摘要
利用自主研制的伺服三轴岩石力学试验机,在常温状态下,对石灰岩试样分别进行不同位移速率加载和不同应力速率加载条件下的三轴压缩试验。结果表明:在不同加载方式和加载速率条件下进行石灰岩的三轴压缩试验,石灰岩都经历了线弹性阶段,塑性强化段,破坏段等阶段;石灰岩试样的弹性模量随加载速率的增加而增大,应力加载速率对弹性模量的影响更为明显;不同应力加载速率及位移加载速率下,石灰岩的屈服应力及应变并未有明显的改变,峰值应力有小幅度增加,而应力速率加载对石灰岩的峰值应力的影响更显著。
The triaxial compression tests under different displacement loading rates and stress loading rates were carried out on the limestone samples at normal temperature by self-developed servo triaxial rock mechanics tester.The results showed that:the limestone samples in these tests all experienced linear elastic stage,plastic strengthening stage,failure stage and so on.The elastic modulus of the samples increased with the increase of loading rate,and the effect of stress loading rate on the elastic modulus was more obvious.Under different displacement loading rates and stress loading rates,the yield stress and strain of limestone had no obvious change,the peak stress had a small increase,and the effect of stress loading rate on the peak stress of limestone was more significant.
作者
李海琪
冯子军
LI Haiqi;FENG Zijun(Department of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Key Laboratory of In-situ Modified Mining,Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第4期52-56,共5页
Mining Research and Development
基金
国家自然科学基金资助项目(U1810104)
山西省高等学校创新人才支持计划资助项目(2018)。
关键词
石灰岩
三轴压缩
加载速率
力学性能
Limestone
Triaxial compression
Loading rate
Mechanical property
