锦屏层状大理岩断裂机制的细观试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (3788 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要锦屏地下深埋岩石处于高应力状态，地下洞室开挖后围岩变形破坏所引起的工程问题十分突出。结合取自锦屏二级交通辅助洞的层状盐塘组大理岩及均质的白山组大理岩，利用扫描电镜高温疲劳试验系统，对层状盐塘组大理岩进行不同作用方向下的三点弯曲试验，并和均质的白山组大理岩试件进行对比分析研究层状大理岩不同层理方向的细观断裂机制及其与特征参数间的关系，同时，研究层理与主应力方向的关系对洞室围岩破坏机制的影响。结果表明：围岩层状特性是由于白云石及方解石矿物条带状分布所致；作用力方向对层状围岩的断裂机制有着决定性的影响，均质白山组大理岩试件细观断裂机制为沿晶断裂，作用力方向垂直盐塘组大理岩层理时为穿晶断裂与沿晶断裂的耦合作用模式，作用力方向平行层理时则以沿矿物条带间的沿晶断裂机制为主；断裂机制的不同使得宏观上的强度参数呈规律性差异，盐塘组平行层理试件与白山组试件的峰值荷载分别为盐塘组垂直层理的58%，44%，峰值断裂能分别为42%，29%；作为断裂机制外在宏观表现的3组试件断面形貌具有自相似分形特征。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：岩石力学, 锦屏, 层状大理岩, 三点弯曲试验, 扫描电镜, 断裂机制

Abstract：Because of surrounding rock deformation fracture in deep-buried and high geostress conditions，the project problem is very prominent at Jinping II hydropower station underground engineering. The bedded marble which is collected from the Jinping II hydropower station auxiliary traffic tunnel is used for three-point bending experiment on different loading directions with the scanning electron microscope(SEM) high temperature fatigue testing system. The relation between different bedding directions marble?s failure mechanism and strength parameter is analyzed through comparison with homogeneous marble；then the infection to fracture mechanism of surrounding rock by the different loading directions to bedded marble is researched. The results show that the banded structure feature between dolomite mineral particles and calcite mineral particles leads to bedded features of marble；loading direction is the final factor to the fracture mechanism，the failure mechanism of homogeneous marble is that the crack propagation propagate between dolomite mineral particles，when loading direction plumb the bedding；the failure mechanism is coupling fracture with that the cracks penetrate calcite mineral particles and propagate between dolomite mineral particles；and when loading direction parallels to the bedding，the failure mechanism mainly is that the cracks propagate between mineral particles. The difference of strength parameter is disciplinary on macroscopy because of different fracture mechanisms，such as the peak load of homogeneous marble and parallel bedding specimen is 0.58 times and 0.44 times than vertical bedding specimen?s；and the breaking energy is 0.42 times and 0.29 times. The three groups of marble fracture surface as the fracture mechanism? expression on macroscopy has self-similar fractal features.

Key words： rock mechanics Jinping bedded marble three-point bending experiment scanning electron microscope(SEM) fracture mechanism

收稿日期: 2011-04-08

引用本文:

赵小平1，左建平2，裴建良1. 锦屏层状大理岩断裂机制的细观试验研究[J]. 岩石力学与工程学报, 2012, 31(3): 534-542.
ZHAO Xiaoping1，ZUO Jianping2，PEI Jianliang1. MESO-EXPERIMENTAL STUDY OF FRACTURE MECHANISM OF BEDDED MARBLE IN JINPING. , 2012, 31(3): 534-542.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/I3/534

