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A general elliptical disk model method for characterizing rock mass fracture surfaces

A technology of rock mass fissures and elliptical disks, applied in 3D modeling, instruments, calculations, etc., can solve the problems of reduced applicability of the disk model and single parameters of the disk model, and achieve the effect of wide applicability

Active Publication Date: 2022-04-12
ZHEJIANG UNIV
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Problems solved by technology

Among the above models, the disc model has a single parameter and is easy to calculate, making it the most commonly used model
However, the fracture surfaces in nature are irregular rather than equidimensional, so the applicability of the disc model will be reduced

Method used

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  • A general elliptical disk model method for characterizing rock mass fracture surfaces
  • A general elliptical disk model method for characterizing rock mass fracture surfaces
  • A general elliptical disk model method for characterizing rock mass fracture surfaces

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings. The following specific implementation steps can make those skilled in the art understand the present invention more comprehensively, but do not limit the present invention in any form.

[0043] The method for characterizing a rock mass fracture surface by a general elliptical disk model according to the present invention includes the following steps:

[0044] 1. Center point distribution

[0045] The distribution of the center points of the cracks is the spatial distribution of the cracks in the rock mass. It is generally believed that the cracks are uniformly generated in the rock mass, so the Poisson distribution is usually used to describe the distribution of the center points of the cracks.

[0046] 2. Three-dimensional density

[0047] At present, the estimation of three-dimensional fracture density is mainly based on one-dimensional (borehole) or two-di...

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Abstract

The invention relates to the rock mass discrete fracture network technology, and aims to provide a method for characterizing the rock mass fracture surface with a general elliptical disk model. Including: characterization of central point distribution; characterization of three-dimensional density; characterization of size distribution; characterization of azimuth distribution; the characterization content can be further used to further generate a three-dimensional discrete fracture network through Monte Carlo simulation. Compared with the disc model and the traditional elliptical disc model, the present invention has wider applicability. Compared with the existing elliptical disk model, the present invention introduces the characterization of the orientation, uses a new parameter rotation angle, and couples the occurrence of the fracture surface, so that the probability density distribution function of the long axis direction of the elliptical disk can be constructed.

Description

technical field [0001] The invention relates to the field of rock mass discrete fracture networks, in particular to a method for characterizing rock mass fracture surfaces by a general elliptical disk model. Background technique [0002] A rock mass is composed of rock and structural planes. The structural planes refer to discontinuous planes with extremely low or no tensile strength, including fissures, joints, faults, etc. The size, orientation, density and other geometric features of the structural plane have an extremely important influence on the deformation, strength and permeability of the rock mass. In nature, the fracture surface is buried in the rock body, and it is difficult to measure the geometric characteristics of all fractures. Therefore, the currently widely used method is to infer the three-dimensional characteristics of the fracture through one-dimensional measurement along the sampling line and two-dimensional natural outcrops. , thereby constructing a t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05
CPCG06T17/05
Inventor 郑俊郭吉超王嘉伟田哲祺吕庆
Owner ZHEJIANG UNIV
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