Triaxial seepage device for changing humidity of gas and positive pressure of outlet end

Abstract

The invention discloses a triaxial seepage device for changing the humidity of gas and positive pressure of an outlet end. The triaxial seepage device comprises a triaxial pressure system, wherein a gas supply system is connected with the air inlet end of the triaxial pressure system through a pipeline; the air outlet end of the triaxial pressure system is connected with a positive pressure adjusting system through a pipeline; the positive pressure adjusting system is connected with a flow determining system through a pipeline; a pressure loading system is connected with the triaxial pressuresystem; a vacuum degassing system is connected to a part between the positive pressure adjusting system and the flow determining system through a pipeline. The technical problems that the triaxial seepage device cannot change the humidity of the gas, cannot simulate the influence of the change of gas humidity of a coal mining site on coal permeability and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of experimental instruments, and in particular relates to a triaxial percolation device for changing gas humidity and outlet positive pressure. Background technique [0002] my country is rich in coal resources. During coal mining operations, roadway excavation will inevitably destroy the microclimate of the underground coal seam and change the original air humidity in the mine. The mine contains abundant coalbed methane resources, the main component of which is gas. In the coal seam gas migration process, the permeability is one of the important parameters reflecting the difficulty of gas seepage in the coal seam, and at the same time, the permeability is also a key research direction of gas seepage mechanics and engineering. Therefore, the research on the calculation method of coal seam gas permeability is very important to the development of gas seepage mechanics. At the same time, a series of mine safet...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a three-axis seepage device that changes the gas humidity and the positive pressure at the outlet to solve the problem that the existing three-axis seepage device cannot change the gas humidity and cannot simulate the impact of changes in the gas humidity on the coal mining site. Technical issues such as the impact of permeability

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