收稿日期: 2016-02-26
修回日期: 2016-03-25
网络出版日期: 2017-01-22
基金资助
国家自然科学基金项目“冲击载荷下岩石节理本构方程及其对应力波传播的影响”(编号:41372278)资助
Analysis on Changes of Surface Morphological Characteristics of Joint Under Compression Closed Testing
Received date: 2016-02-26
Revised date: 2016-03-25
Online published: 2017-01-22
岩石节理表面形貌对于岩石的力学性质具有重要的影响。为了研究节理表面形貌在法向压缩作用下的变化规律,对节理试样进行了压缩闭合试验。运用三维高精度激光形貌仪(Talysurf CLI 2000)对试验前后节理表面分别进行扫描,获得了二维和三维形貌特征图,并选取节理表面最大峰高(Sp)、表面最大高度(Sz)、表面最大谷深(Sv)、峰度系数(Sku)、偏斜度系数(Ssk)、均方根高度(Sq)和算术平均高度(Sa)共7个表面形貌高度特征参数进行分析。研究发现:Sp、Ssk、Sk在法向应力的作用下有所减小,但是减幅均较小;Sv在压缩闭合试验后减小明显;Sz变化规律类似;Sa和Sq在压缩闭合后基本呈增大趋势。由此可见,节理表面形貌对节理压缩闭合曲线有明显的影响。
王卫华 , 李坤 , 严哲 , 唐修 . 节理压缩闭合试验前后表面形态特征变化分析[J]. 黄金科学技术, 2016 , 24(6) : 84 -89 . DOI: 10.11872/j.issn.1005-2518.2016.06.084
The surface topography of rock joints has an important influence on the mechanical properties of rock.In order to study the change law of joint surface topography under normal compression,the compression tests were carried out on joints specimens.Joint surfaces were scanned by using 3D high precision laser profilometer (Talysurf CLI2000) before and after the experiments and 2D and 3D morphology characteristics map were obtained.And surface morphology feature height parameters are selected,including the maximum peak of the joint surface,high Sp,the maximum height SZ,maximum valley deep Sv,kurtosis coefficient Sku,partial slope coefficient Ssk,mean square height Sq,arithmetic mean height Sa.It is found that the Sp,Ssk,Sku decrease under normal stress,but decrease amplitude is smaller;SV decreases obviously under the compression closing test;Sz variation law is similar with above;Sa and Sq were increased after testing.The surface morphology of the joints has a significant effect on the closed curve of the joints.
[1] 贾洪强.岩石节理面表面形态与剪切破坏特性的实验研究[D].长沙:中南大学,2011.
[2] 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.
[3] 曹平,周罕,范祥,等.剪切作用下节理表面形貌变化[J].科技导报,2011,29(28):46-51.
[4] 李海波,刘博,冯海鹏,等.模拟岩石节理试样剪切变形特征和破坏机制研究[J].岩土力学,2008,29(7):1741-1752.
[5] 杜守继,朱建栋,职洪涛.岩石节理经历不同变形历史的剪切试验研究[J].岩石力学与工程学报,2006,25(1):56-60.
[6] Jafari M K,Hosseini K A,Pellet F,et al.Evaluation of shear strength of rock joints subjected to cyclic loading[J].Soil Dynamics and Earthquake Engineering,2003,23(7):619-630.
[7] Jafari M K,Pellet F,Boulon M,et al.Experimental study of mechanical behaviour of rock joints under cyclic loading[J].Rock Mechanics and Rock Engineering,2004,37(1):3-23.
[8] Jing L,Stephansson O,Nordlund E.Study of rock joints under cyclic loading conditions[J].Rock Mechanics and Rock Engineering,1993,26(3):215-232.
[9] Lee H S,Park Y J,Cho T F,et al.Influence of asperity degradation on the mechanical behavior of rough rock joints under cyclic shear loading[J].International Journal of Rock Mechanics and Mining Sciences,2001,38(7):967-980.
[10]Unal M,Unver B.Characterization of rock joint surface degradation under shear loads[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(1):1-6.
[11]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,Geomechanics,2001,25(10):973-999.
[12] 夏才初,孙宗颀.工程岩体节理力学[M].上海:同济大学出版社,2002:41-42.
[13] Belem T,Ahomand E,Souley M.Quantitative parameters for rock joint surface roughness[J].Rock Mechanics and Rock Engineering,2000,33(4):217-242.
[14] 丁增志.节理表面形貌研究及在非贯通节理岩体强度准则中的应用[D].上海:同济大学,2007.
[15] 曹平,梅慧浩,宁果果,等.经历剪切变形历史的岩石节理表面形貌变化[J].铁道科学与工程学报,2012,9(2):99-104.
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