水利水电技术（中英文）

为加快尾矿泥浆的固结,提出自重排水固结联合生石灰固化处理方法。通过开展模型试验,分析尾矿泥浆体积含水量、土压力、孔隙水压力、含水量等参数的变化,综合评定得出排水管桩水平最佳影响范围,确定生石灰添加时机,并揭示生石灰固化机理。结果显示,直径为400 mm模型中的泥浆在自重排水作用下体积含水量、平均含水量降幅均较大,联合生石灰固化后体积含水量下降显著且十字剪切强度较大。由此推测铝土尾矿自重排水联合生石灰固化试验最佳水平影响范围为8倍排水管管径,在尾矿泥浆含水量为60%～70%时加入生石灰,其固化效果最好,且生石灰消解作用降低泥浆含水量是固化作用的关键。研究结果可为桂西地区工程实际应用自重排水联合生石灰固化技术时对排水管桩布置和添加生石灰时机的选取提供依据。

In order to accelerate the consolidation of bauxite tailings slurry, a method of self-weight drainage consolidation combined with quicklime solidification treatment is proposed herein. Through the relevant model experiment, the changes of the parameters, such as volumetric water content, soil pressure, pore water pressure, water content, etc., of the tailings slurry are analyzed, and then the horizontal best influencing range of the drain-pipe pile is obtained from the relevant comprehensive evaluation, while the quicklime adding time is determined and the solidification mechanism of quicklime is revealed as well. The study result shows that both the decreasing amplitudes of the volumetric water content and the mean water content of the slurry in the model with the diameter of 400 mm are larger, while the volumetric water content is significantly decreased along with a larger vane shear strength; from which it is speculated that the best horizontal influencing range of the experiment of the self-weight drainage consolidation combined with quicklime solidification for bauxite tailings is within the range of 8 times the drain-pipe diameter. The solidification effect is the best when quicklime is added during the tailing slurry water content of 60%～70%; for which decreasing the slurry water content with the digesting effect of quicklime is the key of the solidification effect. The study result can provide a basis for the layout of the drain-pipe piles and the selection of the time for adding quicklime during the actual engineering application of the technology of self-weight drainage consolidation combined with quicklime solidification to the relevant project in the region of Western Guangxi.