文献类型：期刊文献

中文题名：不同加载条件下岩石破坏产生的次声波信号特征试验研究

英文题名：Laboratory Investigation of Characteristics of Infrasonic Sound during Rock Failures under Different Types of Loading

作者：陈忠清[1,2];魏威[1];吕越[1,2];高鑫[3];NJOKU OGECHI ADURAMOMI[1]

机构：[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

年份：2020

卷号：40

期号：4

起止页码：9

中文期刊名：绍兴文理学院学报

外文期刊名：Journal of Shaoxing University

收录：国家哲学社会科学学术期刊数据库

基金：浙江省公益技术应用研究计划项目“基于次声波技术的浙江地区岩质滑坡灾害监测预警关键技术研究”(2016C33052).

语种：中文

中文关键词：次声波;单轴压缩;斜剪;监测;岩石

外文关键词：infrasonic sound;uniaxial compression;skew shear;monitoring;rock

中文摘要：次声波是一种频率范围小于20 Hz的低频声波信号,其在滑坡监测预警中的应用探索受到越来越多关注.选取浙江地区的玄武岩、砂岩、灰岩及凝灰岩四种典型岩石,通过单轴压缩试验、岩桥剪切试验和结构面剪切试验,研究了岩石在多种不同加载条件下发生破坏所产生的次声波信号特征.试验结果表明:四种典型岩石在单轴压缩、岩桥剪切及结构面剪切条件下发生破坏过程中均产生明显的次声波现象,次声信号主频基本上集中在1 Hz^8 Hz范围内,且与岩性和加载方式之间均不存在明显的相关性;不同加载条件下岩石发生破坏所产生的次声信号累计振铃计数呈现明显递增性,总体在岩石破坏前后达到峰值,与岩性和加载方式之间亦不存在明显的关联.研究结果对浙江地区滑坡灾害次声监测预警具有一定参考价值.

外文摘要：Infrasound is a low frequency acoustic signal with a frequency range less than 20 Hz,and the application of infrasonic technology in monitoring and early warning of landslides is attracting increasing attention.With the four typical types of rocks in Zhejiang province such as basalt,sandstone,limestone and tuff,different types of laboratory tests such as the uniaxial compression test and skew shear tests corresponding to the rock bridge and structural plane,respectively,were conducted to investigate the characteristics of infrasound signals produced by rock failures under various loading conditions.The results show as follows:(1)obvious infrasound signals are produced under different loading conditions with different rocks,and the main frequency of infrasound signals basically ranges from 1 Hz to 8 Hz with little correlation with lithology and loading conditions;(2)the cumulative ringing counts of the four different lithological rocks show a significant trend of increase,generally reaching the peak value before and after rock failures with little correlation with lithology and loading conditions.The research results can be taken as a reference for infrasound monitoring and early warning of landslides in Zhejiang province.