文献类型：期刊文献

中文题名：应用激光多普勒测振仪的岩块体累计损伤评价试验研究

英文题名：Experimental study on cumulative damage assessment of rock-block using a laser Doppler vibrometer

作者：杜岩[1,2];谢谟文[1];蒋宇静[2];宋红克[1];李博[3];刘日成[4]

机构：[1]北京科技大学土木与资源工程学院;[2]长崎大学工学部;[3]绍兴文理学院山体地质灾害防治协同创新中心;[4]中国矿业大学深部岩土力学与地下工程国家重点实验室

年份：2017

卷号：39

期号：1

起止页码：141

中文期刊名：工程科学学报

外文期刊名：Chinese Journal of Engineering

收录：CSTPCD、、北大核心2014、EI(收录号：20170903401139)、Scopus(收录号：2-s2.0-85013976180)、CSCD2017_2018、北大核心、CSCD

基金：国家自然科学基金资助项目(41572274;41372370);中国博士后科学基金资助项目(2016M591078);中央高校基本科研业务费资助项目(FRF--TP-16--014A1);北京科技大学"创新人才培养"项目(USTB201309FX);浙江省山体地质灾害防治协同创新中心开放基金课题(PCMGH--2016--Y-02)

语种：中文

中文关键词：岩石力学;损伤评价;激光多普勒测振仪;固有振动频率;黏结力

外文关键词：rock mechanics; damage assessment; laser Doppler vibrometers; natural vibration frequency; cohesion

中文摘要：岩块体崩塌破坏的突发性使其成为最难预防的地质灾害,严重威胁人类的生命财产安全.边坡岩块体崩塌破坏多是系统不稳定导致的动力破坏,而用振动特征参数来进行安全监测和损伤评价更为有效.本文应用激光多普勒测振技术,通过固有振动频率对危岩块体主控结构面的黏结力损伤进行定量分析.通过改进后的极限平衡模型,得出结构面不断劣化块体的安全系数由原来的1.17下降到1.04,与实际破坏结果相符.试验结果表明:固有振动频率一方面可对危岩块体累积损伤进行有效识别,另一方面可以为黏结力参数的合理确定提供客观的数据支持.因此,基于固有振动频率分析的激光多普勒测振技术可实现边坡岩块体的累计损伤评价,并将在未来的工程应用中发挥巨大的作用.

外文摘要：Rock-block collapse has been a hot issue in the study of geological hazards for many years,and it is difficult to prevent because of its sudden disintegration,which is a serious threaten to human life and property safety. Rock-block collapse is caused by dynamic failure derived from system instability,so it can be more effective to apply vibration characteristic parameters in damage assessment and early warning. By using a laser Doppler vibrometer,the cohesion damage of control fissure was analyzed by natural vibration frequency in the paper. Based on the modified limit equilibrium model,the safety factor of the block with a deteriorating structural plane was calculated by the frequency,which decreased from 1. 17 to 1. 04,in accordance with the reality. The results show that the natural vibration frequency can effectively identify the unstable rock cumulative damage and provide objective data for reasonable determination of the cohesion. The laser Doppler vibrometer technology based on natural vibration frequency can satisfy cumulative damage evaluation of unstable rocks. It will play a significant role in engineering applications in the future.