[1]	裴建良，刘建峰，徐进. 层状大理岩卸荷力学特性试验研究[J]. 岩石力学与工程学报，2009，28(12)：2 496-2 502.(PEI Jianliang，LIU Jianfeng，XU Jin. Experimental study of mechanical properties of layered marble under unloading condition[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(12)：2 496-2 502.(in Chinese)) " target="_blank">
[2]	赵平劳，姚增. 层状岩石动静态力学参数相关性的各向异性[J]. 兰州大学学报：自然科学版，1993，29(4)：225-229.(ZHAO Pinglao，YAO Zeng. The anisotropy of the dynamic parameters with the static parameters of bedded rock[J]. Journal of Lanzhou University：Natural Science，1993，29(4)：225-229.(in Chinese)) " target="_blank">
[3]	赵平劳. 层状结构岩石抗剪强度各向异性试验研究[J]. 兰州大学学报：自然科学版，1990，26(4)：135-139.(ZHAO Pinglao. The experimental study of anisotropy of shear strength of bedded rock[J]. Journal of Lanzhou University：Natural Science，1990，26(4)：135-139.(in Chinese)) " target="_blank">
[4]	赵平劳. 层状岩石抗压强度围压效应各向异性研究[J]. 兰州大学学报：自然科学版，1993，29(1)：105-109.(ZHAO Pinglao. Anisotropy study on confining pressure effect about compressive strength of bedded rock[J]. Journal of Lanzhou University：Natural Science，1993，29(1)：105-109.(in Chinese)) " target="_blank">
[5]	吴世勇，龚秋明，王鸽，等. 锦屏II级水电站深部大理岩板裂化破坏试验研究及其对TBM开挖的影响[J]. 岩石力学与工程学报，2010，29(6)：1 089-1 095.(WU Shiyong，GONG Qiuming，WANG Ge，et al. Experimental study of slabbing failure for deep-buried marble at Jinping II hydropower station and its influences on TBM excavation[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 089-1 095.(in Chinese) ) " target="_blank">
[6]	左建平，谢和平，周宏伟，等. 不同温度作用下砂岩热开裂的实验研究[J]. 地球物理学报，2007，50(4)：1 150-1 155.(ZUO Jianping，XIE Heping，ZHOU Hongwei，et al. Experimental research on thermal cracking of sandstone under different temperatures[J]. Chinese Journal of Geophysics，2007，50(4)：1 150-1 155.(in Chinese)) " target="_blank">
[7]	左建平，周宏伟，谢和平. 不同温度影响下砂岩的断裂特性研究[J]. 工程力学，2008，25(5)：124-130.(ZUO Jianping，ZHOU Hongwei，XIE Heping. Fracture characteristics of sandstone under thermal effects[J]. Engineering Mechanics，2008，25(5)：124-130.(in Chinese)) " target="_blank">
[8]	左建平，谢和平，刘瑜杰，等. 不同温度热处理后砂岩三点弯曲的断裂特性[J]. 固体力学学报，2010，31(2)：119-125.(ZUO Jianping，XIE Heping，LIU Yujie，et al. Investigation on fracture characteristics of sandstone after thermal effects through three-bending point experiments[J]. Chinese Journal of Solid Mechanics，2010，31(2)：119-125.(in Chinese)) " target="_blank">
[9]	左建平，周宏伟，刘瑜杰. 不同温度下砂岩三点弯曲破坏的特征参量研究[J]. 岩石力学与工程学报，2010，29(4)：705-712.(ZUO Jianping，ZHOU Hongwei，LIU Yujie. Research on characteristic parameters of sandstone three-point bending failure under different temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：705-712.(in Chinese))
[10]	XIE H P，ZUO J P，ZHOU H W，et al. Meso-failure mechanism of rock under thermal-mechanical coupling effects[J]. Journal of Mechanics and MEMS，2009，1(2)：157-167. " target="_blank">
