Study On Gas Disaster Management In North Second Panel Of Xima Mine

Gas is one of the major disaster mine production safety. Xima coal is of coal and gas outburst mines in Shenyang coal group, this thesis aims to coal mine gas with outstanding dangerous for gas disaster research. Through theoretical analysis and numerical simulation, put forward the scheme of taking protective-coat and adjacent layer gas drainage, formulating gas management measures for the blowout coal vein and realizing safety mining.Along with the increase of mining depth and intensity in Xima coal, making mine gas flow-volume increases year by year. Especially in North Second Panel, the layer spacing of 12 and 13 coal is close, allowing large numbers of 12 coal bed-gas flocked to the coal mining space in mining process. Among them 12 coal seam is the main mining layer and blowout coal vein, 13 coal seam isn't blowout coal vein. Based on the mining geological conditions of north two mining, proposed 13 coal as 12 coal layer of protection, on 12 row taked gas treatment method of winning protective-coat, and through drilling to extract 12 coal gas. This article through theory research, extraction parameter analysis, combined with the actual circumstance of working face, which summarized a set of suitable for the outburst prevention measures of this panel. In practice, calculating the reasonable drilling position, at the same time application software FLUENT simulation that gas extraction effect in different drilling spacing and the change of stress surrounding gas, to determine a optimization scheme reasonability.The findings reduced the gas concentration of 12 coal vein in north second mine, which eliminated gas disaster hazard. Never happen outburst disasters and ensuring safe production.