Adjustable fluid-solid coupled similar material for model test and preparation method of adjustable fluid-solid coupled similar material

Abstract

The invention relates to an adjustable fluid-solid coupled similar material for a model test and a preparation method of the adjustable fluid-solid coupled similar material. The adjustable fluid-solid coupled similar material is prepared from the following raw materials in parts by weight: 1 part of standard sand, 0.05-0.16 part of calcium carbonate, 0.05-0.18 part of barite powder, 0.02-0.08 part of cement, 0.1-0.14 part of water, 0-0.04 part of silicone oil and 0.07-0.15 part of chlorinated paraffin. The preparation method comprises the steps of mixing the four fine-grain materials including standard sand, calcium carbonate, barite powder and cement, and uniformly stirring the four materials; adding water and uniformly stirring; heating chlorinated paraffin to 45-60 DEG C, and adding the heated chlorinated paraffin into the mixed material; adding a regulator, namely the silicone oil, and uniformly stirring. The index of physical property and the index of mechanical property can be adjusted through adjusting the proportion of the materials on the premise that the whole performance of the materials is not affected, so that the possibility for simulating different kinds of rock masses with different osmotic coefficients is provided; the strength and osmosis of the similar material can be adjusted within a relatively wide range, and various kinds of rock masses with medium and low strengths can be simulated.

Description

technical field [0001] The invention relates to an adjustable fluid-solid coupling similar material for a model test and a preparation method thereof, belonging to the technical field of material science. Background technique [0002] At present, most scholars use geomechanical model tests to study the problems encountered in underground engineering construction and to explore the mechanical laws of the construction process. However, there are obvious deficiencies in the current underground engineering model tests. Most of the similar materials in the prior art only consider physical and mechanical similarities. Most of the similar materials will disintegrate in water and cannot be applied to fluid-solid coupling model tests. For the similarity model test of fluid-solid coupling, there are two main problems: ① The research on the similarity theory of fluid-solid coupling is not mature enough; The fluid-solid coupling similar materials focus on solving the problem of materia...

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in the current underground engineering model tests. Most of the similar materials in the prior art only consider physical and mechanical similarities. Most similar materials will disintegrate in water and cannot be applied to fluid-solid coupling model tests.

For the similarity model test of fluid-solid coupling, there are two main problems: ① The research on the similarity theory of fluid-solid coupling is not mature enough; The fluid-solid coupling similar materials focus on solving the problem of material disintegration in water, ignoring the effective control of the solid mechanical properties and water rationality of the material, the similarity simulation is poor, and cannot reflect the actual situation under the coupling of rock mass and water. It is not a real fluid-solid coupling analog simulation. Therefore, it is necessary to do further research on fluid-solid coupling similar materials

The adjustable range of compressive strength and permeability coefficient of this patent is small, and the scope of application is small

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