Rock shearing-seepage testing machine and testing method thereof

Abstract

The invention provides a rock shearing-seepage testing machine and a testing method thereof. The testing machine comprises a sealing test box, and the sealing test box comprises a hollow frame; a rocksample is arranged in the hollow frame; a Z-axis loading plate is arranged at the upper end of the rock sample; two sides in the X-axis direction are respectively provided with an upper X-axis loading plate and a lower X-axis loading plate; two sides in the Y-axis direction are respectively provided with an upper Y-axis loading plate and a lower Y-axis loading plate; a first sealing assembly is arranged between the upper X-axis loading plate and the lower X-axis loading plate and comprises an arc-shaped elastic metal sleeve, a first polyurethane water sealing bag is arranged in the elastic metal sleeve, and a second polyurethane water sealing bag connected with the end of the first polyurethane water sealing bag is arranged between the upper Y-axis loading plate and the lower Y-axis loading plate. According to the invention, the real-time testing of rock shear failure and seepage in a triaxial stress state of simulated rock is realized, and a seamless sealing ring is formed around a crack of a rock sample to realize effective sealing.

Description

technical field [0001] The invention relates to the field of rock mechanics, in particular to a rock shear-seepage testing machine and a testing method thereof. Background technique [0002] Water has a greater impact on the stability of rock engineering. At present, there are many rock shear-seepage test devices and methods. For example, CN102944665B discloses a shear box suitable for rock joint shear-seepage coupling test and test Method, involves single normal force and direct shear force, can't simulate the stressed situation process of real formation; As CN207215662U discloses a kind of rock fissure shear seepage test sealing device of servo control, also is to only relate to single normal force As well as direct shear force, the sealing pressure can be corrected with the crack deformation, but with the shear displacement and deformation of the rock sample, the joint between the ends of the cracks on both sides of the rock sample and the end of the water cavity is prone...

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Problems solved by technology

[0002] Water has a greater impact on the stability of rock engineering. At present, there are many rock shear-seepage test devices and methods. For example, CN102944665B discloses a shear box suitable for rock joint shear-seepage coupling test and test Method, involves single normal force and direct shear force, can't simulate the stressed situation process of real formation; As CN207215662U discloses a kind of rock fissure shear seepage test sealing device of servo control, also is to only relate to single normal force As well as direct shear force, the sealing pressure can be corrected with the deformation of the crack, but with the shear displacement and deformation of the rock sample, the joint between the ends of the cracks on both sides of the rock sample and the end of the water cavity is prone to poor sealing. severe water leakage

[0003] CN108519293A discloses a true triaxial rock shear seepage experimental device, in the X, Y, Z triaxial stress state, the rock shear failure and seepage are tested in real time, but the cracks on both sides of the rock sample are not sealed, Water may flow from both sides of the fracture in the rock sample rather than along the shear plane of the fracture

The existing rock shear-seepage test device mainly has the following problems: the sealing measures of the sealing test box are limited, and the rock may undergo deformation such as shear shrinkage and shear expansion during the shear seepage process, which cannot achieve a good water sealing effect; Large shear displacement, it is difficult to realize the shear penetration test of rock samples under complex loads

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