[11]	左建平，周宏伟，谢和平，等. 温度和应力耦合作用下砂岩破坏的细观试验研究[J]. 岩土力学，2008，29(6)：1 477-1 481.(ZUO Jianping，ZHOU Hongwei，XIE Heping，et al. Meso-experimental research on sandstone failure behavior under thermal-mechanical coupling effect[J]. Rock and Soil Mechanics，2008，29(6)：1 477- 1 481.(in Chinese)) " target="_blank">
[12]	姜崇喜，谢强. 大理岩细观破坏行为的实时观察与分析[J]. 西南交通大学学报，1999，34(1)：87-92.(JIANG Chongxi，XIE Qiang. Real time observation and analysis of meso-fracture behavior of marble samples[J]. Journal of Southwest Jiaotong University，1999，34(1)：87-92.(in Chinese)) " target="_blank">
[13]	鞠杨，刘彩平，谢和平. 混凝土断裂及亚临界扩展的细观机制[J]. 工程力学，2003，20(5)：1-9.(JU Yang，LIU Caiping，XIE Heping. The mesomechanism of fracture process and subcritical crack growth in concrete[J]. Engineering Mechanics，2003，20(5)：1-9.(in Chinese))
[14]	刘小明，李焯芬. 岩石断口微观断裂机制分析与实验研究[J]. 岩石力学与工程学报，1997，16(6)：509-513.(LIU Xiaoming，LEE C F. Microfailure mechanism analysis and test study for rock failure surface[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(6)：509-513.(in Chinese))
[15]	刘小明，侯发亮. 拉西瓦花岗岩断口粗糙度分形分析[J]. 岩石力学与工程学报，1996，15(增)：440-445.(LIU Xiaoming，HOU Faliang. Laxiwa granite surface fractal analysis[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(Supp.)：440-445.(in Chinese)) " target="_blank">
[16]	朱珍德，张勇，王春娟. 大理岩脆-延性转换的微观机制研究[J]. 煤炭学报，2005，30(1)：31-35.(ZHU Zhende，ZHANG Yong，WANG Chunjuan. Study on microcosmic mechanics for brittle-ductile transition of marble[J]. Journal of China Coal Society，2005，30(1)：31-35.(in Chinese))
[17]	朱珍德，徐卫亚，张爱军. 脆性岩石损伤断裂机制分析与试验研究[J]. 岩石力学与工程学报，2003，22(9)：1 411-1 416.(ZHU Zhende，XU Weiya，ZHANG Aijun. Mechanism analysis and testing study on damage and fracture of brittle rock[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(9)：1 411-1 416.(in Chinese)) " target="_blank">
[18]	倪骁慧，李晓娟，朱珍德. 不同温度循环作用后大理岩细观损伤特征的定量研究[J]. 煤炭学报，2011，36(2)：248-254.(NI Xiaohui，LI Xiaojuan，ZHU Zhende. Quantitative test on meso-damage characteristics of marble after different temperatures[J]. Journal of China Coal Society，2011，36(2)：248-254.(in Chinese))
[19]	肖筱楠，赵来军，党林立，等. 现代数值计算方法[M]. 北京：北京大学出版社，2004：186-190.(XIAO Xiaonan，ZHAO Laijun，DANG Linli，et al. Modern numerical calculation method[M]. Beijing：Peiking University Press，2004：186-190.(in Chinese)) " target="_blank">
[20]	庄茁，蒋持平. 工程断裂与损伤[M]. 北京：机械工业出版社，2004：6-9.( ZHUANG Zhuo，JIANG Chiping. Engineering fracture and damage[M]. Beijing：Machinery Industry Press，2004：6-9.(in Chinese)) " target="_blank">
[21]	XIE H P，WANG J A. Direct fractal measurement of fracture surfaces[J]. International Journal of Solids and Structures，1999，36(20)：3 073-3 084. " target="_blank">
[22]	谢和平. 大理岩微观断裂的分形(fractal)模型研究[J]. 科学通报，1989，34(5)：365-368.(XIE Heping. Study on the fractal model of marble meso-fracture[J]. Chinese Science Bulletin，1989，34(5)：365-368.(in Chinese))
[23]	尤明庆. 两种晶粒大理岩的力学性质研究[J]. 岩土力学，2005，26(1)：91-96.(YOU Mingqing. A study of mechanical property of two marbles with different crystal sizes[J]. Rock and Soil Mechanics，2005，26(1)：91-96.(in Chinese)) " target="_blank">