Research on mechanism of gas seepage in coal under the action of electromagnetic field

Lots of experiments have proved that electromagnetic field can influence gas flow in coals. On the basis of the experiment mechanism of gas seepage in coal under the action of electromagnetic field is studied from change of coal surface force under the action of electromagnetic field, infra-red spectroscopic analysis of magnetized coal, the effect of electromagnetic field on gas molecules and heat effect. The researches show that electromagnetic field reduces surface tension of coal and make active force between coal molecules and gas molecules decrease, so as to reduce adsorptive quantity of gas in coal and make gas seepage quicken. After coal is magnetized, infrared spectroscopic analyses indicate that electromagnetic field change polarity of some microscopic functional groups or functional groups and makes coal molecules repel gas molecules so as to influence gas seepage. In addition, gas molecules move more quickly and act more powerfully under the action of both electric field force and magnetic field force in order to accelerate gas seepage. And moreover, heat effect also promotes gas flow.