Manufacture device and method of hydrological coupling test three-dimensional fracture rock sample

Abstract

The invention relates to a manufacture device and method of a hydrological coupling test three-dimensional fracture rock sample; the manufacture method comprises a three-dimensional fracture precision positioning sample mold and a high-pressure injection fracture preforming device; the three-dimensional fracture precision positioning sample mold comprises side plate I, side plate II, a bottom plate and positioning porous plates and can provide precision positioning for multiple three-dimensional fractures and forming of a sample. The high-pressure injection fracture preforming device comprises polyester film boxes, cotton threads, rubber water pipes, mandrels and manual screws, and can preform high-pressure injection three-dimensional fractures and form an injection passage. By combining annularly distributed holes and transversely distributed holes, the positioning porous plates are used to allow precision positioning for the angle, spacing and spatial positions of the multiple three-dimensional fractures; the small-diameter rubber water pipes and mandrels to preform hydraulic passages in the sample and communicate the open fractures, high-pressure injection of water is achieved for the open fractures. The manufacture device and method are simple in structure, convenient to operate and good positioning precision and are widely applicable to the hydraulic coupling test for three-dimensional fracture rock materials.

Description

technical field [0001] The invention relates to a sample making device and method for making rock-like materials, in particular to a three-dimensional fissure-like rock sample making device and method. Background technique [0002] In recent years, as the center of gravity of my country's water conservancy, hydropower, and transportation projects has shifted to the western region with complex terrain and geology, a large number of deep and long tunnels (tunnels) and underground chambers have been built in alpine and canyon areas, showing large buried depth, high ground stress, and strong The remarkable characteristics of osmotic pressure bring great challenges to engineering construction. Under the coupling effect of high ground stress and strong osmotic pressure, engineering fractured rock mass is prone to rupture and evolution, resulting in weakening of rock mass strength and instability of engineering structure, which in turn induces serious engineering accidents. Water c...

AI Technical Summary

Problems solved by technology

[0010] (1) The existing methods for making rock fissure specimens are suitable for the study of the fracture mechanism of fissure rock mass under pure stress environment, and there is no specimen production device and method involving the failure mechanism of hydraulically coupled rock fissures

[0011] (2) Existing methods for making hydraulic fracturing specimens are suitable for the study of the fracture mechanism of two-dimensional fractured rock mass under hydraulic pressure, and there is no test piece production device and method involving the failure mechanism of three-dimensional fractured rock mass under hydraulic pressure

[0012] (3) The existing rock fissure test specimens are made separately considering the two test factors of hydraulic coupling and three-dimensional fissures, and there is no test piece production device and method involving the fracture mechanism of three-dimensional fissure rock mass under hydraulic coupling

At present, there are few indoor experiments on the fracture mechanism of fractured rock mass under the action of hydraulic coupling, and no one has done a device for making three-dimensional fracture water injection fracture test samples of rock mass. It is of great significance to make the test piece making device and making method of crack water injection fracture test

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