围压对岩石试样强度的影响及离散性

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Abstract Rocks are heterogeneous and have scattered test results for strengths due to the differences among specimens. The strength criterion fitted to test data describes merely an average effect of the confining pressure on the rock’s strengths. The experimental results within the confining pressure of 100 MPa revealed that the dispersion of the strengths resulted from the fissures or cracks in the specimens decreased as the increasing of the confining pressure. The two parameters in the exponential criterion to describe the effect of confining pressure on strengths were found to be material-dependent and not influenced by the other factors of specimens. The uniaxial compression strengths(UCS) of specimens may be calculated from the triaxial strength under confining pressure using the exponential criterion. The strengths of the granite specimen of small size under the high confining pressure were scattered greatly because the respective contents of the quartz，the feldspar and the mica were different in each specimen. Besides，the ends effect of friction affected the strengths of the granite specimen due to the occurrence of large lateral deformations under the high confining pressure.

Key words： rock mechanics scattered strength exponential criterion material parameters

Received: 03 August 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I5/929

[1] 陈颙，黄庭芳，刘恩儒. 岩石物理学[M]. 合肥：中国科学技术大学出版社，2009：3–243.(CHEN Yong，WONG Tengfong，LIU Enru. Physics of rocks[M]. Hefei：University of Science and Technology of China Press，2009：3–243. [2] JAEGER J C，COOK N G W，ZIMMERMAN R W. Fundamentals of rock mechanics[M]. New York：Wiley-Blackwell，2007：145–204. [3] 尤明庆. 完整岩石的强度和强度准则[J]. 复旦大学学报：自然科学版，2013，52(5)：569–582.(YOU Mingqing. Strength and strength criteria for intact rocks[J]. Journal of Fudan University：Natural Science，2013，52(5)：569–582.(in Chinese)) [4] YOU M. Three independent parameters to describe conventional triaxial compression strength of intact rocks[J]. Journal of Rock Mechanics and Geotechnical Engineering，2010，2(4)：350–356. [5] YOU M. Comparison of the accuracy of some conventional triaxial strength criteria for intact rock[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(5)：852–863. [6] 山口梅太郎. 花こぅ岩の强度试验にぉける试验片の数につぃて[J]. 材料，1966，16(160)：520–528. [7] KOSTAK B，BIELENSTEIN H U. Strength distribution in hard rock[J]. International Journal of Rock Mechanics and Mining Sciences，1971，8(4)：501–521. [8] FRANKLIN J A，HOEK E. Development in triaxial testing technique[J]. Rock Mechanics，1970，2(4)：223–228. [9] RAFIAI H. New empirical polyaxial criterion for rock strength[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(5)：922–931. [10] YOU M. Comparison of two true-triaxial strength criteria[J]. International Journal of Rock Mechanics and Mining Sciences，2012，54：114–124. [11] 董陇军，李夕兵. 岩石试验抗压、抗拉区间强度及代表值可信度研究[J]. 岩土工程学报，2010，32(12)：1 969–1 974.(DONG Longjun，LI Xibing. Interval parameters and credibility of representative values of tensile and compression strength tests on rock[J]. Chinese Journal of Geotechnical Engineering，2010，32(12)：1 969–1 974.(in Chinese)) [12] FAIRHURST C. On the validity of the “Brazilian” test for the brittle materials[J]. International Journal of Rock Mechanics and Mining Sciences，1964，1(4)：535–546. [13] 尤明庆. 岩石强度准则的数学形式和参数确定的研究[J]. 岩石力学与工程学报，2010， 29(11)：2 172–2 184.(YOU Mingqing. Study on mathematical equation and parameters of strength criteria for rock[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(11)：2 172–2 184.(in Chinese)) [14] 尤明庆. 单参数的正则抛物线准则[J]. 岩石力学与工程学报，2012，31(8)：1 580–1 586.(YOU Mingqing. Normal parabolic criterion with a single parameter[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(8)：1 580–1 586.(in Chinese)) [15] YOU M. True-triaxial strength criteria for rock[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(1)：115–127. [16] SRIAPAI T. True triaxial compressive strengths of Maha Sarakham rock salt[M. S. Thesis][D]. Thailand：Suranaree University of Technology，2010：33–36. [17] 汪斌，朱杰兵，邬爱清，等. 高应力下岩石非线性强度特性的试验验证[J]. 岩石力学与工程学报，2010，29(3)：542–548.(WANG Bin，ZHU Jiebing，WU Aiqing，et al. Experimental validation of nonlinear strength property of rock under high geostress[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：542–548.(in Chinese)) [18] GOWD T N，RUMMEL F. Effect of confining pressure on the fracture behavior of a porous rock[J]. International Journal of Rock Mechanics and Mining Sciences，1980，17(2)：225–229. [19] HAIMSON B，CHANG C. A new true triaxial cell for testing mechanical properties of rock，and its use to determine rock strength and deformability of westerly granite[J]. International Journal of Rock Mechanics and Mining Science，2000，37(3)：285–296. [20] MOGI K. Experimental rock mechanics[M]. London：Taylor and Francis，2007：6–83. [21] YOU M. Strength and damage of marble in ductile failure[J]. Journal of Rock Mechanics and Geotechnical Engineering，2011，3(2)：161–166. [22] LI J L，WANG L H，WANG R H，et al. Research on unloading nonlinear mechanical characteristic of jointed rock mass[J]. Journal of Rock Mechanics and Geotechnical Engineering，2010，2(4)：357–364. [23] 尤明庆．基于黏接、摩擦承载特性对岩石变形破坏的研究[J]. 地质力学学报，2005，11(3)：288–292.(YOU Mingqing. Study of deformation and failure of rock based on properties of cohesion and friction[J]. Journal of Geomechanics，2005，11(3)：288–292.(in Chinese)) [24] 石祥超，孟英峰，李皋. 几种岩石强度准则的对比分析[J]. 岩土力学，2011，32(增1)：209–216.(SHI Xiangchao，MENG Yingfeng，LI Gao. Comparative analyses of several rock strength criteria[J]. Rock and Soil Mechanics，2011，32(Supp.1)：209–216.(in Chinese)) [25] 张流，王绳祖，施良骐. 我国六种岩石在高围压下的强度特性[J]. 岩石力学与工程学报，1985，4(1)：10–19.(ZHANG Liu，WANG Shengzu，SHI Liangqi. The strength of the characteristics of six types of rocks under high confining pressures[J]. Chinese Journal of Rock Mechanics and Engineering，1985，4(1)：10–19.(in Chinese)) [26] BYERLEE J D. The frictional characteristics of Westerly granite[Ph. D. Thesis][D]. US：Massachusetts Institute of Technology，1966：147–148. [27] SWANSON S R，BROWN W S. An observation of loading path independence of fracture in rock[J]. International Journal of Rock Mechanics and Mining Sciences，1971，8(3)：277–231. [28] FAIRHURST C E，HUDSON J A. Draft ISRM suggested method for the complete stress-strain curve for the intact rock in uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(3)：279–289. [29] 尤明庆，邹友峰. 关于岩石非均质性与强度尺寸效应的讨论[J]. 岩石力学与工程学报，2000，19(3)：391–395.(YOU Mingqing，ZOU Youfeng. Discussion on heterogeneity of rock material and size effect on specimen strength[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：391–395.(in Chinese)) [30] BHAT H S，SAMMIS C G，ROSAKIS A J. The micromechanics of westerly granite at large compressive loads[J]. Pure and Applied Geophysics，2011，168(12)：2 181–2 198.