Measuring method and device for gas adsorption capacity and adsorption deformation of coal rock under stress conditions

A gas adsorption and coal-rock technology, applied in the measurement of coal-rock gas adsorption and adsorption deformation under different stress conditions, a device for measuring coal-rock gas adsorption and adsorption deformation, in the field of measuring coal-rock gas adsorption and adsorption deformation, to achieve The result is accurate and reliable, the principle is simple and correct, and the effect of the principle is simple

Inactive Publication Date: 2011-12-28
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The adsorption deformation is caused by the adsorption of gas by coal rocks, so the study of coal rock adsorption deformation must be related to the adsorption amount, and the relationship between coal rock a

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  • Measuring method and device for gas adsorption capacity and adsorption deformation of coal rock under stress conditions
  • Measuring method and device for gas adsorption capacity and adsorption deformation of coal rock under stress conditions

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing, the present invention will be described in further detail:

[0049] A method for measuring coal gas adsorption capacity and adsorption deformation under stress conditions, the steps are as follows:

[0050] 1. Process the coal rock into a cylindrical sample 3.3;

[0051] 2. Wrap the cylindrical sample 3.3, the first porous gasket 3.4a, the second porous gasket 3.4b, the end pad 3.5 and the base of the sample tank 3.6 with the sealing material 3.8, and place them in the sample tank 3.1 , and connect the gas injection pipeline connected to the two ends of the cylindrical sample 3.3 in the sample tank 3.1;

[0052] 3. Open the first valve 2.4a of the liquid inlet of the confining pressure control metering pump 2.2a, open the confining pressure control metering pump 2.2a, fill the confining pressure control metering pump 2.2a with confining pressure liquid 3.2, close the confining pressure control metering pump 2.2 The first...

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Abstract

The invention discloses a method and a device for measuring gas adsorption quantity and adsorption deformation of coal rock under a stress condition. The method comprises the following steps of: processing the coal rock into a cylindrical sample; wrapping the cylindrical sample, a gasket and the base of a sample tank through a sealing material; vacuumizing; filling gas in a gas injection meteringpump; opening an ambient pressure control metering pump, injecting ambient pressure liquid in the tank, and recording volume and pressure of liquid in the ambient pressure control metering pump; opening the gas injection metering pump; injecting gas; recording volume and pressure of gas in the gas injection metering pump; and calculating the adsorption quantity and the adsorption deformation. A sub-system is connected with a valve in a fluid injection and control sub-system. The sub-system is connected with a fluid passage hole in a tank sub-system through a stainless steel pipe. The valve inthe sub-system is connected with a four-way in the fluid injection and control sub-system. The ambient pressure control metering pump in the fluid injection and control sub-system is respectively connected with an acquisition card in a data acquisition sub-system through a cable. The method and device disclosed by the invention has the advantages of simple principle, clear structure, simple and convenient operation and accurate and credible result.

Description

technical field [0001] The present invention relates to the technical field of testing coal rock characteristics, more specifically to a method for measuring the gas adsorption and adsorption deformation of coal rock, and also to a device for measuring the gas adsorption and adsorption deformation of coal rock, especially a suitable A method and device for measuring the adsorption capacity and adsorption deformation of coal rock gas under different stress conditions. Background technique [0002] Due to the large number of pores in its structure and the large surface area, coal rock has the ability to adsorb gas. A large number of studies have shown that coal rocks will deform after adsorbing gas, which will affect the pore structure of coal rocks, and then affect the flow parameters such as the permeability of coal rocks, thereby affecting the coalbed methane (CH 4 ) mining. [0003] The adsorption deformation is caused by the adsorption of gas by coal rocks, so the study...

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Application Information

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IPC IPC(8): G01N15/08G01N7/10
Inventor 方志明李小春黄琳付旭
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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