Large-scale bi-dimensional fractured rock mass shearing seepage meter

Abstract

The invention belongs to shearing seepage experimental instruments, and relates to a large-scale bi-dimensional fractured rock mass shearing seepage meter which comprises a workbench, a vertical stress loading system, a transversal stress loading system, a vertical seepage loading system, a transversal seepage loading system and a data measure and control system. The large-scale bi-dimensional fractured rock mass shearing seepage meter can be used for not only unidirectional load-unidirectional seepage experiments, and unidirectional load-multi-directional seepage experiments of fractured rock mass, but also bidirectional load-unidirectional seepage experiments and bidirectional load-multi-directional seepage experiments. As a crack on the large-scale fractured rock mass is generated through a computer at random, discontinuous surfaces such as a joint, a crack and the like in natural geological rock mass can be simulated relatively really, and small-size defect can be overcome; moreover, micro cameras are adopted, so as to record the whole flowing process and state of a colored liquid in the fractured rock mass; stress loading and seepage loading are controlled conveniently in an experimental process, the pressurized seepage state can be kept constant for a long time, and the experimental accuracy is high.

Description

technical field [0001] The invention relates to a shear seepage test instrument, in particular to a large-scale two-dimensional fractured rock mass shear seepage instrument. Background technique [0002] Rock mass is a discontinuous medium composed of randomly distributed discontinuous surfaces such as joints and fissures and the rocks cut by them. A large number of fissures exist in natural rock mass, which seriously affect the seepage characteristics of rock mass. The inhomogeneity and anisotropy of the permeability coefficient of the seepage of the fractured rock mass are very obvious, and the distribution of the fracture network and the stress environment have a significant impact on the seepage field of the rock mass. and safe operation is important. [0003] At present, most of the shear seepage experimental devices for fractured rock mass are laboratory experiments using small-scale rock samples with simple fractures (such as single fractures and orthogonal fractures...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the experimental devices for shear seepage of fractured rocks use indoor experiments with small-scale rock samples with simple fractures (such as single fractures and orthogonal fractures), or large-scale rock masses formed by combining multiple rocks. Model experiments, although these experiments can simulate the seepage state of fractured rock mass to a certain extent, they also have obvious shortcomings: 1) Small-sized rock samples are greatly affected by the size effect; 2) Simple fractures or multiple rocks The fissures formed by the combination are quite different from the fissure network of the actual rock mass, and it is difficult to simulate the seepage state of the fissure network of the real rock mass; 3) The control of stress loading and seepage loading is not flexible, and it is difficult to simulate the unidirectional loading of the complex fissure network rock mass Seepage states such as multi-directional seepage, multi-directional loading and unidirectional seepage; 4) The rock mass sample is invisible during the experiment, and the flow process of the fluid in the fracture network cannot be visually tracked

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