Post-peak fractured rock triaxial slurry permeability test system and method

Abstract

The invention discloses a post-peak fractured rock triaxial slurry permeability test system and method. The system comprises a permeation system, an axial loading system, a circumferential loading system, a grouting pressure system and a data acquisition and analysis system. The method comprises the following steps: 1, debugging the test system and checking the running condition of the test system; 2, mounting a rock sample; 3, starting and setting the axial loading system; 4, starting and setting the circumferential loading system; 5, fracturing the rock sample to a post-peak fractured state;6, carrying out a grouting permeability test on the rock sample in the post-peak fractured state; 7, ending the test; 8, processing the test data. The permeability change characteristics of the slurry in the rock post-peak fracture process can be effectively determined; and the problems of unsmooth permeation of slurry in the fractured rock sample, easy blockage of the pipeline, non-uniform pressure action of the slurry, difficulty in confining pressure control, difficulty in sealing implementation and the like in triaxial slurry permeability test of different post-peak fractured state rockscan be greatly solved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a triaxial slurry permeability testing system and method for post-peak fractured rocks. Background technique [0002] Many geotechnical engineering, especially in deep underground geotechnical engineering (such as roadway excavation in deep mining engineering, road tunnel excavation, etc.), the rock mass ruptures very seriously under the excavation deflection of high ground stress, and appropriate measures must be taken. Reinforcement technology keeps the rock mass stable, thereby ensuring the safe and efficient exploitation of resources. A large number of engineering practices have shown that grouting reinforcement technology is an effective method to control (ensure stability) cracked rock and soil mass. However, because the grouting reinforcement effect is related to the penetration and diffusion range of the grouting slurry in the fractured rock ...

AI Technical Summary

Problems solved by technology

Because there are obvious differences in the flow characteristics and permeability of the two fluids, and in the existing rock permeability test system of grouting grout (cement grout), it often occurs that the grout is not easy to flow, easy to block, uneven pressure on the grout, and poor penetration. Chang and rock samples are not easy to fix, so the existing rock permeability testing system cannot be used to measure the permeability of grouting cement slurry in cracked rock after peak

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