随机形貌岩石节理剪切破坏分析
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摘要
基于三维高精度形貌扫描技术和节理剪切试验及数值模拟,研究随机形貌岩石节理剪切的节理表面破坏过程及机理。利用自定义参数(节理面破坏量Vd、破坏增量Vd-inc)定量分析节理面破坏过程,并基于节理表面破坏特征将随机形貌岩石节理剪切破坏过程细化为6个基本阶段。研究结果表明:节理表面破坏开始于破坏起始阶段,主要发生在整体破坏阶段,节理面整体破坏阶段的破坏量占整个剪切过程总破坏量的70%以上。节理表面破坏主要为剪胀伴随凸起体顶部剪断和沿凸起体根部剪断,前者比后者更迅速。节理面凸起体根部易产生拉伸裂纹,但整体破坏形式以剪切破坏为主。
The shear failure process and mechanism of Joint surface with random morphology rock joint was investigated,based on 3D high precision morphology scanning technique and joint shear test and numerical simulation.Damage evolution process of joint surface was quantitative analysis using the failure quantity(Vd) and the failure increment(Vd-inc),and the shear process of random morphology rock joint was divided into six basic stage based on the joint surface damage evolution characteristics.The results show that the joint surface damage begin in initial stage of destruction,and mainly in the whole failure stage,joint surface damage in the whole failure stage account for more than 70% of the whole shear process.Joint surface damage mainly the dilation with shearing at the top of the convex and the shearing along the convex root,and the former is more rapid than the latter.
The shear failure process and mechanism of Joint surface with random morphology rock joint was investigated,based on 3D high precision morphology scanning technique and joint shear test and numerical simulation.Damage evolution process of joint surface was quantitative analysis using the failure quantity(Vd) and the failure increment(Vd-inc),and the shear process of random morphology rock joint was divided into six basic stage based on the joint surface damage evolution characteristics.The results show that the joint surface damage begin in initial stage of destruction,and mainly in the whole failure stage,joint surface damage in the whole failure stage account for more than 70% of the whole shear process.Joint surface damage mainly the dilation with shearing at the top of the convex and the shearing along the convex root,and the former is more rapid than the latter.
引文
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[19]曹日红,曹平,林杭,等.不同粗糙度的节理直剪颗粒流分析[J].岩土力学,2013,34(增2):456-463.CAO Rihong,CAO Ping,LIN Hang,et al.Particle flow analysis of direct shear tests on joints with different roughnesses[J].Rock and Soil Mechanics,2013,34(Suppl 2):456-463.
[20]Nguyen V M,Konietzky H,Frühwirt T.New methodology to characterize shear behavior of joints by combination of direct shear box testing and numerical simulations[J].Geotechnical and Geological Engineering,2014,32(4):829-846.
[21]沈华章,王水林,刘泉声.模拟应变软化岩石三轴试验过程曲线[J].岩土力学,2014,35(6):1647-1654.SHEN Huazhang,WANG Shuilin,LIU Quansheng.Simulation of constitutive curves for strain-softening rock in triaxial compression[J].Rock and Soil Mechanics,2014,35(6):1647-1654.
[22]Bandis S,Lumsden A C,Barton N R.Experimental studies of scale effect on the shear behaviour of rock joints[J].International Journal of Rock Mechanics&Mining Sciences Geomechanics Abstracts,1981,20:249-268.
[23]Vallier F,Mitani Y,Boulon M,et al.A Shear model accounting scale effect in rock joints behavior[J].Rock Mechanics and Rock Engineering,2010,43(5):581-595.
[2]Belem T,Homand-Etienne F,Souley M.Quantitative parameters for rock joint surface roughness[J].Rock Mechanics and Rock Engineering,2000,33(4):217-242.
[3]Homand F,Belem T,Souley M.Friction and degradation of rock joint surfaces under shear loads[J].International Journal for Numerical and Analytical Methods in Geomechanics,2001,25(10):973-999.
[4]Riss J,Gentier S,Sirieix C,et al.Degradation characterization of sheared joint wall surface morphology[C]//Proceedings of the 2nd North American Rock Mechanics Symposium.[S.l.]:[s.n.],1996:1343-1349.
[5]曹平,范祥,蒲成志,等.节理剪切试验及其表面形貌特征变化分析[J].岩石力学与工程学报,2011,30(3):480-485.CAO Ping,FAN Xiang,PU Chengzhi,et al.Shear test of joint and analysis of morohology characteristic evolution of joint surface[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):480-485.
[6]曹平,贾洪强,刘涛影,等.岩石节理表面三维形貌特征的分形分析[J].岩石力学与工程学报,2011,30(增2):3839-3843.CAO Ping,JIA Hongqiang,LIU Taoying,et al.Fractal analysis of three-dimensional topography characteristics of rock joint surface[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(Suppl 2):3839-3843.
[7]曹平,何云,范祥,等.剪切前后节理表面形貌纹理特征变化[J].中南大学学报,2013,44(11):4624-4630.CAO Ping,HE Yun,FAN Xiang,et al.Evolution of morphology texture characteristics based on rock joints shear tests[J].Journal of Central South University,2013,44(11):4624-4630.
