Microscomic numerical model generation method considering rock structure characteristics and mineral composition

A numerical model and structural feature technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve problems such as the inability to consider the irregular shape and arrangement of rock mineral particles, and the inability to fully reflect the rock microstructure, etc. Good versatility and high computational efficiency

Active Publication Date: 2019-07-30
WUHAN UNIV
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Problems solved by technology

[0010] However, the above methods cannot fully reflect the microstructure of rocks. They can only consider the mineral composition and mineral content of rocks, and cannot consider the irregular shape and arrangement structure of rock mineral particles. Model

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  • Microscomic numerical model generation method considering rock structure characteristics and mineral composition
  • Microscomic numerical model generation method considering rock structure characteristics and mineral composition
  • Microscomic numerical model generation method considering rock structure characteristics and mineral composition

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Embodiment Construction

[0054] A method for generating a mesoscopic numerical model considering rock structure characteristics and mineral composition involved in the present invention will be described in detail below with reference to the accompanying drawings. Parts not described in detail in the following embodiments belong to the prior art.

[0055]

[0056] Such as figure 1 As shown, the method for generating a mesoscopic numerical model considering rock structure characteristics and mineral composition involved in the present invention can be divided into 4 processes: rock structure characteristic analysis 1, particle size expansion method 2, spatial region division 3 based on Voronoi diagram, and Generate finite element model 4.

[0057] Such as figure 1 and 2 As shown, rock structure feature analysis 1 may specifically include: rock sample slice 11 , slice microscopic observation 12 , mineral grain boundary identification 13 , grain geometric information extraction 14 , and grain geomet...

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Abstract

The invention discloses a microscomic numerical model generation method considering rock structure characteristics and mineral composition. Microscopic structure characteristics and mineral composition of rock can be considered, a microscopic numerical model reflecting the rock structure characteristics and the mineral composition is established, and rock mechanics numerical simulation can be carried out more truly. The method comprises the following steps: carrying out rock structure characteristic analysis on a rock sample to obtain the size, form, mineral type and other information of mineral particles; simplifying the mineral particles with irregular shapes into balls with reduced sizes, and rearranging the particles by adopting a particle size expansion method, and obtaining a compact structure; secondly, extracting information such as spatial positions and sizes of particles, and performing Voronoi graph-based spatial region division on the particle assembly; and finally, performing finite element mesh division on the obtained Voronoi polycrystal structure, and inserting thickness-free interface units into mineral particle boundaries and the interiors of particles to generate a finite element numerical model capable of reflecting a rock structure and a lithofacies structure.

Description

technical field [0001] The invention belongs to the field of rock mechanics research, and in particular relates to a method for generating a mesoscopic numerical model considering rock structure characteristics and mineral composition. Background technique [0002] Rocks are the basic components of the earth's crust, and they are exposed in large quantities on the surface, forming mountains and valleys, and are the basic carrier and environment of human engineering activities. Rock is composed of one or several minerals, solid aggregates with stable shape, and minerals have certain chemical composition and crystal structure. Rock structure refers to the characteristics shown by the degree of crystallization, the size of mineral grains, the relative size of mineral grains, the shape of mineral grains and the relationship between them. According to the degree of crystallization of rocks, the structure can be divided into three categories: full crystalline structure, semi-crys...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 马刚姬翔周伟常晓林
Owner WUHAN UNIV
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