摘要
深部岩石动态力学实验研究是深部岩石工程中的重点和难点。近年来,国内外学者利用围压霍普金森压杆在岩石动态力学实验研究中取得了丰硕的成果,系统地回顾和总结这些成果是十分有必要的。以围压霍普金森压杆深部岩石动态力学性质实验研究为主线,论述在实验装置、实验方法及实验结果等方面的最新进展。首先,介绍分离式霍普金森压杆的基本原理以及与其配套的动能陷阱技术;随后介绍用于深部岩石动力测试的围压分离式霍普金森压杆的发展进程,并系统讨论围压(轴向围压、静水围压、三轴围压)条件下岩石的动态压缩、拉伸、弯曲、剪切强度的实验方法及动态响应特性,总结深部岩石动态力学强度率相关性的结果并探讨其机制;接着介绍围压条件下岩石I型、II型动态断裂韧度的测试方法及实验结果。
Experimental study in deep rock dynamics is an important but challenging direction for deep underground rock engineering.Recently,great advances have been made by researchers in the experimental studies of deep rock dynamic properties using the split Hopkinson pressure bar(SHPB)with confinement.It is thus imperative to systematically review the progress in this direction.This paper mainly focuses on the experimental study of deep rock dynamics using SHPB with confinement,including new advances in experimental apparatuses,methodologies and results.First of all,a comprehensive introduction to the working principles of the spilt Hopkinson pressure bar and the momentum-trap technique is given.Secondly,the development of SHPB with confinement utilized for conducting deep rock dynamics tests is briefly presented.Moreover,the experimental methods for determining dynamic compressive,tensile,bending and shear strengths of rock under confinement including axial,hydrostatic and triaxial pressures are systematically discussed,and the corresponding dynamical responses of rock in these tests are also revealed.The rate-dependence characteristics of dynamic strengths for deep rock are summarized and the mechanisms are then discussed.Besides,the experimental methods and results for quantifying the dynamic Mode I and Mode II fracture toughness are also presented.
作者
夏开文
王帅
徐颖
陈荣
吴帮标
XIA Kaiwen;WANG Shuai;XU Ying;CHEN Rong;WU Bangbiao(State Key Laboratory of flydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;Department of Civil and Mineral Engineering,University of Toronto,Toronto,M5S 1A4,Canada;College of Science,National University of Defense Technology,Changsha,Hunan 410073,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2021年第3期448-475,共28页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51879184)
国家自然科学基金青年基金资助项目(51704211)。
关键词
岩石力学
围压分离式霍普金森压杆
动态强度
动态断裂韧度
rock mechanics
split Hopkinson pressure bar with confinement
dynamic strength
dynamic fracture tough ness
作者简介
夏开文(1973-),男,2005年于美国加州理工学院机械工程专业获博士学位,现任教授、博士生导师,主要从事岩石动力学和地震物理方面的研究工作。E-mail:kaiwen@tju.edu.cn;通讯作者:徐颖(1987-),女,博士,现任副教授。E-mail:maggie_xu@tju.edu.cn。
