土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (5): 621-623.

• 测试技术 • 上一篇    下一篇

结构面剪切条件下岩石声发射特征研究

金嘉怡1,朱泽威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:2020-05-11 出版日期:2021-10-31 发布日期:2021-10-22
  • 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:金嘉怡(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 Investigations of the Acoustic Emission Characteristic of Rock Samples Sheared Along Structural Plane

JIN Jiayi1, ZHU Zewei1, 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:2020-05-11 Online:2021-10-31 Published:2021-10-22

摘要： 针对浙江地区的玄武岩、砂岩及灰岩，通过结构面剪切试验，对岩石结构面剪切破坏过程的声发射特征进行研究。结果表明，三种典型岩石在结构面剪切条件下声发射的变化特征与剪应力变化特征相似，二者相关性较明显，声发射的产生及其特征与结构面的粗糙度密切相关；灰岩、砂岩中累积振铃数与累积能量从剪切总位移的60%附近开始激增，玄武岩声发射累计振铃计数与累计能量在达到峰值剪应力后呈现明显的台阶式递进上升特征。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, 斜剪试验, 岩石, 结构面

Abstract: In order to obtain the characteristics of the acoustic emission (AE) during the deformation process of rock samples, this paper presents the structural plane shear tests of three types of rock samples, including basalt, sandstone and limestone from Zhejiang Province. The results indicate that the acoustic emission characteristics of three typical types of rock samples have general similarities. The results also show that the variation characteristics of AE and shear stress of three types of rock samples under the condition of shearing along the structural plane are similar. The correlation between the AE and the shear stress is highly related. The occurrence and the characteristics of AE are closely related to the roughness of the structural plane. The cumulative ringing number and cumulative energy of limestone and sandstone increase sharply from 60% of the total shear displacement. Results from the basalt samples show a step-by-step ascending feature after reaching the peak shear stress. The results can be used as a reference for the monitoring and the prediction of landslides in rock mass in Zhejiang Province.

Key words: acoustic emission (AE), skewed shear test, rock mass, structural plane

中图分类号: