Experimental study on thermodynamic process of coal and gas outburst

doi:10.16265/j.cnki.issn1003-3033.2017.05.019

Abstract

Abstract: In order to further improve forecasting of major disasters in mines such as coal and gas(methane) outburst, some quantitative studies were carried out on the thermodynamic phenomena in the whole process of coal and gas outburst. Coal samples crushed were pressed and molded in a similar simulation test bed of coal and gas outburst. Adsorption, desorption and coal and gas outburst tests of the coal samples with different particle sizes were carried out. Variation in coal temperature during the test was obtained. The results show that the evolution of coal body temperature can be described by a natural logarithm function in the process of coal and gas outburst, that the coal particle size has a significant effect on the variation in coal temperature, and the smaller the coal particle is, the greater and faster the variation in temperature will be, and that the coal particle size determines the gas adsorption capacity and the gas internal energy, and in turn, the gas internal energy determines the coal and gas outburst intensity to a great extent.

Key words: temperature, adsorption, desorption, coal and gas outburst, thermodynamics

CLC Number:

X936

WU XIN, LI Ji, LI Guohui, NIE Wen, TU Zihan. Experimental study on thermodynamic process of coal and gas outburst[J]. China Safety Science Journal, 2017, 27(5): 105-110.

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