单轴压缩条件下岩石声发射特征研究  

Laboratory Investigation on Acoustic Emission Characteristic of Intact Rock Samples Under Uniaxial Compression Condition

作　　者：陈雪萍 葛娟 陈忠清 高鑫 CHEN Xueping;GE Juan;CHEN Zhongqing;GAO Xin(School of Civil Engineering,Shaoxing University,Shaoxing 312000;Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province,Shaoxing 312000;Shanghai Zhongliang Real Estate Group Co.Ltd.,Shanghai 200331)

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000 [3]上海中梁地产集团有限公司,上海200331

出　　处：《土工基础》2021年第4期507-509,共3页Soil Engineering and Foundation

基　　金：浙江省公益技术应用研究计划项目(No.2016C33052)。

摘　　要：选取浙江地区的四种典型岩石(玄武岩、砂岩、灰岩及凝灰岩),进行了一系列岩石室内单轴压缩试验,开展岩石压缩破坏全过程的声发射特征研究。结果表明,灰岩与砂岩在单轴压缩条件下破坏产生的声发射特征相似,大量的声发射事件主要在岩石接近破坏时发生,与凝灰岩、玄武岩的声发射特征明显不同;凝灰岩在岩石压应力接近0.4倍峰值强度时,声发射事件增加较明显,并在岩石接近破坏时大量发生;而玄武岩则在岩石发生破坏前的全过程中产生大量声发射事件,声发射呈现出较明显的台阶式递进上升变化特征。研究结果可为浙江地区岩质滑坡声发射监测预警提供参考。A series of uniaxial compression tests were performed on four types of typical intact rock core samples(basalt,sandstone,limestone and tuff)in Zhejiang area to investigation the acoustic emission in the entire rock compression tests process.The results show that(1)the acoustic emission characteristics of limestone and sandstone under the uniaxial compression are similar,and a large number of acoustic emission events mainly occur when the rock is close to the failure,which is significantly different from the acoustic emission characteristics of tuff and basalt rock samples;(2)when the compressive stress of tuff is close to 0.4 times the peak compressive strength,the acoustic emission events increase more obviously,and occur in large amounts when the rock sample is close to failure;(3)a large number of acoustic emission events occur in the entire process before the failure of basalt,and a more obvious step-by-step progressive ascending change feature is shown.The research results can provide a reference for the acoustic emission monitoring and the early warning of rock landslides in Zhejiang area.

关 键 词：声发射 单轴压缩试验 岩石 累计振铃计数 累计能量 

分 类 号：TU573[建筑科学—建筑技术科学]