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Method for generating stratified rock-containing mineral crystal model

A mineral crystal and model technology, applied in the field of rock bedding structure research, can solve the problems of affecting calculation efficiency, inability to simulate bedding structure, and many mineral crystal particles, and achieve the effect of reducing the number and improving calculation efficiency

Active Publication Date: 2021-12-31
POWERCHINA CHENGDU ENG
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Problems solved by technology

However, for bedding-bearing rocks formed by minerals in a directional manner, such as the striped bedding structure formed by biotite in mixed gneiss, the above method cannot simulate the bedding structure; or cannot generate randomly distributed bedding rocks; Or use the cluster method to generate bedding structure, but there are too many mineral crystal particles, which greatly affects the calculation efficiency

Method used

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  • Method for generating stratified rock-containing mineral crystal model
  • Method for generating stratified rock-containing mineral crystal model
  • Method for generating stratified rock-containing mineral crystal model

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[0059] A mixed gneiss is composed of three mineral crystals: alkaline feldspar crystals, quartz crystals and biotite crystals. The average particle sizes of the three mineral crystals are 3mm, 1mm and 0.5mm, and the contents are 47%, 38% and 15%, and biotite mineral crystal directional combination forms bedding structure. Taking UDEC software as an example, the mineral crystal model of the rock under uniaxial compression test is generated.

[0060] Create a single block: the size of the rock sample under the uniaxial compression test is φ50mm×100mm (diameter×height), use the BLOCK command to generate a single block see figure 2 .

[0061] Division of bedding areas and non-bedding areas: Assume that the bedding formed by biotite crystals is horizontal, and the width of each bedding is 0.5mm to 1.5mm (in line with uniform distribution), randomly distributed in the block, and adjacent bedding The spacing is not less than 3mm. Use FISH language to write related functions, and ...

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Abstract

The invention relates to the field of rock stratification, in particular to a method for generating a stratified rock-containing mineral crystal model, which realizes rapid simulation of a randomly distributed stratified structure consisting of mineral crystals, greatly reduces the number of particles in a calculation model and improves the calculation efficiency. According to the technical scheme, the method comprises the steps of conducting structural observation and statistics on mineral crystals containing stratified rocks, determining the types, the particle sizes and the content of the mineral crystals, and meanwhile determining the width of the stratified structure of the mineral crystals, the distribution rule of the stratified structure and the spatial distribution characteristics of the stratified structure; generating a single block in a specified area according to observation and statistics results; dividing the single block into a stratified area and a non-stratified area, and generating a first mineral crystal model according to the mineral crystal particle size of the stratified area; and generating a second mineral crystal model according to the maximum particle size of the mineral crystals in the non-stratified area. The method is suitable for rapidly simulating the stratified rock structure which is randomly distributed and composed of mineral crystals.

Description

technical field [0001] The invention relates to the field of research on rock bedding structures, in particular to a method for generating a mineral crystal model of rocks containing bedding. Background technique [0002] Rock is a complex geological material cemented by a variety of mineral particles, showing obvious discontinuity, heterogeneity, anisotropy and other characteristics. However, traditional numerical simulation methods, such as finite element method and finite difference method, use elastic or elastoplastic constitutive models to simulate the stress-strain relationship of rocks, which is difficult to accurately express the highly nonlinear mechanical characteristics of rocks. Therefore, it has become a general trend to study the mechanical behavior of rocks from the mesoscopic level. The discrete element method, especially the particle discrete element method, has become the mainstream method to study the macroscopic mechanical behavior of rocks from the mesos...

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 孙博杨怀德
Owner POWERCHINA CHENGDU ENG
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