Device and method for studying real-time development of rock mesoscopic damage by isotope tracking method

Abstract

The invention discloses a device and a method for researching real-time development of microscopic damage of rocks through an isotope tracing method. The device comprises a fixing device and a permeability test device, wherein the fixing device comprises a steel wire rope, screw connectors and an aluminum ring; a rock sample is positioned in the aluminum ring; two ends of the aluminum ring are respectively connected with the corresponding screw connector; the middle of each screw connector is connected with the steel wire rope; a leveling ball is arranged at the head of the steel wire rope; the permeability test device comprises a first pressure vessel and a second pressure vessel used for containing chemical test solutions of radioactive isotopes; one end of the first rock sample is connected with the first pressure vessel, and the other end of the rock sample is connected with the second pressure vessel; an osmotic pressure difference is formed between the first pressure vessel and the second pressure vessel; and the first pressure vessel and the second pressure vessel are simultaneously connected with a supercharging device. According to the device and the method disclosed by the invention, the internal crack propagation condition of the rocks can be accurately researched, lots of repeated experiments are avoided, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a device and method for studying the real-time development of rock mesoscopic damage by an isotope tracking method, belonging to the field of rocks. Background technique [0002] The destruction of large-scale practical projects related to rock mass is often caused by the initiation, development, and penetration of a large number of micro-cracks in the internal rock mass, resulting in the appearance of macro-cracks. Therefore, it is of great practical value and engineering significance to study the evolution of micro-cracks in rock mass and their relationship with damage development. [0003] From a mesoscopic point of view, the failure process of rock under external loads starts from the internal damage of the mesoscopic structure of the rock, including several processes of crack initiation, formation, development, penetration, and macroscopic crack formation. Since the 1920s, many scholars at home and abroad have made a lot ...

AI Technical Summary

Problems solved by technology

Scanning electron microscope technology is a very visual and intuitive tool for studying crack initiation and propagation, but its disadvantage is that it can only observe the cracks on the surface of the test piece; X-ray CT technology is used to non-destructively detect the internal structure of rocks and crack evolution process, but it is not visually intuitive enough. , domestic research mainly focuses on the analysis and theoretical research of CT numbers. Although the crack evolution reconstruction of the rock failure process can be established, the reconstruction model is different from the actual situation after all.

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