A New Method for Determination of Joint Roughness Coefficient of Rock Joints

A New Method for Determination of Joint Roughness Coefficient of Rock Joints
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测定岩石节理节理粗糙系数的新方法

DOI:
10.1155/2015/634573
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发表时间:
2015-11
影响因子:
--
通讯作者:
Zhao Hua
Zhao Hua
中科院分区:
工程技术4区
文献类型:
--
作者:
Gao Huicai;Hu Yunjin;Huang Man;Zhao Hua

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岩石节理粗糙度系数具有尺度效应的特点。由于野外岩石节理很难完全暴露或保存完好,因此,在小尺寸暴露岩石节理上测量的JRC应通过JRC尺度效应进行评估,以获得实际尺寸岩石节理的JRC。在JRC规模效应效度分析的基础上,提出了JRC规模效应率和JRC规模效应有效长度的概念。在此基础上,建立了确定JRC尺度效应有效长度的图解法。研究结果表明,根据小尺度部分裸露岩石节理JRC的统计测量结果,通过选取JRC尺度效应的分形维数和确定JRC尺度效应的有效长度,可以通过JRC尺度效应的分形模型得到实际尺度岩石节理的JRC。
The joint roughness coefficient (JRC) of rock joints has the characteristic of scale effect. JRC measured on small-size exposed rock joints should be evaluated by JRC scale effect in order to obtain the JRC of actual-scale rock joints, since field rock joints are hardly fully exposed or well saved. Based on the validity analysis of JRC scale effect, concepts of rate of JRC scale effect and effective length of JRC scale effect were proposed. Then, a graphic method for determination of the effective length of JRC scale effect was established. Study results show that the JRC of actual-scale rock joints can be obtained through a fractal model of JRC scale effect according to the statistically measured results of the JRC of small-size partial exposed rock joints and by the selection of fractal dimension of JRC scale effect and the determination of effective length of JRC scale effect.
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