岩体结构面三维粗糙度评价的新方法

doi:10.13722/j.cnki.jrme.2016.0951

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Abstract The reason of taking the potential contact area of rock mass discontinuity(RMD) as the important factor of surface roughness evaluation was explained theoretically in order to obtain the evaluation index with a clear geometric meaning. was put forward as a new evaluation index，which was associated with the mechanical properties. Two projection areas of the RMD surface were calculated，one was the projection of potential contact area on the plane which was perpendicular to the shear direction，the other was the projection of the whole RMD surface on the horizontal plane. is the area ratio of the former to the latter. The three-dimensional(3D) geometry information of the RMD in the shear direction was embodied by ，which was an anisotropic index. Based on the 3D laser scanning technology and Matlab programming，the 3D geometric model of the RMD was built and was calculated. The computational process and anisotropy of were presented via the engineering examples. A series of of the RMD models built with different elaborate degrees were studied，and the results showed that increased with the increasing of the elaborate degrees of models. The comparison between the results from Grasselli?s evaluation method and method showed that these two methods are similar. Furthermore，a good relationship was established between and the shear strength of the RMD，which laid the foundation for further study on the shear strength evaluation model of the RMD.

Key words： rock mechanics rock mass discontinuity shear failure mechanism three-dimensional surface roughness three-dimensional laser scanning technique

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	Articles by authors
	CAI Yi
	TANG Huiming
	GE Yunfeng
	ZHANG Shen
	TAN Qinwen

Cite this article:

CAI Yi,TANG Huiming,GE Yunfeng, et al. A new method for evaluating the roughness of three-dimensional discontinuity surface of rock[J]. , 2017, 36(5): 1101-1110.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0951 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I5/1101

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