Method and system for evaluating and analyzing mechanical properties of conglomerate

Abstract

The invention provides a method and system for evaluating and analyzing mechanical properties of a conglomerate. The method comprises the steps that X-ray CT scanning is performed on an obtained conglomerate sample to obtain a three-dimensional digital core data volume, and the spatial structure of the three-dimensional digital core data volume is reconstructed to obtain conglomerate particle andmatrix space information; according to the conglomerate particle and matrix space information, the conglomerate sample is separated to obtain conglomerate particles and a matrix; a Brinell hardness test is performed on the mechanical properties of the conglomerate particles and matrix to obtain macroscopic mechanical parameters of the conglomerate particles and matrix; according to the macroscopicmechanical parameters of the conglomerate particles and matrix, a discrete element numerical method is used for analyzing microscopic mechanical parameters of the conglomerate particles and matrix; according to the microscopic mechanical parameters of the conglomerate particles and matrix, a discrete element numerical simulation model used for analyzing the microscopic mechanical properties of the conglomerate particles and matrix is established. According to the scheme, the real conglomerate distribution of the core or formation can be well modeled, and the results meet the actual requirements.

Description

technical field [0001] The invention relates to the technical field of rock and soil mechanics, in particular to a conglomerate mechanical property evaluation and analysis method and system. Background technique [0002] Conglomerate is a widely occurring rock material. In engineering, conglomerate appears in dam construction, underground roadway construction, oil and gas reservoir development and other working conditions. In conglomerate, the particle size of gravel particles is above 2 mm. The matrix between gravel particles is cuttings, clay minerals, etc., which present a spatial structure in which gravel particles are embedded in the matrix. On the one hand, this spatial structure causes the conglomerate itself to have strong heterogeneity and discontinuity, thus causing the conventional experimental method to evaluate the rock mechanical properties of conglomerate, which is limited to the size of the experimental specimen and the representativeness of sample selectio...

AI Technical Summary

Problems solved by technology

On the one hand, this spatial structure causes the conglomerate itself to have strong heterogeneity and discontinuity, thus causing the conventional experimental method to evaluate the rock mechanical properties of conglomerate, which is limited to the size of the experimental specimen and the representativeness of sample selection. problem, it is impossible to give reasonable real mechanical properties of conglomerate, let alone meet the requirements for data accuracy in engineering

On the other hand, due to the diversity of gravel particles, and the distribution cannot be described intuitively, it is difficult to accurately establish a mechanical model to describe the mechanical properties of conglomerate.

Therefore, the general numerical simulation method cannot accurately model the real conglomerate distribution of the core or formation, and the results also cannot meet the actual requirements

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