工程科学学报，第39卷.第1期：141-146,2017年1月 Chinese Journal of Engineering,Vol.39,No.1:141-146,January 2017 DOI:10.13374/j.issn2095-9389.2017.01.018;http://journals.ustb.edu.cn 应用激光多普勒测振仪的岩块体累计损伤评价试验 研究 杜 岩2)，谢漠文)四，蒋宇静)，宋红克”，李博3》，刘日成) 1)北京科技大学土木与资源工程学院，北京1000832)长崎大学工学部，长崎852-8521，日本 3)绍兴文理学院山体地质灾害防治协同创新中心，绍兴3120994)中国矿业大学深部岩土力学与地下工程国家重点实验室，徐州221116 ☒通信作者，E-mail:mowenxie@usth.cedu.cn 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. 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 分类号TU458.4 Experimental study on cumulative damage assessment of rock-block using a laser Doppler vibrometer DU Yan'2),XIE Mo-wen,JIANG Yu-jing,SONG Hong-ke,LI Bo,LIU Ri-cheng 1)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Faculty of Engineering,Nagasaki University,Nagasaki 852-8521,Japan 3)Rock Mechanics and Geohazards Center,Shaoxing University,Shaoxing 312099,China 4)State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China Corresponding author,E-mail:mowenxie@ustb.edu.cn ABSTRACT 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 as- sessment and early warning.By using a laser Doppler vibrometer,the cohesion damage of control fissure was analyzed by natural vibra- tion 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 deter- mination 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. KEY WORDS rock mechanics;damage assessment;laser Doppler vibrometers;natural vibration frequency;cohesion 收稿日期：2016-04-28 基金项目：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(RF-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)工程科学学报,第 39 卷,第 1 期:141鄄鄄146,2017 年 1 月 Chinese Journal of Engineering, Vol. 39, No. 1: 141鄄鄄146, January 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 01. 018; http: / / journals. ustb. edu. cn 应用激光多普勒测振仪的岩块体累计损伤评价试验 研究 杜 岩1,2) , 谢谟文1) 苣 , 蒋宇静2) , 宋红克1) , 李 博3) , 刘日成4) 1) 北京科技大学土木与资源工程学院, 北京 100083 2) 长崎大学工学部, 长崎 852鄄鄄8521, 日本 3) 绍兴文理学院山体地质灾害防治协同创新中心, 绍兴 312099 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, 徐州 221116 苣 通信作者, E鄄mail: mowenxie@ ustb. edu. cn 收稿日期: 2016鄄鄄04鄄鄄28 基金项目: 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鄄鄄TP鄄鄄16鄄鄄014A1);北京科技大学“创新人才培养冶项目(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鄄鄄2016鄄鄄Y鄄鄄02) 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郾 17 下降到 1郾 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. 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 分类号 TU458 + 郾 4 Experimental study on cumulative damage assessment of rock鄄block using a laser Doppler vibrometer DU Yan 1,2) , XIE Mo鄄wen 1) 苣 , JIANG Yu鄄jing 2) , SONG Hong鄄ke 1) , LI Bo 3) , LIU Ri鄄cheng 4) 1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Faculty of Engineering, Nagasaki University, Nagasaki 852鄄鄄8521, Japan 3) Rock Mechanics and Geohazards Center, Shaoxing University, Shaoxing 312099, China 4) State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China 苣 Corresponding author, E鄄mail: mowenxie@ ustb. edu. cn ABSTRACT Rock鄄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鄄block collapse is caused by dynamic failure derived from system instability, so it can be more effective to apply vibration characteristic parameters in damage as鄄 sessment and early warning. By using a laser Doppler vibrometer, the cohesion damage of control fissure was analyzed by natural vibra鄄 tion 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郾 17 to 1郾 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 deter鄄 mination 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. KEY WORDS rock mechanics; damage assessment; laser Doppler vibrometers; natural vibration frequency; cohesion