个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
其他任职:国际岩石力学与岩石工程学会(ISRM)中国国家小组副主席
性别:男
毕业院校:东北大学
学位:博士
所在单位:土木工程系
办公地点:综合实验四号楼330
联系方式:tca@mail.neu.edu.cn
Study of acoustic emission characteristics of limestone under cycle uniaxial loading-unloading perturbation
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论文类型:期刊论文
发表时间:2011-09-01
发表刊物:Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
收录刊物:EI、PKU、ISTIC、Scopus
卷号:30
期号:SUPPL. 2
页面范围:3871-3877
ISSN号:10006915
摘要:Take limestone samples from metro Line 2 as research objects, and study acoustic emission(AE) characteristics under uniaxial cyclic load-unload disturbance, which simulate the traffic load disturbance, then carry out numerical simulation of rock failure process under load-unload by RFPA2D. The results confirmed the existence of Kaiser effect of such limestone, also confirmed the existence of Felicity effect under loading-unloading. Loading and unloading theory will be applied to the rock acoustic emission precursor analysis, taken the Y value(load/unload response ratio, LURR) reach(close) to 1as a precursor of failure characteristics of such rock. The AE energy of such stone accelerated release obviously. The numerical simulation shows evident Kaiser effect, and the corresponding AE event vividly. The comparison of the results of simulation and tests shows that, the two are the most closed when the coefficient of homogeneity m is 5. The results are expected to provide basis for construction safety and to avoid geological disaster in the underground works.