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| Multi-scale fine description on the anisotropic characteristics of quartz-mica schist |
| ZHANG Chunsheng1，LIU Ning1，2，CHU Weijiang1，2，CHEN Pingzhi1，2，ZHOU Yong1，2 |
| (1. PowerChina Huadong Engineering Corporation Limited，Hangzhou，Zhejiang 311122，China；2. HydroChina Itasca Research and Development Center，Hangzhou，Zhejiang 310014，China) |
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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.
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[1] MCLAMORE R，GRAY K E. The mechanical behavior of anisotropic sedimentary rocks[J]. Transactions of the American Society of Mechanical Engineers(Series B)，1967，89(1)：62–76.
[2] AUTIO J，JOHANSSON E，KIRKKOMAI T，et al. In-situ failure test in the research tunnel at Olkiluoto[R]. Helsinki，Finland：Posiva，2000.
[3] CHO J W，KIM H，JEON S，et al. Deformation and strength anisotropy of Asan gneiss，Boryeong shale，and Yeoncheon schist[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50(3)：158–169.
[4] 刘 俊，黄 铭，葛修润，等. 层状岩体开挖的空间弹性偶应力理论分析[J]. 岩石力学与工程学报，2000，19(3)：276–280.(LIU Jun，HUANG Ming，GE Xiurun，et al. Analysis on layered rockmass excavating with spatial elastic couple-stress theory[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：276–280.(in Chinese))
[5] 李杭州，廖红建. 复杂应力状态下岩体强度的各向异性研究[J].岩石力学与工程学报，2010，29(7)：1 397–1 403.(LI Hangzhou，LIAO Hongjian. Anisotropy of strength of rock mass under complicated stress state[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(7)：1 397–1 403.(in Chinese))
[6] 朱泽奇，盛 谦，梅松华，等. 改进的遍布节理模型及其在层状岩体地下工程中的应用[J]. 岩土力学，2009，30(10)：3 115–3 121. (ZHU Zeqi，SHENG Qian，MEI Songhua，et al. Improved ubiquitous- joint model and its application to underground engineering in layered rock masses[J]. Rock and Soil Mechanics，2009，30(10)：3 115–3 121.(in Chinese))
[7] CHO J W，KIM H N，JEON S K，et al. Deformation and strength anisotropy of Asan，Boryeong shale，and Yeoncheon Schist[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50(1)：158–169.
[8] HAKALA M，KUULA H，HUDSON J A. Estimating the transversely isotropic elastic intact rock properties for in situ stress measurement data reduction：a case study of the Olkiluoto mica gneiss，Finland[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(1)：14–46.
[9] SONG I，SUH M，WOO Y K，et al. Determination of the elastic modulus set of foliated rocks from ultrasonic velocity measurements[J]. Engineering Geology，2004，72(3)：293–308.
[10] HOEK E. Strength of jointed rock masses[J]. Geotechnique，1983，23(3)：187–233.
[11] LEE J S，SAGONG M Y，YOO J H，et al. Analytical modelling and experimental verification of tunnel with joint sets[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50(1)：56–64.
[12] ADHIKARY D P，DYSKIN A V. Modelling the deformation of underground excavations in layered rock masses[J]. nternational Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1997，34(3)：1–5.
[13] POTYONDY D O，CUNDALL P A. A bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(8)：1 329–1 364.
[14] 吴顺川，周 喻，高利立，等. 等效岩体技术在岩体工程中的应用[J]. 岩石力学与工程学报，2010，29(7)：1 435–1 441.(WU Shunchuan， ZHOU Yu，GAO Lili，et al. Application of equivalent rock mass technique to rock mass engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(7)：1 435–1 441.(in Chinese))
[15] 周火明，单治钢，张宜虎，等. 复杂应力状态石英云母片岩强度参数研究[J]. 岩石力学与工程学报，2015，34(5)：2 601–2 606.(ZHOU Huoming，SHAN Zhigang，ZHANG Yihu，et al. Strength parameters of quartz-mica schist under complex stress state[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(5)：2 601–2 606.(in Chinese))
[16] EVERITT R A，LAJTAI E Z. The influence of rock fabric on excavation damage in the Lac du Bonnett granite[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(8)： 1 277–1 303.
[17] MIN K B，JING L. Numerical determination of the equivalent elastic compliance tensor for fractured rock masses using the distinct element method[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40(6)：795–816.
[18] GONZAGA G G，LEITE M H，CORTHESY R. Determination of anisotropic deform-ability parameters from a single standard rocks specimen[J]. International Journal of Rock Mechanics and Mining Science，2008，45(8)：1 420–1 438.
[19] NUNES A L. A new method for determination of transverse isotropic orientation and the associated elastic parameters for intact rock[J]. International Journal of Rock Mechanics and Mining Science，2002，39(2)：257–273.
[20] 王思敬. 地下洞室软岩岩体质量分类及处理措施研究与应用[R]. 北京：中国科学院地质与地球物理研究所，2009.(WANG Sijing. Research and application of soft rock mass quality classification in underground cavern and treatment measures[R]. Beijing：Institute of Geology and Geophysics，Chinese Academy of Sciences，2009.(in Chinese))
[21] MAS I D，POTYONDY D O，PIERCE M，et al. The smooth-joint contact model[C]// SCHREFLER B A，PEREGO U ed. Proceedings of the 8th World Congress on Computational Mechanics. Barcelona，Italy：[s.n.]，2008：2 735–2 742.
[22] Itasca Consulting Group Inc.. PFC2D(particle flow code in 2D) theory and background[R]. Minnesota，USA：Itasca Consulting Group Inc.，2013.
[23] CHU W J，ZHANG C S，HOU J. A particle-based model for studying anisotropic strength and deformation of schist[C]// Hudson J A ed. Proceedings of the 3rd ISRM SINOROCK 2013 Symposium. Netherlands：Taylor and Francis Group，2013：593–596. |
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2018, Vol. 37 
