Multiscale measuring method for incompatible deformation of bedding microstructure of interbedded rock

Abstract

The invention provides a multiscale measuring method for incompatible deformation of bedding microstructure of interbedded rock; the method comprises the steps of S1, carrying microscopic-scale bedding dislocation analysis, to be specific, analyzing bedding microstructure deformation by using an electronic mirror via an in-situ tension-compression loading apparatus in connection with an electron microscope, and analyzing rock grain, interlayer and bedding interface microscopic fracture morphological characteristics by using focused ion beam cutting technology; S2, carrying out meso-scale bedding deformation quantitative analysis, to be specific, carrying out bedding stress deformation test by using an electronic mirror via an in-situ tension-compression loading apparatus in connection with an ultra-deep microscope; S3, carrying out macro-scale bedding differential deformation analysis, to be specific, carrying out interbedded rock uniaxial compression and shear test to perform macroscopic deformation analysis; S4, establishing an incompatible deformation model for interbedded rock developing from bedding microscopic dislocation deformation to macroscopic fractures. By using the method, it is possible to measure incompatible deformation characteristics of different bedding structures at multiple scales, systematic research is provided for the physical properties and deformation destruction rules of interbedded rock, and effective analysis on the stability and tightness of underground reservoirs is facilitated.

Description

technical field [0001] The invention relates to the technical field of deformation of layered rock mass, in particular to a multi-scale measuring method for non-coordinated deformation of bedding microstructure of interbedded rock mass. Background technique [0002] Due to the differences in the structure and physical properties of the two types of rock mass above and below the bedding, layered rock mass is often an important factor leading to damage and destruction of underground rock mass engineering. Taking the layered salt rock in the layered rock mass as an example: the structural characteristics and sedimentary structure characteristics of the layered salt rock are the basis for determining its mechanical behavior, and the analysis of the crack initiation law of the rock mass from the microscopic aspect provides the basis for the macroscopic analysis. For a single salt rock layer, domestic and foreign scholars have carried out many research results. Through the researc...

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Problems solved by technology

The difference in lithology leads to different characteristics of bedding failure, the difference in mechanical properties and deformation inconsistency between salt rock and interlayer, and the difference in creep rate between salt rock and interlayer by nearly 2 orders of magnitude, which makes the salt rock body with interlayer The destruction process is quite complicated, which affects the safety of the storage

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