀(矿)[M].北京:原子能出版社,1998:2-4.
[2]张福星.赣南某铀矿低品位急倾斜薄矿体采矿方法的探讨[J].中国矿业,2012(S1):292-294.
[3]王小波,李广悦,谭臻,等.原地爆破浸出工艺的布液方法综述[J].铀矿冶,2003,22(3):113-116.
[4]王昌汉.铀矿床开采[M].北京:原子能出版社,1997:61-73.
[2]张福星.赣南某铀矿低品位急倾斜薄矿体采矿方法的探讨[J].中国矿业,2012(S1):292-294.
[3]王小波,李广悦,谭臻,等.原地爆破浸出工艺的布液方法综述[J].铀矿冶,2003,22(3):113-116.
[4]王昌汉.铀矿床开采[M].北京:原子能出版社,1997:61-73.