基于Barton标准剖面线精细数字化处理的岩石节理JRC计算新公式研究

doi:10.13722/j.cnki.jrme.2017.0974

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Abstract

Taking ten standard joint profiles proposed by Barton as an object，professional image processing softwares PHOTOSHOP and MATLAB were firstly used to digitize the image of ten standard JRC profiles by removing stray dots located close to the profiles and interpolating pixels between discontinuities in the profiles，then accurate coordinates data of ten standard joint profiles were obtained. On this basis，the root mean square of slope Z₂ and amplitude parameter h_A of the standard profiles were calculated at different sampling intervals，and a new empirical equation between JRC and Z₂ and h_Awas established. Then the new equation，as well as other commonly-used empirical equations，were employed to calculate the JRC values of ten standard profiles and some natural rock joint profiles. The predictions of JRC were compared with the back-analysis values from shear tests，from which it can be concluded that the prediction accuracy of the new empirical equation is greater than that of the former empirical equations，and it has a good prospect in engineering applications.

Key words： rock mechanics rock joint standard joint profile joint roughness coefficient(JRC) digitization

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	LI Rui1
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	XIAO Weimin1
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Cite this article:

LI Rui1,2,XIAO Weimin1, et al. Study on a new equation for calculating JRC based on fine digitization of standard profiles proposed by Barton[J]. , 2018, 37(S1): 3515-3522.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0974 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3515

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