Fractured rock mass grouting simulation visual test system and test method considering stress effect

Abstract

The invention discloses a fractured rock mass grouting simulation visual test system and test method considering a stress effect. The system comprises a pressure supply device, a constant-pressure slurry discharge device, a fractured rock mass stress simulation device, a fractured rock mass test device, a tail water collection device and a data monitoring device, the fractured rock mass stress simulation device comprises a reaction frame and jacks, and the jacks in different directions can be used for applying pressure to a fractured rock mass sample in the fractured rock mass test device, sothat the dead weight and the tectonic stress are simulated. According to the invention, the flowing state of the slurry in the fractured rock mass under the combined action of dead weight and tectonicstress can be simulated; the migration and diffusion process of the slurry and the changes of the flow velocity and pressure of the slurry at different positions are observed; the defect that in theprior art, the initial crustal stress effect and the slurry movement process visualization cannot be considered is overcome, and meanwhile the slurry flowing process in the fractured rock mass under the influence of various parameters such as different grouting pressures and slurry characteristic fracture inclination angles can be simulated.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a grouting simulation test device in geotechnical engineering, in particular to a fissure rock mass grouting simulation visualization test system and a test method considering the effect of stress. Background technique [0002] During the excavation and unloading process of underground rock mass, a large number of joints and fissures are generated inside the engineering rock mass, which is prone to instability and damage in severe cases, affecting the stability of surrounding rock and engineering safety. Grouting is one of the important means to repair fractured rock mass and improve the strength of surrounding rock. The diffusion path and range of grout in fractured rock are important references for judging the effect of grouting. At present, scholars at home and abroad have done a lot of theoretical derivation on the law of slurry flow and diffusion in a single fracture. ...

AI Technical Summary

Problems solved by technology

[0010] Although these devices can simulate the diffusion process of rock mass or soil grout to a certain extent, they cannot simulate the visual observation process of grouting in fractured rock mass under the action of self-weight and tectonic stress, and measure the pressure and flow velocity changes at various positions in the cracks.

Images