Study Of The Corresponding Relationship Between Raw Coal Gas Content And Gas Pressure Of Coal Mine In Changping

There come along some divergences in gas pressure and actual gas content when using gas content to predict regional outburst. For end, the gas content critical value was finally determined for regional outburst prediction by studying the relationship between gas content and gas pressure in Changping mine.Perform pressure restore test on site, combined with the high-pressure adsorption experiment under laboratory conditions to study the relationship between the raw coal gas content and gas pressure. By studying the relationship between gas content and gas pressure under different moisture distribution conditions when adsorption equilibrium, making models of relationship between gas pressure and gas content in different water partition, a comprehensive analysis of the relationship between gas pressure and gas content was finished, obtained gas pressure and gas content two critical curves of Changping Mine No.3 coal seam, determine the gas content forecast of outburst critical domain (10.22m~3/t,16.58m~3/t). Taking into account the occurrence of coal moisture imbalance, the complexity of coal seam gas adsorbed,the limitations of the test sample seam, based on the lower limit of the critical region is also considered a safety factor of 1.1, that is considered Changping No.3 coal seam using critical value 9.3 m~3/t coal seam gas content when regional forecasts.