>> 自然科学版期刊 >> 2007年04期 >> 正文
岩石双轴压缩试验及装置研究进展
供稿: 张庆;侯爱军;贠小有;杨小林 时间: 2019-05-06 次数:

作者:张庆;侯爱军;贠小有;杨小林

作者单位:河南理工大学土木工程学院洛阳理工学院麦吉尔大学采矿工程系

摘要:综述岩石双轴压缩研究的试验方法、试验设备和研究成果,指出大部分现有的破坏准则忽视了中间主应力的影响,选用试件尺寸太小以致无法充分考虑尺寸效应,加载头与试件受压面之间存在的摩擦力影响试件破坏形态.河南理工大学和加拿大麦吉尔大学合作设计建造的大吨位等刚度双向加载系统采用柔性加载头,克服了加载过程中加载头与试件间的摩擦力对试件破坏形态的影响,且能对较大尺寸试件进行单、双轴压缩试验.利用该装置对各种岩石材料开展系统的试验研究,有望弥补目前国际岩石力学界对双向受力状态下岩石破坏机理认识的不足.

基金:河南省杰出科研人才工程(2006KYCX012);

关键词:岩石双向加载;中间主应力;双轴强度;等刚度双向加载系统;

DOI:10.16186/j.cnki.1673-9787.2007.04.003

分类号:TD315

Research progress in biaxial compression investigation and apparatus of rock material

Abstract:Biaxial compressive test apparatus, test techniques and test results of rock materials are reviewed in the paper, and pointed out shortcomings such as most current failure criteria ignore the affection of intermediate principal stress, samples too small to assess the scale effects and the friction between the loading platen and sample which affects the failure mode of sample.In order to eliminate the limitations of the previous apparatus, a new Isotropic Biaxially Loading System (IBLS) which has higher loading capacity than previous apparatus has been designed and is being established by Henan Polytechnic University of China and McGill University of Canada.Steel brush platens will be employed in the IBLS to eliminate the influence of friction between the loaded surfaces of the rock specimen and loading platens, and IBLS can be used to uinaxially and biaxially investigate bigger samples than previous investigations.The investigation results by IBLS might amend the shortages of realization for the strength behavior and failure mechanism of rock material under biaxial compression.

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