Method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation

A technology of wave equation and medium permeability, applied in the field of calculation of the permeability coefficient tensor of anisotropic fractured rock mass, can solve the problems of high cost, achieve the effects of less restrictive conditions, simple calculation method, and good promotion and application value

Inactive Publication Date: 2012-11-28
HOHAI UNIV
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Problems solved by technology

[0003] The methods for determining the anisotropic permeability parameters of rock mass can be summarized into four categories: the first category is the fracture sample method proposed by Snow (1969), which is based on the cubic law of groundwater movement in a single fracture and considers the rock mass Geometric elements such as the inclination, inclination, gap width, and gap spacing of the structural plane of the middle fracture, and the method for calculating the permeability coefficient tensor of the rock mass; the second category is Papadapulos (1966), Hantush (1966), Way (1982), Neuman (1975 , 1984), Zhou Zhifang (1998) and other pumping test methods successively proposed, based on the principle of analytical solution, the permeability coefficient tensor of rock mass is determined through field pumping

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  • Method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation
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  • Method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation

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[0039] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0040] Such as figure 1 As shown, the method of determining the permeability parameters of anisotropic media based on the wave equation of single-pore water flow obtains relevant data through the oscillation test system for determining the penetration coefficient tensor of fractured rock mass, and determines the permeability coefficient tensor through the principles of fractured medium hydrodynamics and oscillation tests. Quantity K.

[0041] (1) Draw dimensionless water level change W′ and dimen...

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Abstract

The invention discloses a method for determination of anisotropic medium permeability parameters based on single-hole flow wave equation, comprising the steps of: first, determining the permeability parameter Keij of a single fracture through the single well flow wave equation; second, according to the fractured medium hydrodynamics theory, calculating the equivalent permeability coefficient Kei of same group discontinuities; at last, obtaining the anisotropic medium permeability parameter K based on the rock mass permeability tensor theory. By employing fractured medium hydrodynamics and oscillation test principles in the method, tests and data processing can be quickly finished on spot and the anisotropic medium permeability tensor can be obtained. The method can be used for parameter determination in study of pollutant migration, nuclear waste and carbon dioxide storage and underground heat motion, and also can be used in the field of, such as foundation safety inspection and large volume concrete safety inspection, having a great application and popularization value.

Description

technical field [0001] The invention relates to a method for determining anisotropic medium permeability parameters based on a single-hole water flow wave equation, in particular to a calculation method for anisotropic fractured rock mass permeability coefficient tensor in the field of hydrogeology. Background technique [0002] The anisotropic permeability parameters of rock mass (rock mass permeability coefficient tensor, structural surface equivalent permeability coefficient, structural surface permeability coefficient, etc.) are very important parameters for studying rock mass groundwater movement. It involves engineering fields such as water conservancy and hydropower, mining, nuclear energy, petroleum, coal and transportation, and is related to the safety and stability of foundations, slopes and caverns of major projects. As we all know, the water permeability of rock mass mainly depends on the water permeability of the structural plane of rock mass. How to determine t...

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Application Information

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IPC IPC(8): G01N33/24
Inventor 周志芳赵燕容崔子腾窦智
Owner HOHAI UNIV
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