剪切荷载作用下砂岩细观开裂扩展演化特征研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (767 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要利用自主研发的煤岩细观剪切试验装置，对砂岩在剪切荷载作用下微裂纹的开裂扩展过程及其破坏后细观裂纹的分布特征进行试验研究，同时借助图像处理技术，探讨砂岩在剪切荷载作用下微裂纹的时空演化规律。研究结果表明：在剪切荷载作用下，砂岩试件外观损伤在加载过程中的大部分阶段不明显，而砂岩的开裂扩展在相对较短的时间内完成，且开裂扩展过程中产生的变形较小，其明显的开裂扩展过程多发生在峰值应力后的破坏阶段，且总体上是自下往上发展的；砂岩断裂破坏过程中既有绕晶破裂，也有穿晶破裂产生，但其开裂扩展主要产生于颗粒边界和胶结物中，这主要是该破裂方式需要消耗的能量较少；由于受砂岩表面矿物颗粒的排列组合方式、胶结程度等因素的影响，细观裂纹的开裂扩展方向具有一定的不规则性，与预定的剪切面方向有一定程度的偏差。

	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, 砂岩, 剪切, 裂纹, 时空演化

Abstract：Experimental study is made on microfracturing progress of microcrack of sandstone and its distribution characteristics after failure under shear loading condition by independent developmental coal or rock microscopic shear testing device. Simultaneously，temporal and spatial evolution law of microcrack of sandstone under the shear loading is also researched by image processing technology. The results show that damage of sandstone specimen in external appearance is unconspicuous in most part of the loading process，and microfracturing progress of sandstone is finished in a relatively short time. Deformation of sandstone is also small during the fracturing progress. The conspicuous microfracturing progress is in the damage stage after peak stress and in general the fracture is extended upward from the bottom of the specimen. Furthermore，in the process of rupture failure of sandstone，it is produced both intergranular fracture and transgranular fracture，however，the main microfracturing progress is produced in grain boundary and cement；this is mainly low consume energy in the failure mode. Because the fracturing progress of microcrack is influenced by permutation and combination mode and cementation degree of mineral particles in sandstone surface；the spreading direction of microcrack has irregularity，which has bias in some degree compared with predetermined shear plane.

Key words： rock mechanics sandstone shear crack temporal and spatial evolution

收稿日期: 2010-12-23

引用本文:

许江1，2，陆丽丰1，2，杨红伟1，2，张媛1，2，王雷1，2. 剪切荷载作用下砂岩细观开裂扩展演化特征研究[J]. 岩石力学与工程学报, 2011, 30(5): 944-950.
XU Jiang1，2，LU Lifeng1，2，YANG Hongwei1，2，ZHANG Yuan1，2，WANG Lei1，2. STUDY OF EVOLUTION LAW OF MICROFRACTURING PROGRESS OF SANDSTONE UNDER SHEAR LOADING. , 2011, 30(5): 944-950.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I5/944

