Fault analog simulation material used for fluid-solid coupling model test and preparation method thereof

Abstract

The invention discloses a fault analog simulation material used for a fluid-solid coupling model test, which comprises components in parts by weight as follows: 1 part of quartz sand, 0.05-0.25 part of talcum powder, 0.05-0.15 part of gypsum powder, 0.08-0.2 part of Vaseline and 0.1-0.2 part of water. The material adopts gypsum as a cementing agent, so as to achieve simulation for fault fluid-solid coupling characteristics; the talcum powder and the quartz sand are adopted as conditioning agents to regulate the weight of the material; and the Vaseline is adopted as a water resistant agent to regulate permeability of the material, simultaneously adopted as a plastic cementing agent of the material, and used for simulating the fault fluid-solid coupling characteristics under different permeability conditions, and real-time comparison with surrounding rock fluid-solid coupling characteristics in the same experiment is achieved. The fault analog simulation material in the fluid-solid coupling model test disclosed by the invention can regulate the strength and the permeability of the material within a larger range, and simulate various types of faults at various levels of intensity.

Description

technical field [0001] The invention relates to a fault similar simulation material used for fluid-solid coupling model tests and a preparation method thereof, belonging to the technical field of material science. Background technique [0002] At present, many scholars use a large number of geomechanical model tests to study the optimization of underground engineering design and construction methods, and explore the mechanical laws of the construction process. However, there are many obvious deficiencies in the current underground engineering model tests, especially in the research and development of similar materials. In the past, most of them focused on the similarity of simulated physical characteristics, and rarely considered the characteristics of materials in water. Although very few consider the fluid-solid coupling effect, in the model test, only a similar material of surrounding rock is often used, which is relatively uniform, and it is difficult to reflect the seep...

AI Technical Summary

Problems solved by technology

However, there are many obvious deficiencies in the current underground engineering model tests, especially in the research and development of similar materials. In the past, most of them focused on the similarity of simulated physical characteristics, and rarely considered the characteristics of materials in water.

Although very few consider the fluid-solid coupling effect, in the model test, only a similar material of surrounding rock is often used, which is relatively uniform, and it is difficult to reflect the seepage change under complex geological conditions, such as the surrounding rock and fault in the case of faults. seepage flow and some other stress-displacement differences

The research and development of similar materials for surrounding rocks is relatively common, but the proportion of similar materials for faults is very rare

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