Temperature change measurement experiment device and method in coal adsorption and desorption process

Abstract

The invention belongs to the field of coal mine gas outburst disaster prevention and control, and particularly relates to a temperature change measurement experiment device and method in the coal adsorption and desorption process. The device comprises a high-pressure methane gas cylinder, a high-pressure helium gas cylinder, a reference tank and a sample tank, the reference tank is connected withthe high-pressure methane gas cylinder, the sample tank and a vacuum pump, a pressure reducing valve and a first valve are arranged on a pipeline between a high-pressure gas cylinder and the referencetank, a second valve is arranged between the sample tank and the reference tank, and a fifth valve and a vacuum meter are arranged between the vacuum pump and the reference tank; the reference tank,the sample tank and the vacuum pump are connected through a three-way valve, the sample tank is connected with an inlet of the three-way valve, and the reference tank and the vacuum pump are connectedwith an outlet of the three-way valve; the reference tank is provided with a a first pressure gauge, and the sample tank is connected with a second pressure gauge through a third valve. A first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor are connected with a temperature recorder, and the temperature recorder transmits data to a computer.

Description

Technical field[0001]The invention belongs to the field of prevention and control of coal mine gas outburst disasters, in particular to an experimental device and method for measuring temperature changes during coal adsorption and desorption.Background technique[0002]As the mine continues to extend to the depths, gas outburst disasters are becoming more and more serious. A large number of downhole actual conditions and gas outburst simulation experiments have proved that temperature changes will occur before gas outburst. Therefore, many scholars have proposed to use changes in coal body temperature as a predictive indicator of gas outburst. However, at present, the law of temperature change of coal and the mechanism of gas outburst are not yet clear.[0003]The changes in the occurrence state of gas in coal, namely adsorption and desorption, have an important influence on the formation of outbursts. Therefore, in the study of gas outburst, the study of gas adsorption and desorption m...

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Problems solved by technology

[0004] In order to accurately measure the temperature change value during the coal adsorption and desorption process, the present invention solves the problems of improving the adsorption and desorption mechanism and preventing and controlling coal and gas outburst disasters, and provides an experimental device and method for measuring temperature changes during the coal adsorption and desorption process

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