工程地质学报2024，Vol.32Issue(6)：2072-2084,13.DOI:10.13544/j.cnki.jeg.2023-0261
岩体结构面两级粗糙度各向异性特征量化表征的间距效应研究
STUDY ON SAMPLING INTERVAL EFFECT IN QUANTITATIVE CHARAC-TERIZATION OF TWO-ORDER ROUGHNESS ANISOTROPY FEATURES OF ROCK STRUCTURAL PLAN
摘要
Abstract
Three-dimensional morphology of the macroscopic undulation component and asperities of rock joints can directly affect the shear mechanical properties.Understanding the two-order roughness anisotropy features of joint surfaces at different sampling intervals is important to recognize the shear failure mechanism of rock mass.In view of the fact that there are few studies on the anisotropy characteristics of two-order roughness of rock joints at present,the two-order roughness components based on limit sampling interval morphological classification method are ob-tained,and the anisotropy coefficient RAC3Dconsidering the dominant and disadvantageous directions of roughness is proposed.The anisotropy coefficients of the two-order roughness of three joint samples at different sampling intervals based on point cloud sparse method are calculated.The results show that the anisotropy coefficient of the second-or-der roughness first increases and then rapidly decreases with sampling interval increase,and has a good quadratic polynomial fitting relationship with sampling interval.The interval effect of roughness anisotropy coefficients on first-order roughness is not obvious at a small sampling interval.When the interval exceeds the limit sampling interval,anisotropy coefficient decays rapidly and has a negative numerical power function with the sampling interval.The a-nalysis of the two-order roughness morphology geometry of the rock joints shows that the speed of the roughness at-tenuation rate in the advantage and weakness directions with the sampling interval increase is the key factor that causes the variation of the anisotropy coefficients of two-order roughness.The more obvious the anisotropy character-istics of joint surfaces roughness are,the more influenced they are by the variation of sampling interval.This paper can provide a reference for the study of the sampling interval effect on the two-order roughness anisotropic features of rock joints.关键词
结构面/两级粗糙度/宏观起伏体/粗糙度各向异性系数/间距效应Key words
Structural plane/Two-order roughness/Macroscopic undulation component/Roughness anisotropy coefficient/Sampling interval effect分类
建筑与水利引用本文复制引用
任昱行,许文涛,张诗淮,马晓冬..岩体结构面两级粗糙度各向异性特征量化表征的间距效应研究[J].工程地质学报,2024,32(6):2072-2084,13.基金项目
国家自然科学基金项目(资助号:42402288),江苏省自然科学基金项目(资助号:BK20241206),中国博士后科学基金项目(资助号:GZB20230298),深部岩土力学与地下工程国家重点实验室开放基金项目(资助号:SKLGDUEK2213).This research is supported by the National Natural Science Foundation of China(Grant No.42402288),the Natural Science Foundation of Jiangsu Province(Grant No.BK20241206),the Postdoctoral Fellowship Program(Grant No.GZB20230298)and Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining & Technology(Grant No.SKLGDUEK2213). （资助号:42402288）
