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Method for evaluating three-dimensional roughness degree of rock mass structure face

An evaluation method and technology of structural surfaces, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of lack of theoretical reasoning in evaluation indicators, failure to consider directional factors in fractal methods, and connection of mechanical characteristics of structural surfaces, etc.

Active Publication Date: 2016-12-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

A considerable part of the existing roughness evaluation methods are proposed based on the two-dimensional profile of the structural surface, which cannot fully reflect the real situation of the structural surface, such as JRC; most mathematical statistics methods only start with a single geometric information, and do not have the mechanical properties of the structural surface. The parameters for evaluating the roughness of the structural surface are obtained through statistical analysis, and the evaluation index lacks theoretical reasoning; although the fractal dimension method can better characterize the irregularity and complexity of the structural surface shape, most fractal methods cannot consider the direction factor

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  • Method for evaluating three-dimensional roughness degree of rock mass structure face
  • Method for evaluating three-dimensional roughness degree of rock mass structure face
  • Method for evaluating three-dimensional roughness degree of rock mass structure face

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that embodiments of the present invention should not be limited to the exemplary embodiments described below, but should be controlled by the limitations set forth in the claims and any equivalents thereof.

[0038] 1) Sample selection and data collection:

[0039] In Chongqing Wulong Iron Mine Township, about 1km southeast of the township government, due to the instability and damage of the overlying rock mass, large-scale structural surfaces were exposed in a large area, which provided a good source of data for this study. The selected rock mass is dark gray medium-thick limestone with some vegetation on the surface. The type of structural plane belongs to layer, and the occurrence is about 350°∠30°. A large number of biodetritus fossils were found inside the rock mass, such as shellfish, ostracods, brachiopods, bryozoans, etc.,...

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Abstract

The invention provides a method for evaluating a three-dimensional roughness degree of a rock mass structure face. The method comprises the steps that a three-dimensional geometric model of the rock mass structure face is established, and the rock mass structure face is dispersed into a series of triangular micro elements based on a Delaunay triangulation algorithm; according to a shearing direction, possible parts at which contact may take place when shearing effects take place to the rock mass structure face are determined, namely potential contact micro elements are determined; a total projection area formed by all the potential contact micro elements of the rock mass structure face on the face perpendicular to the shearing direction is computed; and a ratio of the total projection area to a horizontal projection area of the rock mass structure face is computed, and the ratio is used to describe the three-dimensional roughness degree of the rock body structure face. According to the invention, in combination with a shear damage mechanism of the structure face, a roughness degree evaluation index with an explicit theoretical basis is acquired; and the index not only can reflect geometric morphology of the structure face in the shearing direction and consider anisotropy of the rock mass roughness degree, but can also has certain correlation with shear strength of the structure face, so that a shear strength estimation model can be served better.

Description

technical field [0001] The invention relates to a method for evaluating the roughness of a rock mass structural surface, belonging to the field of rock mass mechanical parameters. Background technique [0002] Rock mass structure plane refers to the material interface or discontinuity surface with certain direction, scale and shape developed inside the rock mass, such as layers, joints, faults, cracks and so on. The existence of structural planes makes the physical and mechanical properties of rock mass discontinuous, anisotropic, and heterogeneous, and also reduces the integrity and strength of rock mass. Therefore, the shear strength of the structural plane affects the overall mechanical properties of the rock mass. However, there are many factors affecting the shear strength of structural planes, such as lithology, roughness, connectivity, filling and cementation characteristics, etc. The purpose of the research on rock mass structural surface roughness is to establish ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 蔡毅唐辉明葛云峰谭钦文
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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