Method for testing blasting instability law of jointed rock slope based on model test

Abstract

The invention discloses a method for testing the blasting instability law of a jointed rock slope based on a model test, and the method comprises the following steps: S1, obtaining a slope profile, determining various profile parameters and sizes of the slope, and determining the geometric similarity ratio, time similarity ratio and strength similarity ratio of a slope physical model; and S2, setting a model box special for the jointed rock blasting test, and determining model building blocks. A model box special for a jointed rock blasting test is arranged by building similar materials; the phenomenon that the side slope is subjected to instability damage due to blasting vibration can be visually and accurately presented; stress analysis is carried out on a test result, so the stress distribution of a research object in each stage of damage development and the stress redistribution situation caused by deformation and local damage are obtained, and the stress characteristics of naturalrock mass in engineering can be visually, qualitatively or quantitatively reflected; the equipment operation, installation and debugging are simple and easy to understand, test results can meet engineering requirements, and engineering construction is protected.

Description

technical field [0001] The invention relates to the technical field of blasting testing of jointed rock slopes, in particular to a method for testing the law of blasting instability of jointed rock slopes based on model tests. Background technique [0002] Physical simulation is based on the principle of similarity, that is, the simulated model and the research object need to meet a certain similarity relationship under certain conditions (geometric conditions, stress conditions, friction coefficients, etc.), so as to establish the relationship between the research object and the simulation test. , to achieve the purpose of making the physical phenomena appearing in the model test process similar to the actual prototype. [0003] The slope physical model test is a test technology for the specific research object of the slope. Its development has mainly gone through four stages: the frame model test, the bottom friction model test, the large shaking table model and the centri...

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Problems solved by technology

[0004] At present, the bottom surface friction test can only simulate one section, simulate the law of slope and landslide under the action of gravity, and the application of other external forces is limited. The test equipment used in the large-scale shaking table model test and centrifuge model test is relatively expensive and the cost is relatively high

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