Rigid-flexible true triaxial grouting seepage coupling test device and method for CT scanning

Abstract

The invention provides a rigid-flexible true triaxial grouting seepage coupling test device and method for CT scanning. The rigid-flexible true triaxial grouting seepage coupling test device and method are suitable for geotechnical engineering simulation experiment research. The device comprises a first principal stress loading system, a second principal stress loading system, a third principal stress flexible loading system, a rigid base plate combination system, a base part, a grouting system, a grout outlet system and a data collection system. The scanning cross section area of the test device is made of a carbon fiber material, so that artifacts of scanned images are prevented; medical CT can be placed for real-time scanning; loading is performed in a composite form of two-way rigid loading and one-way flexible loading, so that the problem of corner stress concentration caused by three-way stress loading is eliminated; and according to the invention, a sample fracturing true triaxial grouting seepage test can be carried out, the fracture fractal dimension, permeability coefficient and slurry diffusion and filling condition change rules of a certain stage in the grouting seepagetest can be obtained in a CT scanning image, and the slurry-rock coupling mechanism in the slurry seepage process can be researched.

Description

technical field [0001] The invention relates to a true triaxial grouting seepage coupling test device and method, in particular to a CT scanning rigid-flexible true triaxial grouting seepage coupling test device and method suitable for physical simulation experiment research in geotechnical engineering. Background technique [0002] Due to the disturbance of underground mining engineering, the stress state of the original rock in the coal seam is often broken, which is reflected in various forms of stress loading and unloading. The study of influence laws can more truly reflect the actual situation of coal and rock masses. For the above studies, many research equipments are limited to conventional triaxial experimental machines to simulate the mining disturbance of coal and rock mass, which cannot truly reflect the variation law of the three-dimensional principal stress of coal and rock mass. [0003] However, when the true triaxial test machine is used to simulate the dist...

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Problems solved by technology

[0004] The cracks generated under the true triaxial stress path have a certain de

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