工程科学学报2018，Vol.40Issue(2)：159-166,8.DOI:10.13374/j.issn2095-9389.2018.02.005
不同孔隙比下风化壳淋积型稀土矿强度特性
Strength characteristics of weathered crust elution-deposited rare earthores with differ-ent porosity ratios
摘要
Abstract
The porosity ration of weathered crust elution-deposited rare earth ores is the main factor that affects the leaching results and the stability of the ore body. To determine the strength characteristics of weathered crust elution-deposited rare earth ores under dif-ferent porosity ratios, six groups of rare earth minerals were reconstituted, and direct shear tests were performed for different samples. The effect of pore evolution on the shear strength of the orebody was studied, and the mechanism of the influence of porosity ratio on co-hesion and internal friction angle was revealed. The results show that the unsaturated rare earth ores with different porosity ratios corre-spond to different shear strengths. The relation between shear stress and shear displacement was summarized as parabolic type based on the experimental data, and the relation between the porosity ratio and the shear strength index was established. The mechanism analysis shows that with an increase in the porosity ratio, the effect of the bonded water film effect gradually weakens, the number of the contact points reduces, and the shear strength of the minerals reduces.关键词
风化壳淋积型稀土/孔隙比/影响机制/抗剪强度指标Key words
weathered crust elution-deposited rare earth/porosity ratio/influence mechanism/shear strength index分类
矿业与冶金引用本文复制引用
尹升华,齐炎,谢芳芳,陈勋,王雷鸣..不同孔隙比下风化壳淋积型稀土矿强度特性[J].工程科学学报,2018,40(2):159-166,8.基金项目
国家自然科学基金重点资助项目( 51734001 ) （ 51734001 ）
国家优秀青年科学基金资助项目( 51722401 ) （ 51722401 ）
国家重点研发计划资助项目(2016YFC0600704) （2016YFC0600704）
