不同倾角贯穿节理类岩石试件峰后变形破坏试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要用微机控制高刚度伺服试验机，开展预制贯穿节理类岩石试件的单轴压缩试验，系统研究贯穿节理类岩石试件峰后应力–应变曲线、破坏形式、峰后残余强度、峰后视泊松比等与裂隙倾角之间的关系。试验发现：(1) 节理倾角为15°时，峰后的应力–应变曲线和完整试件的基本相同，当节理倾角为30°，40°，50°，60°时，峰后应力–应变曲线与完整试件的差别很大；(2) 峰值强度随着节理倾角的增大而减小，峰后的残余强度也大致上随节理倾角增大而减小；(3) 随着节理倾角的增大，含节理试件的泊松比也随之增大，而峰值强度后破坏阶段的视泊松比则随之变小；(4) 试件峰后破坏模式随节理倾角的变化而不同，在倾角为15°时为劈裂破坏，倾角为50°，60°时为剪切破坏，倾角为30°，40°时为劈裂和剪切破坏的混合模式。研究成果可以反映含单组全贯穿节理类岩石材料的加载破坏峰后力学和变形破坏特性。

	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, 贯穿节理, 峰后, 节理倾角, 单轴压缩

Abstract：The uniaxial compression test of pre-existing persistent jointed rock-like specimens is carried out by high stiffness servo control testing machine. Systematic researches on the relationship of post-peak stress-strain curve，failure form，strength after peak，the Poisson?s ratio after peak of rock masses with dip angles of persistent joints are performed. The results indicate that：(1) The post-peak stress-strain curves of specimens with joint inclination angle of 15°and complete specimens are basically the same，but the post-peak stress-strain curves of specimens with the joint inclination angle of 30°，40°，50° to 60° and complete specimens vary greatly. (2) Peak strength decreases with the increase of joint inclination angle，residual post-peak strength also generally increases as the joint angle increases. (3) Poisson?s ratio of jointed specimen increases with joint inclination angle increases，but the post-peak visual Poisson?s ratio becomes smaller in the phase of destruction with joint inclination angle increases. (4) The post-peak failure modes of specimen change with joint inclination angle. Specimens damage is splitting failure at the joint inclination angle of 15°，shear failure at the joint inclination angle of 50° and 60°， splitting and shear mixing model at the joint inclination angle of 30° and 40°. The research result can reflect mechanics，deformation and damage characteristics under uniaxial compressive loading in the phase of post-peak of rock masses with different dip angles pre-existing persistent joints.

Key words： rock mechanics transfixion joint post-peak joint inclination angle uniaxial compression

收稿日期: 2012-11-05

引用本文:

李树忱1，汪雷1，2，李术才1，韩建新1，3. 不同倾角贯穿节理类岩石试件峰后变形破坏试验研究[J]. 岩石力学与工程学报, 2013, 32(s2): 3391-3395.
LI Shuchen1，WANG Lei1，2，LI Shucai1，HAN Jianxin1，3. POST-PEAK DEFORMATION AND FAILURE EXPERIMENTAL STUDY OF ROCK-LIKE SPECIMENS WITH DIFFERENT INCLINATION ANGLES PERSISTENT JOINTS. , 2013, 32(s2): 3391-3395.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/Is2/3391

[7]	夏才初，李宏哲，刘胜. 含节理岩石试件的卸荷变形特性研究[J].岩石力学与工程学报，2010，29(4)：697-704.(XIA Caichu，LI Hongzhe，LIU Sheng. Study of deformation properties of jointed specimens under unloading conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：697-704.(in Chinese))
[10]	YANG S Q，DAI Y H，HAN L J，et al. Experimental study on mechanical behavior of brittle marble samples containing different flaws under uniaxial compression[J]. Engineering Fracture Mechanics，2009，76(12)：1 833-1 845. " target="_blank">
[14]	WASANTHA P L P，RANJITH P G. Influence of the geometry of partially-spanning joints on the uniaxial compressive strength of rock[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50(2)：140-146. " target="_blank">
[3]	WONG R H C，TANG C A，CHAU K T，et al. Splitting failure in brittle rocks containing pre-existing flaws under uniaxial compression[J]. Engineering Fracture Mechanics，2002，69(17)：1 853-1 871. " target="_blank">
[9]	KULATILAKE P H S W，HE W，UM J，et al. A physical model study of jointed rock mass strength under uniaxial compressive loading[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(3/4)：165.e1-165.e15. " target="_blank">
[13]	陈新，廖志红，李德建. 节理倾角及连通率对岩体强度、变形影响的单轴压缩试验研究[J]. 岩石力学与工程学报，2011，30(4)：781-789.(CHEN Xin，LIAO Zhihong，LI Dejian. Experimental study of effects of joint inclination angle and connectivity rate on strength and deformation properties of rock masses under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(4)：781-789.(in Chinese))
[2]	晏石林，黄玉盈，陈传尧. 贯通节理岩体等效模型与弹性参数确定[J]. 华中科大学学报：自然科学版，2001，29(6)：60-63.(YAN Shilin，HUANG Yuying，CHEN Chuanyao. An equivalent model for jointed rock mass with persistent joint and its elastic parameters[J]. Journal of Huazhong University of Science and Technology：Natural Science，2001，29(6)：60-63.(in Chinese)) " target="_blank">
[5]	BRADY B H G，BROWN E T. Rock Mechanics for underground mining[M]. [S. l.]：Kluwer Academic Publishers，2005：454-647. " target="_blank">
[6]	周维垣. 高等岩石力学[M]. 北京：水利水电出版社，1990：296-310.(ZHOU Weiyuan. Higher Rock Mechanics[M]. Beijing：China Water Power Press，1990：296-310.(in Chinese)) " target="_blank">
[11]	葛修润，周百海，刘明贵. 对岩石峰值后区特性的新见解[J]. 中国矿业，1992，(2)：57-60.(GE Xiurun，ZHOU Baihai，LIU Minggui. A new understanding of post-failure behaviour of rock[J]. China Mining Magazine，1992，(2)：57-60.(in Chinese)) " target="_blank">
[1]	JAEGER J C，N J W. Fundamentals of Rock Mechanics[M]. 4th ed. London：Chapmen and Hall，2007：419-430. " target="_blank">
[4]	李树忱，冯现大，李术才，等. 深部岩体分区破裂化现象数值模拟[J]. 岩石力学与工程学报，2011，30(7)：1 338-1 344.(LI Shuchen，FENG Xianda，LI Shucai，et al. Numerical simulation of zonal disintegration for deep rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(7)：1 338-1 344.(in Chinese)) " target="_blank">
[8]	李宏哲，夏才初，王晓东，等. 含节理大理岩变形和强度特性的试验研究[J]. 岩石力学与工程学报，2008，27(10)：2 118-2 123.(LI Hongzhe，XIA Caichu，WANG Xiaodong，et al. Experimental study on deformation and strength properties of jointed marble specimens[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)： 2 118-2 123.(in Chinese)) " target="_blank">
[12]	靖洪文. 峰后岩石剪胀性能试验研究[J]. 岩土力学，2003，24(1)：93-102.(JING Hongwen. Experimental study on dilatancy nature of the rock post-peak behavior[J]. Rock and Soil Mechanics，2003，24(1)：93-102.(in Chinese)) " target="_blank">