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

Abstract

Disclosed are a rough surface fissure generation method based on digital image technology, and an experimental system, relating to the technical field of rock mechanics experiments. The method comprises the steps of: A. loading a rock specimen with a through fissure formed therein, and removing debris on the surface of the specimen; B. a scanner scanning a rough fissure surface to obtain a digital image of the rough fissure surface; C. processing the digital image, wherein denoising processing and threshold segmentation processing are involved; D. performing normalization processing on an RGB value of the digital image to obtain a normalized matrix, establishing a space coordinate system, and obtaining a restoration scale of an image digital matrix; E. calculating a digital restoration matrix; and F. completing simulation of a rough surface fissure, and restoring a complete space fissure. The experimental system for the method comprises: a housing (1), a column (2), a telescopic cylinder array (3), a control system (4) and a hydraulic circuit (5). By means of the method and system, the roughness structure of a rock fissure can be accurately described, thereby facilitating the study of the laws of the physical mechanics of rock rough fissure seepage.

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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