断裂岩石双翼表面细观接触特征与剪切强度关系

doi:10.13722/j.cnki.jrme.2014.0006

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Abstract The shear strength of fractured rocks is of great importance for the stability prediction of rock mass. In order to investigate the relationship of the contact configuration from micro scope of double rough surfaces in contact with the shear strength of fractured rocks，the creep shear tests are carried out for fractured rocks induced by compressive shear and indirect tension. By means of laser scanning image procession and the geometric reconstruction of the double rough surfaces in fractured rocks， and through“slice-island method”，the contact configuration and contact area are analyzed. The study shows that the contact shape displays an irregular“coast line”style for compressive shear fractures and“scattered islands”style for tensile fractures in rocks. The contact area for tensile fractured rocks is significantly greater than that for compressive shear fractured rocks. Although the formation mechanism of the fractured rocks is different，or even the applied normal forces are at different levels，the creep shear strength is directly proportional to the contact area，implying that the contact area can be a candidate index in evaluation of the influence of surface roughness to the shear strength of fractured rocks. The results remain a referential value in construction of the contact constitutive model as well as of shear strength criterion for the fracture rocks.

Key words： Fractured rocks Rough surface Micro-contact Shear strength

Received: 06 January 2014

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.0006 OR http://www.rockmech.org/EN/Y2015/V34/I08/1522

[2]	BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics，1977，10(1-2)：1-54. " target="_blank">
[5]	LADANYI B，ARCHAMBAULT G. Simulation of shear behavior of a jointed rock mass[C]. Proc. of the 11th U.S. Symposium on Rock Mechanics(USRMS). Berkeley：American Rock Mechanics Association，1969：105-125. " target="_blank">
[7]	BROWN S R，SCHOLZ C H. Closure of random elastic surfaces in contact[J]. Journal of Geophysical Research，1985，90(B7)：5 531-5 545. " target="_blank">
[9]	COOK N G W. Natrual joints in rock：mechanical，hydraulic and seismic behavior and properties under normal[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1992，29(3)：198-223. " target="_blank">
[11]	ZHAO J. The joint matching coefficient(JMC) of rock joints[C]. Proc. of International Symposium on Tunnelling for Water Resources and Power Projects. Delhi：Central Board of Irrigation and Power，1988：21-27. " target="_blank">
[1]	BYERLEE J. Friction of rocks[J]. Pure and Applied Geophysics，1978，116(4-5)：615-626. " target="_blank">
[3]	EINSTEIN H H，BRUHN R W，Hirschfeld R C. Mechanics of jointed rock-experimental and theoretical studies[M]. Cambridge：M.I.T. Dept. of Civil Engineering，1970. " target="_blank">
[4]	SAEB S，AMADEI B. Modeling rock joints under shear and normal loading[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1992，29(3)：267-278. " target="_blank">
[6]	GREENWOOD J A，WILLIAMSON J B P. Contact of nominally flat surfaces[C]. Proc. of the Royal Society. London：Royal Society Publishing，1966：300-319. " target="_blank">
[8]	BROWN S R，SCHOLZ C H. Closure of rock joints[J]. Journal of Geophysical Research，1986，91(B5)：4 939-4 948. " target="_blank">
[10]	XIE H P，WANG J A，XIE W H. Photoelastic study of the contact mechanics of fractal joints[J]. International Journal of Mechanics and Mining Sciences，1997，34(5)：865-874. " target="_blank">
[12]	ZHAO J. Joint surface matching and shear strength part B：JRC-JMC shear strength criterion[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(2)：179-185. " target="_blank">
[13]	赵坚. 岩石节理剪切强度的JRC-JMC新模型[J]. 岩石力学与工程学报，1998，(4)：1-9.(ZHAO Jian. A new JRC-JMC shear strength criterion for rock joint[J]. Chinese Journal of Rock Mechanics and Engineering，1998，(4)：1-9.(in Chinese)) " target="_blank">
[17]	孙辅庭，佘成学，万利台. 新的岩石节理粗糙度指标研究[J]. 岩石力学与工程学报，2013，32(12)：2 513-2 519.(SUN Futing，SHE Chengxue，WAN Litai. Research on a new roughness index of rock joint[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2 513-2 519.(in Chinese))
[19]	赵松柏，谌海云，陈普春，等. 基于MATLAB的不规则面积图像测量[J]. 自动化技术与应用，2012，31(9)：15-16.(ZHAO Songbai，CHEN Haiyun，CHEN Puchun et al. The irregular image area measurement based on MATLAB[J]. Techniques of Automation and Applications，2012，31(9)：15-16.(in Chinese)) " target="_blank">
[14]	WANG J A，KWASNIEWSKI M A. Modeling of Mechanical Behavior of Fractal Rock Joint[J]. Journal of University of Science and Technology Beijing，1999，6(3)：157-164. " target="_blank">
[15]	沈明荣，张清照. 规则齿型结构面剪切特性的模型试验研究[J]. 岩石力学与工程学报，2010，29(4)：713-719.(SHEN Mingrong，ZHANG Qingzhao. Experimental study of shear deformation characteristics of rock mass discontinuities[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：713-719.(in Chinese))
[18]	王金安，李飞，曹秋菊等. 断裂岩石蠕剪中的细观接触损伤试验研究[J]. 岩土力学，2013，34(12)：3 345-3 352.(WANG Jinan，LI Fei，CAO Qiuju，et al. Experimental study of the micro- contact damage of fracture rocks in creep shear[J]. Rock and Soil Mechanics，2013，34(12)：3 345-3 352.(in Chinese))
[16]	沈明荣，谌洪菊，张清照. 基于蠕变试验的结构面长期强度确定方法[J]. 岩石力学与工程学报，2012，31(1)：1-7.(SHEN Mingrong，CHEN Hongju，ZHANG Qingzhao. Method for determining long-term strength of discontinuity using shear creep test[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(1)：1-7.(in Chinese))
[20]	曹秋菊，王金安. 断裂岩石粗糙性与岩体抗剪强度和机理的实验研究[J]. 中国矿业，2012，21(5)：108-111.(CAO Qiuju，WANG Jinan. Experimental study on roughness and Shear strength of fractured rock[J]. China Mining Magazine，2012，21(5)：108-111.(in Chinese))