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尾矿砂二维非饱和渗流的实验研究
Experimental study on two-dimensional unsaturated seepage of tailings
投稿时间: 2016-12-05  最后修改时间: 2017-05-07
DOI:
中文关键词:  尾矿砂  非饱和渗流  含水率  粘聚力  内摩擦角
英文关键词:Tailing sand  Unsaturated seepage  Water content  Cohesion  Internal friction angle
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);国家杰出青年科学基金
作者单位E-mail
林雪松 辽宁工程技术大学理学院 lxs488@qq.com 
陈殿强 辽宁有色勘察研究院 dq111@qq.com 
王来贵 辽宁工程技术大学力学与工程学院  
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中文摘要:
      为研究尾矿砂非饱和渗流,通过自行设计的仪器进行了二维非饱和渗流实验,得到了实验中的基本现象和渗流稳定后含水率沿水平和竖直方向分布;利用直剪实验测试了非饱和尾矿砂抗剪强度参数与含水率关系;采用分析综合方法获取了非饱和尾矿砂抗剪强度参数的空间分布,并利用分析结果解释了非饱和渗流中的基本现象。研究结果表明:尾矿砂非饱和渗流中出现了明显的裂缝和错层;非饱和尾矿砂内沿水平和竖直方向含水率分布均近似服从指数规律;粘聚力随含水率的增加先增后减;内摩擦角随含水率的增加单调递减;抗剪强度参数具有空间分布特点;裂缝和错层源于抗剪强度参数的分布与变化。
英文摘要:
      To study unsaturated seepage of tailings, two-dimensional unsaturated seepage experiment of tailings was performed by using of self-designed apparatus, fundamental phenomenon of experiment and water content distribution in both horizontal and vertical directions in steady state were gained; relation between shear strength parameters of unsaturated tailings and water content was tested by direct shear test; spatial distribution of shear strength parameters of unsaturated tailings were obtained by method of analysis and synthesis, and the end of analysis and synthesis was used to explain fundamental phenomenon of the experiment. The results show that cracks and staggered floor are arise obviously in the experiment; distribution of water content of unsaturated tailings is like an exponential function in both horizontal and vertical directions; cohesion increase with water content first then decrease; internal friction angle decrease with water content; spatial distribution characteristics is owned by shear strength parameters; cracks and staggered floor are arise from distribution and change of shear strength parameters.
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