Seepage testing apparatus and method for rock with single fracture

Abstract

The invention provides a seepage testing apparatus and method for rock with a single fracture, belonging to the technical field of laboratory rock seepage measurement equipment. According to the invention, the real three-dimensional morphology of the surface of a rock fracture is obtained through scanning, and authenticity of the single fracture included in a test piece is realized through 3D printing technology, so data obtained through experiments is more accurate, scientific and real; a detachable test piece loading seal chamber is designed in the invention and the contact surfaces of the test piece and the seal chamber are bonded via an epoxy resin adhesive, so sealing surrounding the test piece is guaranteed, water is only allowed to penetrate through the fracture of the test piece, and accuracy and authenticity of fracture seepage testing are guaranteed; adjustability of the fracture of the test piece in testing is realized by dismounting and replacing a sealing device loaded with test pieces with different fracture openness; and since the designed sealing device has the characteristic of compression resistance, the range of applicable hydraulic pressure of the apparatus can be greatly improved, so the change trend of penetration characteristics of fracture seepage under different hydraulic pressures can be accurately obtained.

Description

technical field [0001] The invention belongs to the technical field of measuring equipment for a rock seepage laboratory, and in particular relates to a single crack rock seepage test device and method. Background technique [0002] For rock mass with fractures, when there is water in the cracks, the pressure of the water will lead to the gradual instability and failure of the rock mass; on the macro scale, the existence and change of the seepage field will lead to the instability of the fractured rock mass engineering, and even lead to large One of the important reasons for large-scale geological disasters; therefore, to study the impact of fractures on rock mass engineering requires understanding the permeability characteristics of fractured rocks; [0003] At present, most studies on the permeability characteristics of single fracture rocks are based on the cubic theorem, and the applicable condition of the cubic theorem is that the upper and lower surfaces of the fractur...

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Problems solved by technology

[0003] At present, most studies on the permeability characteristics of single fracture rocks are based on the cubic theorem, and the applicable condition of the cubic theorem is that the upper and lower surfaces of the fracture are basically parallel and the roughness is small; The cracks are studied; and most of the research tests use the fixture to clamp the specimen, and change the opening width of the crack by changing the thickness of the gasket in the crack. This process will inevitably lead to water penetration between the gasket and the crack; and The pressure cannot be adjusted, or the pressure adjustment range is small by using the water level difference, which cannot truly simulate the natural fracture rock mass seepage process;

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