Experimental method applicable to test of adsorption-desorption deformation of coal body under high temperature and high pressure

Abstract

The invention relates to an experimental method applicable to a test of the adsorption-desorption deformation of a coal body under high temperature and high pressure. The experimental method is carried out by using a test system applicable to the adsorption-desorption deformation of a coal body under high temperature and high pressure, and the test system applicable to the adsorption-desorption deformation of a coal body under high temperature and high pressure comprises a vacuumizing system, a gas injection system, an adsorption-desorption deformation test system, and a gas metering system; the vacuumizing system comprises a vacuum pump and a vacuum container, the air inlet of the vacuum pump is connected to the air outlet of the vacuum container through a first air pipe, a first stop valve is arranged on the first air pipe, and the air inlet of the vacuum container is connected to a second air pipe. To sum up, the experimental method has the advantages of convenience in operation, low workload, quick and accurate measurement and high experimental performance, and provides experiment and theoretical research for adsorption-desorption volumetric deformation in the process of coal bed methane extraction.

Description

technical field [0001] The invention relates to an experimental method applicable to the deformation test of coal body adsorption and desorption under high temperature and high pressure. Background technique [0002] The interaction mechanism between coal and gas is a basic scientific issue in the field of gas disaster prevention and control. The study of the interaction mechanism between coal and gas not only guides the research on the mechanism of coal-rock gas dynamic disasters in mines, but also provides an important theory for the extraction of coalbed methane. support. [0003] At present, coalbed methane mining mainly uses various drilling holes (surface drilling, local coal seam drilling, roof and floor drilling, adjacent layer drilling, goaf drilling, etc.) ) to extract coalbed methane, and if necessary, hydraulic or blasting measures should be taken to increase the air permeability of the coalbed and increase the extraction volume of coalbed methane. In mining ar...

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Problems solved by technology

However, the law of adsorption and desorption of coal bodies under high temperature and high pressure environment created during the heat injection process is still unclear, especially for the deformation of coal bodies during the process of coal body adsorption and desorption under high temperature and high pressure environments, in-depth experimental and theoretical research is needed

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