[16]	谢和平，陈至达. 分形几何与岩石断裂[J]. 力学学报，1988，20(3)：264-275.(XIE Heping，CHEN Zhida. Fractal geometry and fracture of rock[J]. Acta Mechanica Sinica，1988，20(3)：264-275.(in Chinese))
[2]	陈忠辉，唐春安，傅宇方. 岩石微破裂损伤演化诱致突变的数值模拟[J]. 岩土工程学报，1998，20(6)：9-15.(CHEN Zhonghui，TANG Chun?an，FU Yufang. Infinite element simulation of catastrophe induced by evolution of rock micro fracturing damage[J]. Chinese Journal of Geotechnical Engineering，1998，20(6)：9-15.(in Chinese)) " target="_blank">
[4]	尹光志，代高飞，万玲，等. 岩石微裂纹演化的分岔混沌与自组织特征[J]. 岩石力学与工程学报，2002，21(5)：635-639.(YIN Guangzhi，DAI Gaofei，WAN Ling，et al. Characteristics of bifurcation，chaos and self-organization of evolution of microcracks in rock[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(5)：635-639.(in Chinese)) " target="_blank">
[6]	许强，黄润秋. 岩石破裂过程的自组织临界特征初探[J]. 地质灾害与环境保护，1996，7(1)：25-30.(XU Qiang，HUANG Runqiu. Discussion on self-organized critical characteristics in the course of rock failure[J]. Journal of Geological Hazards and Environment Preservation，1996，7(1)：25-30.(in Chinese)) " target="_blank">
[8]	尚嘉兰，孔常静，李廷芥，等. 岩石细观损伤破坏的观测研究[J]. 试验力学，1999，14(3)：373-383.(SHANG Jialan，KONG Changjing，LI Tingjie，et al. Observation and study on meso-damage and fracture of rock[J]. Journal of Experimental Mechanics，1999，14(3)：373-383.(in Chinese)) " target="_blank">
[10]	葛修润，任建喜，蒲毅彬，等. 岩石细观损伤扩展规律的CT实时试验[J]. 中国科学(E辑)，2000，30(2)：104-111.(GE Xiurun，REN Jianxi，PU Yibin，et al. Real-time CT test on the meso-damage development law of rock[J]. Science in China(Series E)，2000，30(2)：104-111.(in Chinese)) " target="_blank">
[12]	任建喜，葛修润，蒲毅彬，等. 岩石单轴细观损伤演化特性的CT实时分析[J]. 土木工程学报，2000，33(6)：99-104.(REN Jianxi，GE Xiurun，PU Yibin，et al. Real-time CT test on the meso-damage evolution of rock under uniaxial compression[J]. China Civil Engineering Journal，2000，33(6)：99-104.(in Chinese)) " target="_blank">
[1]	蔡美峰，何满潮，刘东燕. 岩石力学与工程[M]. 北京：科学出版社，2002：12-17.(CAI Meifeng，HE Manchao，LIU Dongyan. Rock mechanics and engineering[M]. Beijing：Science Press，2002：12-17.(in Chinese)) " target="_blank">
[3]	许江，李贺，鲜学福，等. 对单轴应力状态下砂岩微观断裂发展全过程的试验研究[J]. 力学与实践，1986，8(4)：24-28.(XU Jiang，LI He，XIAN Xuefu，et al. Meso-mechanical experiment of microfracturing progress of sandstone under uniaxial stress condition[J]. Mechanics in Engineering，1986，8(4)：24-28.(in Chinese))
[5]	代高飞，尹光志，皮文丽. 压缩荷载下煤岩损伤演化规律细观试验研究[J]. 同济大学学报：自然科学版，2004，32(5)：591-595.(DAI Gaofei，YIN Guangzhi，PI Wenli. Experimental study on meso- damage evolution of coal under uniaxial compression[J]. Journal of Tongji University：Natural Science，2004，32(5)：591-595.(in Chinese)) " target="_blank">
[7]	张后全，贺永年，韩立军，等. 岩石破裂过程微裂纹演化规律有限元统计分析[J]. 中国矿业大学学报，2007，36(2)：166-171. (ZHANG Houquan，HE Yongnian，HAN Lijun，et al. Statistic analysis of the evolution laws of microcracks in rock failure process by finite element method[J]. Journal of China University of Mining and Technology，2007，36(2)：166-171.(in Chinese)) " target="_blank">
[9]	倪骁慧，朱珍德，赵杰，等. 岩石破裂全程数字化细观损伤力学试验研究[J]. 岩土力学，2009，30(11)：3 283-3 290.(NI Xiaohui，ZHU Zhende，ZHAO Jie，et al. Meso-damage mechanical digitalization test of complete process of rock failure[J]. Rock and Soil Mechanics，2009，30(11)：3 283-3 290.(in Chinese)) " target="_blank">
[11]	任建喜，葛修润，蒲毅彬，等. 岩石破坏全过程的CT细观损伤演化机制动态分析[J]. 西安公路交通大学学报，2000，20(2)：12-15.(REN Jianxi，GE Xiurun，PU Yibin，et al. CT real-time analysis of meso-damage propagation law of the whole process of rock failure[J]. Journal of Xi?an Highway University，2000，20(2)：12-15.(in Chinese)) " target="_blank">
[13]	刘冬梅，谢锦平，周玉斌，等. 岩石压剪耦合破坏过程的实时监测研究[J]. 岩石力学与工程学报，2004，23(10)：1 616-1 620.(LIU Dongmei，XIE Jinping，ZHOU Yubin，et al. Real-time testing study of rock fracture under coupled compression and shear[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(10)：1 616- 1 620.(in Chinese)) " target="_blank">
[14]	刘冬梅，蔡美峰，周玉斌，等. 岩石裂纹扩展过程的动态监测研究[J]. 岩石力学与工程学报，2006，25(3)：467-472.(LIU Dongmei，CAI Meifeng，ZHOU Yubin，et al. Dynamic monitoring on developing process of rock cracks[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：467-472.(in Chinese))
[15]	刘冬梅，蔡美峰，周玉斌. 岩石细观损伤演化与宏观变形响应关联研究[J]. 中国钨业，2006，21(4)：16-19.(LIU Dongmei，CAI Meifeng，ZHOU Yubin，et al. Study on the relationship between mesodamage development and macrodeformation of rock under uniaxial compression[J]. China Tungsten Industry，2006，21(4)：16-19.(in Chinese)) " target="_blank">