Abstract
China is one of the nations that have grievous coal and gas outburst problems, gas outburst prediction is the key technology of gas prevention and treatment, the critical value of gas outburst prediction index in relation to coal mine production safety and the economy. In order to study the evaluation index of the regional drainaged NO.3 coal seam in Sihe mine, based on the gas outburst integrative theory, proposes gas content under the corresponding beginning outburst gas pressure is treated as evaluation index critical value. Raw coal samples were taken on site and sealed, and their residual gas content and residual gas pressure were determined after adsorption equilibrium. By this method, the law of residual gas content and residual gas pressure of raw coal under the influence of original moisture is studied, and the corresponding gas content under initial gas outburst pressure is obtained, and the critical gas content value of 10m3/t is verified on the spot.
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