甘肃北山花岗岩岩体结构面粗糙度系数(JRC)研究

The measurement and application of joint roughness coefficient for rock mass of granite

岩体结构面表面形态研究对岩石工程结构体强度及变形特征研究评价具有重要的指导意义。文章评述了现有岩体结构面粗糙度系数(JRC)的各种测定方法及存在的问题,分析了在高放废物处置库预选场址甘肃北山花岗岩地区,用"简易纵剖面仪"进行地表岩体及钻孔岩心裂隙结构面JRC的测量结果。

The study on joint roughness coefficient of rock mass has important significance, especially on the safety assessment study of deep underground architectures. In this paper, the authors present several existing measurement methods of joint roughness coefficient （JRC）, and analyses the disadvantages of these methods. After that, the authors take Beishan of Gansu province for the HLW disposal area as the example, and measure the joint roughness coefficient （JRC） of surface rock mass and cores of borehole. According to analyzed results of these data, the study shows the relation of surface seesaw scope contour and joint roughness coefficient （JRC）, meanwhile, studies the rate of scale effect of JRC with the different length of joint surface. The study shows that the simple profile instrument has extensive application foreground.