期刊论文

EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIORS OF TAILINGS UNDER DRYING-WETTING CYCLES

中文

工业建筑

1000-8993

2019

49

5

88-92,120

10.13204/j.gyjz201905016

国家自然科学基金项目（51774187,51804164）； 湖南省科技厅重点研发计划课题（2017SK2280）； 湖南省教育厅重点科研基金（17A184）； 湖南省自然科学基金项目（2018JJ3448）； 南华大学研究生科学基金项目（2018KYY152）；

本校为第一机构

采用三轴固结不排水试验,测试经历1~ 6次干湿循环后的尾矿试样的力学特性。通过对经过不同循环次数后试样的应力-应变关系、孔隙水压力和静强度的对比分析,探讨干湿循环作用对尾矿力学特性的影响规律。结果表明:经历不同次数干湿循环后尾矿的应力-应变曲线均呈明显的软化特征,随循环次数的增加,加载初期应力-应变线性增长程度在循环达3 ~ 4次后逐渐稳定,峰值应力所对应的应变量在3~ 4次循环时达到最大值;孔隙水压力峰值分别集中在经1、2、5次循环的试样,尾矿试样的剪缩趋势在此阶段明显加剧;尾矿的静强度在循环达到3次后逐渐稳定且有略微下降的趋势。干湿循环过程中水的反复作用导致了试样内部颗...

The consolidated undrained triaxial test was used to measure parameters of mechanical behaviors of tailing specimens after 1 to 6 drying-wetting cycles. The relationship of stress-strain, pore water pressure, static strength after different cycles were contrastively analyzed to discuss the effect of drying-wetting cycles on the mechanical behaviors of tailings specimens. The testing results showed that the relationship of stress-strain of tailings specimens were always in strain softening after the cycles, the linear growth at the initial stage of loading was gradually stabilized after 3 to 4 ...