工程爆破

2020, v.26(04) 23-27+41

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节理岩体对SV波传播的影响
Influence of jointed rockmass on SV wave propagation

路世伟;刘洪宇;孙金山;周传波;
LU Shi-wei;LIU Hong-yu;SUN Jin-shan;ZHOU Chuan-bo;School of Urban Construction, Yangtze University;Institute of Explosion Science and Blasting Technology, Jianghan University;Faculty of Engineering, China University of Geosciences;

摘要(Abstract):

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(KeyWords): SV波;质点振速放缩系数;节理岩体;节理倾角;节理刚度
SV-wave;vibration velocity scaling factor;jointed rockmass;joint inclination angle;joint stiffness

Abstract:

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基金项目(Foundation): 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)

作者(Authors): 路世伟;刘洪宇;孙金山;周传波;
LU Shi-wei;LIU Hong-yu;SUN Jin-shan;ZHOU Chuan-bo;School of Urban Construction, Yangtze University;Institute of Explosion Science and Blasting Technology, Jianghan University;Faculty of Engineering, China University of Geosciences;

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