A similar condition for simulating a carbonate rock geomechanical model and a method for determining the ratio of similar materials

Abstract

The invention discloses a similarity condition for simulating carbonatite geomechanics model and a method for determining the proportion of similar materials. The invention considers geometric similarity and physical similarity to determine the similarity condition of the geomechanics model, and then divides them according to the degree of weathering of the prototype rock mass. There are three types of strongly weathered marl, moderately weathered marl and weakly weathered marl, and the mechanical parameters of the target simulation materials are calculated according to the mechanical parameters of each type of prototype rock and similar conditions; Prepare the specimen model, then carry out uniaxial compression test and direct shear test on the specimen model, analyze the weathering state of marl corresponding to each proportioning range according to the test data, and complete the determination of the proportioning scheme. The invention can simulate the original rocks in different weathering states to the greatest extent through the ratio design, and the simulated mechanical parameters have a high degree of simulation, and provide a feasible solution for the research on rocks in different physical states.

Description

technical field [0001] The invention belongs to the field of similar simulation materials in engineering construction, relates to a geomechanical model technology for simulating carbonate rocks in different weathering states, and in particular relates to a method for determining similar conditions and similar material ratios for simulating carbonate rock geomechanical models. Background technique [0002] At present, sedimentary rocks are widely distributed in most areas of my country. Among them, the shallow marl has different mechanical properties due to different geological environments, especially in the degree of weathering, thickness, bearing capacity There are large differences in such aspects, which have a very unfavorable impact on engineering construction. The different degrees of weathering of the rock mass of each layer make it difficult to qualitatively and quantitatively analyze the bearing capacity of the foundation. This problem has also become the main researc...

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Problems solved by technology

Problems existing in existing materials: In the configuration of materials, some materials themselves have certain toxicity, which is harmful to the health of experimenters; in the production of model materials, the process is complicated and the requirements for materials are strict, which greatly increases the production cost; the ratio of materials Too many types greatly reduce the stability of simulated materials; there is still a lack of relevant research on the simulation of different physical states of the same rock

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