Visual controllable rough single fracture seepage simulation device and use method thereof

Abstract

The invention relates to a visual controllable rough single-fracture seepage simulation device and a use method thereof.The visual controllable rough single-fracture seepage simulation device comprises a mixing and stirring unit, a single-fracture simulation unit and a waste liquid recovery unit, the single-fracture simulation unit comprises an expansion conversion interface and a simulation box, and at least four single-fracture movable boards with adjustable inclination angles are arranged in the simulation box; the simulation box comprises a front transparent plate and a rear transparent plate, at least three longitudinal guide rails allowing corresponding single-fracture movable plate surfaces in the simulation box to slide up and down are correspondingly arranged on the inner side surfaces of the front transparent plate and the rear transparent plate, and sliding handles are mounted at the joints of the longitudinal guide rails and the single-fracture movable plate surfaces; the at least four single-fracture movable boards are arranged in the simulation box in an upper-lower two-group mode, a space defined by the upper-lower two-group single-fracture movable boards, the front transparent board and the rear transparent board is a sealed cavity, and an inlet and an outlet of the sealed cavity are an inlet and an outlet of the simulation box. And the influence of the seepage condition between rock fractures and the opening roughness on fracture seepage in different types and different environments can be simulated.

Description

technical field [0001] The invention relates to the technical field of rock seepage, in particular to a simulation device and an experimental method for visualized and controllable rough single-crack seepage. Background technique [0002] For the microscopic study of fractures, the simulation experiments of single fractures to study the characteristics of water flow in bedrock fractures are relevant to many engineering practices, such as underground engineering geotechnical applications, hydropower engineering, petroleum reservoir development, mining and geothermal energy extraction and liquid waste treatment , a single fracture is the basic unit of bedrock fractures, which includes complex fractures, three-dimensional fractures and fracture networks. The fracture surface roughness obeys the self-affine distribution, and a single fracture is usually simplified as a pair of smooth parallel plates. The cubic law is usually used to characterize the water flow in the fractured m...

AI Technical Summary

Problems solved by technology

The fracture surface roughness obeys the self-affine distribution, and a single fracture is usually simplified as a pair of smooth parallel plates. The cubic law is usually used to characterize the water flow in the fractured medium. Since the influence of surface roughness is ignored, the smooth parallel plate model Seems oversimplified, cubic law based on smooth parallel plates has some disadvantages like overestimation of velocity and flow

In a single fracture, when the water flow passes through the rough unit, the phenomenon of backflow, streamline separation and reattachment of the original streamline path will occur, resulting in increased water flow resistance

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