A crack generation method and test system for rough surfaces based on digital image technology

Abstract

The present invention provides a rough surface crack generation method and test system based on digital image technology, which relates to the technical field of rock mechanics testing. The steps include: A. Loading a rock specimen, forming a through crack in the specimen, and removing debris on the surface of the specimen. ; B. Scan the rough crack surface with a scanner to obtain a digital image of the rough crack surface; C. Process the digital image, including noise removal and threshold segmentation; D. Normalize the RGB values ​​of the digital image , obtain the normalized matrix, establish a spatial coordinate system, and obtain the image digital matrix restoration ratio; E. Calculate the digital restoration matrix; F. Complete the simulation of rough surface cracks and restore complete spatial cracks; the test system includes shells and columns , telescopic cylinder array, control system and hydraulic circuit. The invention provides a method for studying the physical and mechanical laws of seepage in rough rock cracks, and accurately describes the roughness structure of rock cracks.

Description

technical field [0001] The invention relates to the technical field of rock mechanics tests, in particular to a method for generating cracks on rough surfaces based on digital image technology and a test system for simulating cracks on rough surfaces. Background technique [0002] The natural fracture structure and seepage behavior of rock mass are extremely complex, and the seepage mechanism and quantitative description of rock mass fractures have always been a difficult problem of great concern in geotechnical, mining, geology, petroleum and natural gas engineering, and the joints and cracks in rock mass are the source of groundwater As the main channel of seepage, the surface roughness of rock mass fissures has a great influence on groundwater seepage. The cracks in natural rock mass have been affected by complex geological processes for a long time, and the roughness of the surface varies widely. It is difficult to intuitively characterize the roughness of the rock mass ...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing natural rock rough fracture surface simulations use resin materials to replicate rock surface features, and use similar materials to reconstruct the fracture surface. This method cannot avoid the interference of uncertain factors in the test on fracture reconstruction, and the flow In the solid coupling test, different tests cannot be carried out on two specimens with the same fracture condition, and the hydraulic opening of the joint surface cannot be accurately obtained. There is a lack of necessary research methods for studying the fluid-solid coupling of fractured rock mass from the mesoscopic scale. and test methods; for this reason, further improvements to existing test methods and test systems are required

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