期刊论文

Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression

Cao, Ping(pcao_csu@sina.com)

中文

工程科学学报

2095-9389

2017

39

4

494-501

10.13374/j.issn2095-9389.2017.04.003

国家自然科学基金资助项目（10972238）； 中南大学硕士生自主探索创新项目（2016zzts448）；

本校为其他机构

通过预制张开节理类岩石试件,在单轴压缩条件下,研究节理密度及倾角的组合作用对试件强度和变形特征的影响. 试验结果表明: (1)随着节理倾角的增大,应力--应变曲线由多峰值转变为单峰值,试件脆性增强,延性减弱; (2)节理密度对当量峰值强度的影响与节理倾角大小有关,对当量弹模的影响呈“V”形变化,即当量弹模随着节理密度的增大呈现先减小后增大的变化规律; (3)当量弹模随节理倾角的增大而增大,在节理倾角为90°的时候达到最大值,为完整试件弹性模量的70% ~ 80%; (4)节理倾角对多节理类岩石试件当量峰值强度和当量弹性模量的影响大于节理密度的影响. 对试验结果进一步分析发现: 节理密度及节理倾...

The effects of the combination of joint density and inclination on the strength and deformation characteristics of rock-like specimens containing open joints were studied by using uniaxial compression tests. The following conclusions were made: with the increase of joint inclination, the stress-strain curve changes from a multi-peak value to a single peak value and the brittleness of the specimen enhances, whereas the ductility of the specimen weakens. The influence of joint density on the unified peak strength is related to the size of joint i...