Rough crack changing opening degree for visualization experiment and manufacture method thereof

Abstract

The invention discloses a rough crack changing opening degree for a visualization experiment and a manufacture method thereof. The transparent rough crack comprises transparent rough crack upper and lower trays, a crack space between the rough crack upper and lower trays, upper and lower edge baffles at two sides, a rigid gasket with specific thickness, a reserved water stop cavity, and so on. Themanufacture method comprises following steps of: acquiring an original rough crack by cleaving a square rock, and copying to obtain the transparent rough crack upper and lower trays; customizing upper and lower edge water stop baffles with specific size and structure; fixing the upper and lower edge baffles at two sides at two sides of the crack upper and lower trays from bottom to top; and adding a rigid gasket with specific thickness between the upper and lower edge baffles according to needs, so as to change average crack opening degree. The method is easy to operate, has good repeatability and high accuracy, and delivers reliable, accurate average opening degree of the rock rough crack.

Description

technical field [0001] The invention belongs to the field of rock mass seepage and cross-scale multiphase flow displacement-dispersion-capture technology, and is especially suitable for the experimental research of cross-scale rock fissures considering the average opening of joint fissures and the influence of roughness. Rough cracks with varying degrees of opening for visualization experiments and their fabrication methods. Background technique [0002] The research on the characteristics of multiphase flow movement process in rock fractures (pores) is of great significance to the fields of shale oil (gas) exploitation, CO2 geological storage, and groundwater pollutant migration. The geometric structure of cracks in rough rock is related to the average crack opening. Therefore, the parameter of average crack opening has an important impact on oil extraction efficiency, CO2 geological storage capacity, and groundwater pollutant treatment. The roughness of the edge caused by...

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Problems solved by technology

The geometric structure of cracks in rough rock is related to the average crack opening. Therefore, the parameter of average crack opening has an important impact on oil extraction efficiency, CO2 geological storage capacity, and groundwater pollutant treatment. The roughness of the edge caused by the edge effect, the sealing of the cracked rock, etc., the current research rarely involves the visualization experiment of rock cracks, and there is almost no research on changing the roughness of transparent cracks. How to use a simple and easy method to directly change the average opening of cracks from the outside , and it is a difficult problem to ensure that the edge of the fracture mold has a stable and closed boundary condition. In the prior art, a high-temperature fracture seepage simulation device (application number 201711423221.X) that can change the fracture opening is disclosed. The composition method mainly It is the crack between the rock block and the rock block, and the ceramic support balls are evenly distributed on the edge of the crack. The disadvantage is that the crack will inevitably be damaged when the rock is split, so the opening space distribution between the upper and lower plates of the rough crack is not uniform. However, by adding particles in the fracture space, it is not possible to completely increase the distance between the upper and lower walls of the fracture by the same distance, which is not applicable in the actual experimental design process

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