尾砂胶结充填体固结后强度激发特性研究

发布时间：2019-05-27 14:33

【摘要】：以新城金矿分级尾砂和新城水泥为原材料,制作浓度为70%,灰砂比为1∶10的试块,对不同养护龄期的充填体试块进行侧限条件下压缩固结试验,研究了侧限高应力固结对不同龄期充填体单轴抗压强度的影响,以及不同固结应力对充填体强度的影响,分析了固结后不同强度激发期对充填体单轴抗压强度的影响规律。研究结果表明:侧限高应力(25.5 MPa)固结后,充填体强度有了显著增强,侧限高应力固结对充填体强度随固结后养护时间的增长具有显著的激发作用,14 d、28 d充填体固结后强度呈指数增长,而56 d充填体固结后强度呈对数增长,同时侧限固结对于充填体强度的激发作用还与固结过程中最大侧限固结应力有密切关系。
[Abstract]:Taking the graded tailings and Xincheng cement of Xincheng Gold Mine as raw materials, the test blocks with concentration of 70% and ash / sand ratio of 1:10 were used to carry out compression consolidation tests under side limit conditions for filling blocks of different curing ages. The effect of side limit high stress consolidation on uniaxial compressive strength of filling body at different ages and the effect of different consolidation stress on the strength of filling body are studied. The influence of different strength excitation period on uniaxial compressive strength of filling body after consolidation is analyzed. The results show that the strength of the filling body is significantly enhanced after the consolidation of the side limit high stress (25.5 MPa), and the consolidation of the side limit high stress has a significant excitation effect on the strength of the filling body with the increase of curing time after consolidation, 14 days. At the same time, the excitation effect of side limit consolidation on the strength of filling body is closely related to the maximum lateral consolidation stress in the process of consolidation, while the strength of filling body increases exponential after consolidation at 28 d and logarithmic after consolidation at 56 d. At the same time, the excitation effect of side limit consolidation on the strength of filling body is closely related to the maximum lateral consolidation stress in the process of consolidation.
【作者单位】：北京科技大学土木与资源工程学院;北京市信息服务工程重点实验室;北京矿冶研究总院;
【基金】：“十二五”国家科技支撑计划项目(编号:2012BAB08B01) 国家自然科学基金项目(编号:51641401)
【分类号】：TD853.34;TD863

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