石英云母片岩各向异性特征多尺度精细化描述

doi:10.13722/j.cnki.jrme.2017.0790

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摘要丹巴石英云母片岩片理面发育，具有典型的各向异性特征。此外，现场石英云母片岩中还普遍发育大小不一的石英脉，导致各向异性特征更加复杂。因此需要同时考虑片理面、石英脉和节理裂隙网络的影响。首先，在小尺度的室内试验中，对岩石薄片进行细观结构分析，并开展多组与片理不同夹角的加载试验，揭示石英云母片岩的变形模量和强度随片理角度的变化规律。以颗粒流方法PFC(Particle Flow Code)为基础，采用光滑节理模型模拟片理面、颗粒体模拟岩石基质，从机制层面上实现片理面与岩石基质破坏过程的模拟，准确再现了室内试验结果。为了研究现场大尺度岩体的各向异性特征，利用三维数码摄像技术，现场采集并精细统计岩体结构尤其是石英脉的空间展布特征，并将该特征准确还原于数值模型中，开展不同尺寸、不同结构组成的各向异性特征研究，揭示变形参数和强度参数的变化规律，为工程岩体力学参数选取提供了重要依据。

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	张春生1
	刘宁1
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	褚卫江1
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	陈平志1
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	周勇1
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关键词 ：岩石力学, 各向异性, 石英云母片岩, 多尺度, 颗粒流, 精细化描述

Abstract：The schistosity plane of quartz-mica schist from Danba is well developed with typical anisotropic characteristics. In addition，the quartz vein in quartz-mica schist leads to more complicated anisotropic characteristics. First of all，the mesoscopic structure analysis was carried out on the rock chips in the small scale of indoor experiments，and a number of sets of tests with different loading directions to schistosity plane were carried out. The deformation modulus and the strength of quartz-mica schist were found to change with the schistosity angle. In the simulation with particle flow code(PFC)，the smooth joint was adopted to simulate schistosity plane and the rock matrix was simulated as particles. The method produced the failure process of schistosity surface and rock matrix and reproduced accurately the results of indoor test. In order to study the characteristics of the anisotropy of large scale rock mass，the rock mass structure，especially the spatial distribution characteristics of quartz vein were collected and counted by the three-dimensional digital camera technology. The characteristics were accurately reproduced in numerical modeling. The anisotropic characteristics of quartz-mica in different sizes and with different structures were studied.

Key words： rock mechanics anisotropic characteristics quartz-mica schist multi-scale particle flow code(PFC) fine description

引用本文:

张春生1，刘宁1，2，褚卫江1，2，陈平志1，2，周勇1，2. 石英云母片岩各向异性特征多尺度精细化描述[J]. 岩石力学与工程学报, 2018, 37(3): 573-582.
ZHANG Chunsheng1，LIU Ning1，2，CHU Weijiang1，2，CHEN Pingzhi1，2，ZHOU Yong1，2. Multi-scale fine description on the anisotropic characteristics of quartz-mica schist. , 2018, 37(3): 573-582.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0790 或 http://www.rockmech.org/CN/Y2018/V37/I3/573

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