土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (4): 507-509.

• 测试技术 • 上一篇    下一篇

单轴压缩条件下岩石声发射特征研究

陈雪萍1,葛 娟1,陈忠清1,2,高 鑫3   

  1. （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）
  • 收稿日期:2020-04-29 修回日期:2020-05-08 出版日期:2021-08-31 发布日期:2021-08-20
  • 通讯作者: 陈忠清(1984-)，男，博士，讲师，研究方向为岩土工程及工程地质。
  • 作者简介:陈雪萍(1998-)，女，本科生，研究方向为土木工程。
  • 基金资助:
    浙江省公益技术应用研究计划项目(No. 2016C33052)

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

CHEN Xueping1, GE Juan1, CHEN Zhongqing1,2, GAO Xin3   

  1. (1.School of Civil Engineering, Shaoxing University, Shaoxing 312000;
    2.Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing 312000;
    3.Shanghai Zhongliang Real Estate Group Co. Ltd., Shanghai 200331)
  • Received:2020-04-29 Revised:2020-05-08 Online:2021-08-31 Published:2021-08-20

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。

关键词: 声发射, 单轴压缩试验, 岩石, 累计振铃计数, 累计能量

Abstract: 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.

Key words: Acoustic Emission, Uniaxial Compression Test, Intact Rock Samples, Cumulative Ring Counts, Cumulative Energy

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