摘要
岩石断裂面的特征研究是岩石断裂理论的基本问题之一,但是对成对断面特征认识较少。基于数字图像技术,针对成对断面的异同及特征进行研究。给出数字图像技术基本原理与方法,提出岩石断面数字图像的标准化方法、对比判断准则、处理流程。开展6组花岗岩巴西圆盘劈裂试验,对成对断面进行了基于R、G、B和灰度分量的特征分析。结果表明:(1)数字图像技术可应用于成对断面特征分析中;(2)对于花岗岩巴西圆盘劈裂试验,单断面R、G、B、Y分量分布规律一致,符合高斯线性组合,成对断面之间的R、G、B、Y分量分布差异明显;(3)巴西圆盘劈裂试验下,对于A类花岗岩试样,从岩石不同组分中断裂约占21. 1%~23. 0%,B类花岗岩约为33%~38%,C类花岗岩约为37. 5%~43. 9%。结论利于深化对岩石成对出现的断面特征差异的认识,同时对于数值分析中的损伤断裂分析中的微观参数设定、最终断面形态及断裂路径具有重要的参考价值。
The characteristics of rock fracture surface is one of the basic problems of rock fracture theory,but there is few research on couple fracture surfaces.Based on digital image technology,this paper studies the similarities and differences of the couple fracture surfaces.The basic principle and method of digital image technology are given,and the standardization method,comparison judgment criterion of the digital image of the rock section are presented.Six groups of granite Brazilian disk tests are performed,and the couple fracture surfaces are analyzed based on the characteristics of R,G,B and gray components.The results show that:①digital image technology can be applied in the analysis of couple fracture surfaces;②For granite,R,G,B,Y component distribution are in agreement,following the gaussian linear combination.However,R,G,B,Y component distribution of the couple fracture surfaces are different;③For the type A granite,difference between the couple fracture surfaces is about 21.1%~23.0%,the type B is about 33%~38%,and the type C was about 37.5%~43.9%.The research will provide reference value for the numerical analysis of rock fracture,microscopic parameters setting,and final fracture path.
作者
王海军
钟凌伟
任然
汤雷
万思豪
WANG Haijun;ZHONG Lingwei;REN Ran;TANG Lei;WAN Sihao(Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resourcesand Hydraulic Engineering,Nanjing 210029,China;Hohai University,Nanjing 210098,China;City University of Hong Kong,Hong Kong 999077,China)
出处
《人民珠江》
2018年第11期14-21,共8页
Pearl River
基金
国家重点研发计划项目(2016YFC0401801)
国家自然科学基金(51409170,51739008)
江苏省自然科学基金(BK20171130)
中央级公益性科研院所基本科研业务费项目(Y417016,Y417007)
关键词
岩石力学
断裂面特征
花岗岩
数字图像
骨颗粒
rock mechanics
fracture surface characteristics
granite
digital image
bone particles
