关键词: 协同开采, 硬岩铀矿, 堆浸铀尾渣, 含放射性废石, 充填, 固化堆排

Abstract: Based on the problems of low efficiency，high loss ratio，as well as difficult disposal of heap leaching uranium tailings and radioactive waste rocks in hard rock uranium deposits，combined with the concept of “synergetic mining”，a wasteless synergetic mining mode is proposed.The basic principal of the synergetic mining model can be described as the mining and heap leaching，mining and backfilling，backfilling and cemented discharge operations in time and space are synergetic by adjusting the layouts of stoping engineering，backfilling and disposal of tailings and waste rocks processes，as well as the corresponding engineering measures，so as to exploit uranium deposits and dispose of solid wastes effectively.The characteristics of the present upward horizontal slicing dry filling mining method，heap leaching and waste discharge process in a uranium mine in Northern Guangdong were analyzed.The tests of backfilling and discharging based on heap leaching uranium tailings were carried out，and the mining method was optimized.Then，the synergetic process of mining， backfilling and discharging was designed and its engineering application effects were evaluated.The study results indicate that the backfill with a cement-sand ratio of 1∶10 and 1∶14 and a mass fraction of 76% can meet the requirements of mechanized upward horizontal slicing cemented filling mining method and solidified discharge.After adopting this model， the stope productivity of the mine up to 135 t/d，while the stoping rate 88.86%.By the application of the synergetic mining model proposed in this paper，there is no discharge of radioactive waste rocks，and heap leaching uranium tailings can be effectively disposed through backfilling and solidified discharge.The economic benefits and environmental quality of the mine are obviously improved.

Key words: Synergetic mining, Hard rock uranium deposits, Heap leaching uranium tailings, Radioactive waste rocks, Filling, Solidified discharge