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不连续岩体变形破坏过程中AE的空间演化与意义
引用本文:曾正文,马瑾,王艾芳.不连续岩体变形破坏过程中AE的空间演化与意义[J].力学学报,1994,2(1):46-53.
作者姓名:曾正文  马瑾  王艾芳
作者单位:国家地震局地质研究所,北京100029
基金项目:中国科学院地质研究所工程地质力学开放研究实验室资助
摘    要:通过一些典型节理化岩体模型变形破坏过程中的AE事件的定位分析和破裂面形态的研究,探讨了不连续岩体变形破坏过程的空间演化特征。结果表明:单节理岩体变形破坏的空间动态特征受节理角控制,随着节理角从小变大,岩体的变形破坏方式从AE在局部集中的突发式失稳向AE弥漫于整个节理层面的类似渐进式的破坏形式发展;失稳破裂面从简单的整体状岩-膏界面变成形态复杂的层内复合破裂面;复杂节理岩体的变形破坏受一条(组)主导构造控制,强AE事件集中发生在不连续构造交汇部位,在包含多条主构造的岩体模型中最终失稳破裂面只与最后阶段AE的位置一致。

关 键 词:节理岩体  变形破坏  声发射(AE)  空间演化

SPATIAL EVOLUTION OF ACOUSTIC EMISSION EVENTS DURING DEFORMATION AND FAILURE OF DISCONTINUOUS ROCKS AND ITS SIGNIFICANCE
Zeng Zhengwen,Ma Jin,Wang Aifang.SPATIAL EVOLUTION OF ACOUSTIC EMISSION EVENTS DURING DEFORMATION AND FAILURE OF DISCONTINUOUS ROCKS AND ITS SIGNIFICANCE[J].chinese journal of theoretical and applied mechanics,1994,2(1):46-53.
Authors:Zeng Zhengwen  Ma Jin  Wang Aifang
Institution:Institute of Geology, State Seismological Bureau, Beijing 100029
Abstract:Characteristics of spatial evolution of deformation and failure of discontinuous rockmass were investigated by analyzing location of accoustic emission events and geometry of the fracture surfaces. The results show that the spatial dynamic process of deformation and failure of single-jointed rockamss were controled by the joint angle. The fracture mode of single-jointed rockmass changes from sudden failure accompanying with local concentration of AE events to progressive failure with AE events dispersing in the whole jointed layer. Correspondingly, the fracture surfaces developed from simple continuous interfaces of rock-joint substances to complex discontinuous layer inter-joint subfractures. For complex jointed rockmass, the deformation and failure process were controled by a (set of) main discontinuity, Strong AE events occured at or near the conjunction parts of discontinuities. In modes containing several paralell main discontinuities, AE events during the last deformation stage were located only in the final filure surfaces.
Keywords:Jointed rockmass  Deformation and failure  Acoustic emission(AE)  Spatial evoluiton
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