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作 者:赵怡晴 汪杰[1,2] 钟士照[1,2] 缪俊容 ZHAO Yiqing;WANG Jie;ZHONG Shizhao;MIAO Junrong(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,University of Science and Technology Beijing,Beijing 100083,China)
机构地区:[1]北京科技大学土木与资源工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083
出 处:《矿业研究与开发》2023年第2期157-162,共6页Mining Research and Development
基 金:国家自然科学基金资助项目(51804018)。
摘 要:为研究降雨条件下尾矿库浸润线的变化规律和坝体的变形状况,在室内进行尾矿库模型降雨试验,借助测压管测量降雨过程中浸润线的变化,利用数字图像相关技术(Digital Image Correlation, DIC)获取坝体的位移变化。研究结果表明:坡面附近的位移随时间的变化规律与浸润线随时间的变化规律基本一致,降雨前期变化迅速,达到峰值后,基本不再变化;3种坡比尾矿库浸润线变化趋势相同,但坡比越大,浸润线越高,位移变化量也越大,说明浸润线高更容易引起坝体的不稳定;随着降雨的持续,尾矿库的表观位移由均匀变化向非均匀变化转变,浸润线以下位移变化较小,浸润线以上位移变化明显,坡面附近位移变化最大。In order to study the variation law of the saturation line and the deformation of the dam body under the condition of rainfall, the rainfall test of the tailings pond model was carried out in the laboratory. The saturation line changes during rainfall were measured by means of a pressure tube, and the displacement variation of the dam body was obtained by Digital Image Correlation(DIC). The results show that the displacement variation near the slope is basically fitting the variation of saturation line with time. The variation is rapid in the early rainfall period, and basically does not change after reaching the peak value. The variation trend of the saturation line of the three kinds of tailing ponds is the same, but with the increase of slope ratio, the saturation line is higher and the displacement change is larger. It is find that the high saturation line is more likely to cause the instability of the dam body. As the rainfall continues, the apparent displacement variation of tailings pond changes from uniform to non-uniform. The displacement variation is small below the saturation line, is obvious above the saturation line, and reaches the largest near the slope.
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