Study on Comprehensive Technology of Coal and Gas Outburst Prevention in Mining Panels

With the goal to solve problems of coal and gas outbursts prevention in a mining panel, the method developed by the authors of this paper was employed to define the critical value of gas content based data form a panel of Mine A of a coal mining group in Shanxi Province. Outburst management in the panel was successfully implemented based on the defined critical value of gas content and gas geological maps. The principle of drainage borehole layout was studied in details. A mathematical model was established to determine reasonable drainage time, and a method was developed to evaluate the effects of measures on outbursts presentation. The research results show that coals with different rank have very different absorption capacity, and that the critical value of gas content is different and closely relevant to coal rank. Areas of outburst risk are clearly identified by gas-geological data shown on the gas-geology map, and the evaluation method was applied to make sure that the panel was free of outburst risk after gas drainage. The integration of all the research results eliminated outburst risk in the panel.