[8]Grasselli G.Shear strength of rock joints based on quantified surface description[D].Switzerland:Swiss Federal Institute of Technology,2001.
[9]夏才初,唐志成,宋英龙.基于三维形貌参数的偶合节理峰值抗剪强度公式[J].岩石力学与工程学报,2013,32(增1):2833-2839.XIA Caichu,TANG Zhicheng,SONG Yinglong.A new peak shear strength formula for matching irregular joints based on 3D morphology parameters[J].Chinese Journal of Rock Mechanics and Engineering,2011,32(Suppl 1):2833-2839.
[10]唐志成,黄润秋,张建明,等.含坡度均方根的节理峰值剪切强度经验公式[J].岩土力学,2015,36(12):3433-3438.TANG Zhicheng,HUANG Runqiu,ZHANG Jianming,et al.Empirical peak shear strength criterion for rock joints based on slope root-mean-square[J].Rock and Soil Mechanics,2015,36(12):3433-3438.
[11]王金安,谢和平.岩石节理面在剪切中表面损伤的分形演化[J].力学与实践,1997,19(4):56-58,55.WANG Jinan,XIE Heping.Fractal evolution of surface damage of rock joints during shearing[J].Mechanics in Engineering,1997,19(4):56-58,55.
[12]杜守继,江崎哲郎,蒋宇静,等.岩石节理的剪切破坏特性的定量分析[C]//中国岩石力学与工程学会第五次学术大会论文集.北京:中国科学技术出版社,1998:239-244.DU Shouji,Tetsuro E,JIANG Yujing,et al.The quantitative evaluation of surface damage of rock joint during shear processes[C]//The 7th Academic Congress of Chinese Society for Rock Mechanics and Engineering.Beijing:China Science and Technology Press,1998:239-244.
[13]LI Kaihui,CAO Ping,ZHANG Ke,et al.Macro and meso characteristics evolution on shear behavior of rock joints[J].Journal of Central South University,2015,22(8):3087-3096.
[14]余华中,阮怀宁,褚卫江.岩石节理剪切力学行为的颗粒流数值模拟[J].岩石力学与工程学报,2013,32(7):1482-1490.YU Huazhong,RUAN Huaining,CHU Weijiang.Particle flow code modeling of shear behavior of rock joints[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(7):1482-1490.
[15]余华中,阮怀宁,褚卫江.弱化节理剪切力学特征的颗粒流模拟研究[J].岩土力学,2016,37(9):2712-2720.YU Huazhong,RUAN Huaining,CHU Weijiang.Particle flow modeling of shear character of weakened joint[J].Chinese Journal of Rock Mechanics and Engineering,2016,37(9):2712-2720.)
[16]夏才初,宋英龙,唐志成,等.粗糙节理剪切性质的颗粒流数值模拟[J].岩石力学与工程学报,2012,31(8):1545-1552.XIA Caichu,SONG Yinglong,TANG Zhicheng,et al.Particle flow numerical simulation for shear behavior of rough joints[J].Rock and Soil Mechanics,2012,31(8):1545-1552.
[17]宋英龙,夏才初,唐志成,等.不同接触状态下粗糙节理剪切强度性质的颗粒流数值模拟和试验验证[J].岩石力学与工程学报,2013,32(10):2028-2035.SONG Yinglong,XIA Caichu,TANG Zhicheng,et al.Numerical simulation and test validation for direct shear properties of rough joint under different contact states[J].Rock and Soil Mechanics,2013,32(10):2028-2035.
[18]周喻,Misra A,吴顺川,等.岩石节理直剪试验颗粒流宏细观分析[J].岩石力学与工程学报,2012,31(6):1245-1256.ZHOU Yu,Misra A,WU Shunchuan,et al.Macro and meso-analyses of rock joint direct shear test using particle flow theory[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1245-1256.
[19]曹日红,曹平,林杭,等.不同粗糙度的节理直剪颗粒流分析[J].岩土力学,2013,34(增2):456-463.CAO Rihong,CAO Ping,LIN Hang,et al.Particle flow analysis of direct shear tests on joints with different roughnesses[J].Rock and Soil Mechanics,2013,34(Suppl 2):456-463.
[20]Nguyen V M,Konietzky H,Frühwirt T.New methodology to characterize shear behavior of joints by combination of direct shear box testing and numerical simulations[J].Geotechnical and Geological Engineering,2014,32(4):829-846.
[21]沈华章,王水林,刘泉声.模拟应变软化岩石三轴试验过程曲线[J].岩土力学,2014,35(6):1647-1654.SHEN Huazhang,WANG Shuilin,LIU Quansheng.Simulation of constitutive curves for strain-softening rock in triaxial compression[J].Rock and Soil Mechanics,2014,35(6):1647-1654.
[22]Bandis S,Lumsden A C,Barton N R.Experimental studies of scale effect on the shear behaviour of rock joints[J].International Journal of Rock Mechanics&Mining Sciences Geomechanics Abstracts,1981,20:249-268.
[23]Vallier F,Mitani Y,Boulon M,et al.A Shear model accounting scale effect in rock joints behavior[J].Rock Mechanics and Rock Engineering,2010,43(5):581-595.