循环加卸载下尾砂胶结充填体能量变化特征的试验研究与分析.doc

循环加卸载下尾砂胶结充填体能量变化特征的试验研究与分析.doc循环加卸载下尾砂胶结充填体能量变化特征的试验研究与分析
摘要: 为了探求尾砂胶结充填体在循环加卸载下能量的变化特征,利用电液伺服试验机对分级尾砂胶结充填体进行了单轴循环加卸载试验。绘制出尾砂胶结充填体在循环加卸载条件下的全应力应变曲线,探讨了单位体积能,弹性应变能以及滞回环与循环周次,应力水平之间的关系,并分析尾砂胶结充填体的单位体积能,弹性应变能,以及滞回环在单调加载和循环加卸载条件下的演化规律,旨在通过对胶结充填体在复杂环境下力学性能及损伤机理的研究,从能量的角度探明造成充填体损伤失稳破坏的因素,为矿山选择充填材料、优化充填体,以及对充填体稳定性分析提供重要依据。
Abstract: In order to explore the characteristics of energy variation of tailings cemented body under cyclic loading and unloading, the uniaxial cyclic loading and unloading tests of graded tailings cemented fillings were carried out by electro-hydraulic servo testing machine. The full stress-strain curves of tailings-filled cements under cyclic loading and unloading conditions are plotted, and the relationship between unit volume energy, elastic strain energy and hysteresis loops is also discussed. Elastic strain energy, and the evolution of hysteresis loops under monotonic loading and cyclic loading and unloading conditions. The aim of this study is to study the mechanical properties and damage mechanism of cemented fillers plex environments, and from the angle of energy, the factors that cause the destabilization failure of the filling body are explored, which provide the important basis for selecting the filling material, optimizing the filling body and t
he stability analysis of the filling body.
关键词: 尾砂胶结充填体;能量;滞回环;损伤
Key words: tailings cemented filling body;energy;hysteresis lo