Strength and failure characteristics of brittle jointed rock-like specimens under uniaxial compression:Digital speckle technology and a particle mechanics approach

查看全文 作　　者：Rihong [1]Cao;Hang [1,2]Lin;Ping [1]Cao

机构地区：[1]School of Resources and Safety Engineering, Central South University;[2]State Key Laboratory for Geo Mechanics and Deep Underground Engineering, China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》索引2018年第28卷第4期,共9页

基　　金：funding from Project (Nos.51474249 and 51404179) supported by National Natural Science Foundation of China;Project Supported by Innovation Driven Plan of Central South University of China (No.2016CX019);Project (No. SKLGDUEK1405) funded by the Open Projects of State Key Laboratory for Geo-mechanics and Deep Underground Engineering of China University of Mining and Technology,in China 摘　　要：The strength and failure characteristics of most natural rock mass are influenced by discontinues such as fissures, joints, and weak surfaces. In the present study, the strength and failure behavior of ubiquitousjoint rock-like specimens under uniaxial loading have been investigated by DIC(digital image correlation) and discrete element numerical method(PFC2 D). The results are obtained. Firstly, the UCSJof specimens with c = 15° or 30° shows similar tendency while a goes from 0° to 75°. With c = 45° or 60°, the UCSJof specimens increases when a goes from 0° to 30° and decreases after a goes beyond 30°. With c = 75°, the peak UCSJvalue is reached when a = 0°. The UCSJvalue shows an increasing trend when a goes from 60° to 75°. Secondly, the ubiquitous-joint specimens present different failure modes for various levels of a and c(b-a). Based on the experimental results, the failure mode of ubiquitous-joint specimens can be classified into three categories: stepped path failure, failure through parallel plane, and failure through cross plane. 关键词：标本粒子力学特征单轴技术点缀岩石连接

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Strength and failure characteristics of brittle jointed rock-like specimens under uniaxial compression:Digital speckle technology and a particle mechanics approach

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