摘要
声发射技术在岩土工程等领域得到了广泛的应用,通常根据Kaiser效应测试岩石地应力,根据声发射事件的时空分布分析岩石内部损伤状态.介绍岩石中形成声发射的原理及表征参数,阐述Kaiser效应地应力测试和岩石破裂空间定位的原理及影响测试结果的主要因素,系统分析基于声发射表征参数的岩石损伤力学及分形特性的研究进展.针对目前岩石声发射的研究现状,指出Kaiser效应地应力测试、岩石声发射空间定位和岩石损伤力学等方面存在的问题,主要表现在Kaiser效应地应力测试点显现度的影响因素复杂,岩石破裂的声发射空间定位精度有待提升,基于声发射的岩石损伤机理认识不足及分形维数临界值难以统一.
Acoustic emission technology has been widely used in geotechnical engineering and other fields.Usually,the rock stress is tested according to the Kaiser effect,and the internal damage state of the rock is analyzed according to the temporal and spatial distribution of acoustic emission events.This paper introduces the principle and characterization parameters of acoustic emission in rock,expounds the principle of Kaiser effect insitu stress test and rock fracture space positioning and the main factors affecting the test results,and systematically analyzes the rock damage mechanics and fractal based on acoustic emission characterization parameters.In view of the current research status of rock acoustic emission,the problems in Kaiser effect insitu stress testing,rock acoustic emission spatial positioning and rock damage mechanics are pointed out.The main manifestations are that the influencing factors of Kaiser effect insitu stress test points are complex and rock fractures.The spatial positioning accuracy of acoustic emission needs to be improved.The understanding of rock damage mechanism based on acoustic emission is insufficient and the critical value of fractal dimension is difficult to be unified.
作者
刘建锋
LIU Jianfeng(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,Sichuan;College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,Sichuan)
出处
《四川师范大学学报（自然科学版）》
CAS
2021年第5期569-575,F0002,共8页
Journal of Sichuan Normal University（Natural Science）
基金
国家自然科学基金(U20A20266,51874202)
国家万人计划资助项目。
