花岗岩型铀矿床的矿体池小而薄,形态复杂,矿化不均,品位一般较低,铀产品成本高。因此,要求勘探准确,开采工艺合理,管理制度严格,以保证开采贫化最小,经济效益最佳。目前,我国采用干式水平充填法开采的铀矿山,矿石贫化率一般在15％左右,个别薄矿脉开采中的贫化率达55.8％。 本文概述了产生矿石贫化的原因,并对矿石贫化作了经济分析。根据一些矿山的经验,提出了降低贫化的综合措施。 Granite-type uranium deposit ore pool is small and thin, complex, uneven mineralization, generally low grade, high cost of uranium products. Therefore, the requirements of accurate exploration, mining technology is reasonable, strict management system to ensure mining minimal depletion, the best economic benefits. At present, the depletion rate of ore mined by dry horizontal filling method is about 15% in our country, and the depletion rate of individual thin veins mining is 55.8%. This paper outlines the causes of ore depletion and provides an economic analysis of ore depletion. Based on the experience of some mines, comprehensive measures to reduce poverty have been put forward.