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梁冰*,吕志强,金佳旭,武鹏飞.排浆速度对尾矿沉积影响的模型试验研究[J].实验力学,2017,32(6):880~887
排浆速度对尾矿沉积影响的模型试验研究
Model Experimental Study of Effect of Slurry Draining Speed on Tailings Deposition
投稿时间: 2016-07-08  最后修改时间: 2016-11-20
DOI:10.7520/1001-4888-16-126
中文关键词:  模型试验  尾矿沉积  坡度  粗化现象  沉积判据
英文关键词:model experiment  tailings deposition  slope  coarsening phenomenon  sedimentary criterion
基金项目:国家自然科学基金资助项目(5157041488, 5150041215)
作者单位
梁冰* 辽宁工程技术大学 力学与工程学院, 辽宁阜新 123000 
吕志强 辽宁工程技术大学 力学与工程学院, 辽宁阜新 123000 
金佳旭 辽宁工程技术大学 土木与交通学院, 辽宁阜新 123000 
武鹏飞 辽宁工程技术大学 矿业学院, 辽宁阜新 123000 
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中文摘要:
      尾矿库中尾砂的沉积规律受颗粒级配、浆体浓度和排浆速度等因素的影响,其中排浆速度是影响尾矿沉积规律的主要因素之一。本文采用自行研制的水力分选粒度分析装置,对阜新同乃铁尾矿砂进行排浆速度分别为0.15cm/s、 0.30cm/s、 0.45cm/s的尾矿沉积模型试验。研究结果表明:(1)通过单粒尾矿砂临界状态分析,得到了尾矿颗粒运动-沉积临界速度关系和尾矿沉积判据,并通过试验验证其正确性。(2)沉积滩坡度随排浆速度的增加而减小,沉积池内的沉积坡度几乎不受排浆速度影响。(3)排浆速度越大,水平方向尾矿颗粒的分选性越好,以中值粒径为0.040mm代表,三种流速对应位置分别为61.4cm、 70.8cm和76.7cm。
英文摘要:
      Tailings deposition regular pattern in tailings pond is affected by the grain composition, slurry concentration and slurry draining speed and so on, in which, the slurry draining speed is one of main factors affecting the tailings deposition regular pattern. In this paper, taking iron ore tailings sand from Fuxin Tong Nai as samples, using self-developed hydraulic sorting granularity analysis device, a model experiment of tailings deposition regular pattern was carried out under the condition of slurry draining speed is 0.15cm/s, 0.30cm/s, 0.45cm/s respectively. Experimental results show: (1)Based on the analysis of single particle tailings critical state, relation between tailings particle movement and sedimentation speed and criterion of tailings deposition are obtained and verified by experiments. (2) The slope of deposition beach decreases with the increase of slurry draining speed, but slurry draining speed has little influence on slope of deposition pond. (3) The higher the slurry draining speed is, the better the tailings particle sorting along horizontal direction. Median diameter of tailings particle is 0.040mm. The locations corresponding to flow speed are 61.4cm, 70.8cm and 76.7cm, respectively; at three flow speeds, there is hierarchical structure in the vertical cross-section.
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