利用岩石声发射Kaiser效应测试地应力的方法研究  

Study on the method of in-situ stress measurement with Kaiser effect of rock acoustic emission

作　　者：张昕[1] 付小敏[1] 沈忠[1] 黄兴建[1] 

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),四川成都610059

出　　处：《中国测试》2017年第10期18-23,共6页China Measurement & Test

基　　金：国家自然科学基金项目(41272321)

摘　　要：利用岩石声发射Kaiser效应在室内测试地应力的原理及测试方法,对岩石块体空间6个方向的试件进行单轴压缩荷载作用下的声发射测试。通过对试验数据的处理,分析能量-时间曲线以选定多级Kaiser效应特征点,即多级应力分量。运用弹性力学理论及自编程序,对空间6个方向的多级应力分量进行自由组合计算地应力,结合取样现场的地质环境综合确定地应力的大小及方向。研究成果对于完善室内测试地应力以及提高确定地应力的准确度有所帮助。In this paper,using the principle and test method of in-situ stress measurementin the laboratory with the Kaiser effect of rock acoustic emission（AE）, AE test of rock specimen in six directions is carried out under uniaxial compression. Based on test data processing,and analyzing the energy-time curve to select the multi-level Kaiser effect feature points,namely multi-level stress components. By using the theory of elastic mechanics and self programming, the in-situ stress is calculated by the free combination of the multi-level stress components in the six directions of the space,and combined with the geological environment of the sampling site to determine the magnitude and direction of in-situ stress. The research results are of great significance to complete in-situ stress measurementin the laboratory and improve the accuracy of the determination of in-situ stress.

关 键 词：地应力 Kaiser效应特征点 岩石声发射 

分 类 号：TU452[建筑科学—岩土工程]