Rock slope modeling method based on discrete element and synthetic rock mass technology

Abstract

The invention discloses a rock slope modeling method based on discrete elements and a synthetic rock mass technology, which comprises the following steps of: firstly, acquiring fracture data on site, and solving a fracture distribution function; rock and fractured rock samples are collected on site for an indoor mechanical test, and mechanical parameters of the rock and fractures are obtained; establishing a discrete element slope model by utilizing the slope section; constructing a slope discrete fracture network model DFN by utilizing a fracture distribution function, and combining a discrete element slope model with the fracture network model; and finally, simulating a mechanical test which is the same as that in a laboratory, calibrating mesoscopic parameters of contact between particles by comparing macroscopic mechanical parameters, and applying a calibration result to the combined model to finish modeling of the fractured rock slope model. According to the method, discreteness of fractures and mechanical characteristics of fractured rock mass are fully considered, spatial distribution characteristics of the fractures in reality are truly reflected, the model can be used for slope stability analysis, landslide movement process inversion and other problems, and the result is true and reliable compared with the prior art.

Description

Technical field [0001] The present invention belongs to the field of geotechnical engineering, geological engineering technology, specifically relates to a rock slope modeling method based on discrete elements and synthetic rock mass technology. Background [0002] Affected by tectonic movement and late epigenetic modification, fissures in rock masses develop. The presence of fissures will significantly reduce the strength parameters of rock masses, and the deformation and stability of slope rock masses are mainly controlled by internal fissures. The more fissures, the more broken the rock mass, the more unstable the slope, and it is prone to geological disasters such as landslides. Therefore, when performing numerical simulations, how to realistically simulate random cracks in rock masses and embed them in the slope model plays a very important role in the correct analysis and evaluation of slope stability and the true inversion of landslide processes. [0003] The existing meth...

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Problems solved by technology

[0003] When simulating rocky slopes, the existing methods simplifies the cracks, or ignores the influence of some small cracks, and only embeds a few obvious larger cracks, or simplifies the cracks of the entire slope into several groups. Fracture groups whose inclination angle and direction are fixed cannot reflect the discrete characteristics of fractures

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