节理岩体对SV波传播的影响  

Influence of jointed rockmass on SV wave propagation

作　　者：路世伟 刘洪宇 孙金山 周传波[3] LU Shi-wei;LIU Hong-yu;SUN Jin-shan;ZHOU Chuan-bo(School of Urban Construction,Yangtze University,Jingzhou 434023,Hubei,China;Institute of Explosion Science and Blasting Technology,Jianghan University,Wuhan 430056,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]江汉大学湖北(武汉)爆炸与爆破技术研究院,武汉430056 [3]中国地质大学工程学院,武汉430074

出　　处：《工程爆破》2020年第4期23-27,41,共6页Engineering Blasting

基　　金：湖北省自然科学基金资助项目(2019CFB224);湖北省教育厅资助项目(Q201913308);荆州市科技局资助项目(2019Z18001)。

摘　　要：为了研究SV波在岩体节理中的传播规律,以含平行双节理岩体为研究对象,采用快速有限差分方法研究了节理面刚度、节理倾角、节理间距对SV波传播的影响,通过质点振速放缩系数(VSF)的变化来分析影响因素对SV波传播的影响。研究结果表明,节理刚度K对不同位置的VSF影响并不一致,在节理1前监测点的VSF随着K的增大而逐渐减小,其余监测点的VSF随着K的增大而逐渐增大;节理倾角α对VSF的影响较为复杂,但均在45°处出现拐点;各监测点的VSF随节理间距d的增大而减小并趋于稳定。In order to study the propagation law of SV wave jointed rockmass,the rockmass containing parallel double joints was taken as the research object.The influence of joint stiffness, joint inclination angle and joint spacing on SV-wave propagation is studied by using the fast finite difference method, and the influence of influencing factors on SV wave propagation is analyzed by analyzing the change of the vibration velocity scaling factors(VSF). The results show that the influence of joint stiffness K on VSF at different positions is different, VSF before the joint 1 decreases with the increasing K and VSF at other monitoring points decreases;The influence of the inclination α of joints is complex,however, the inflection points appeared at 45°and VSF at all monitoring points decreases with the increasing joint spacing d.

关 键 词：SV波 质点振速放缩系数 节理岩体 节理倾角 节理刚度 

分 类 号：O382.2[理学—流体力学] TD31[理学—力学]