[en] The original design of main parameters of mine production effluent and mine water is that uranium concentration is below 0.3 mg/L, the radium activity concentration is less than 1.1 Bq/L with 5 or more times receiving water dilution, uranium concentration can meet the requirement of 0.05 mg/L discharge standard. By developing and improving process technology, the production effluent of the mine is neutralized with lime cream and barium chloride precipitation, and neutralization of pH is over 10; the mine water is adsorbed by ion exchange resin, then elution of loaded uranium resin is by acidified sodium chloride solution, the uranium concentration in the process waster water is below 0.05 mg/L discharge standard as well as the impurities of radium, manganese and fluorine concentration also meet discharge standard. (authors)

[en] Stope leaching of uranium mining method compared with the conventional method, has the advantages of low investment, high efficiency and long mine (waste) stone reduced about 70%, less pollution, more suitable for the need of low cost uranium deposit mining. In recent years, with the deepening of mining, due to blasting heap, heap leaching of ore block, corner, pipe network and other key technical parameters of stope leaching of uranium stope limit, the heap appears low leaching rate, leaching cycle is long, the backlog of enterprise funds fatal weakness, affect the development of enterprises. In this paper, aiming at the existing problems of stope leaching, combined with the actual situation of a uranium mining, with the explosion of shrinkage method for optimization of stope leaching technology, reasonable and improve the recovery rate of resources, as the capacity to find a new breakthrough in uranium. (authors)

[en] 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. (authors)