Yang Dong Mine Goaf Roof Caving Simulation Experiment And The Study Of Gas Extraction

In the process of under ground coal resources,how to ef fectively draw the gas in the coal seam is a key problem to ensure the safety of coal production and reduce the environmental pollution of coal m ining.In the traditional gas drainag e project,the influence of the gas on the atmosphere directly to the ou tside is larger,which is not consistent with the cu rrent development of China's ecological env ironment and the development of green econom y.At the sam e time,all kinds of security risks in the process of gas drainage,it has becom e the "bottleneck" of the healthy developm ent of coal mining industry in China.In view of the problem of gas treatment in coal mining,the domestic and intern ational academic and engineering circles have m ade a lot of exploration.Although there are some technical progress in the process of coal mining,it is affected by the gas distribution,m igration and occurrence and other factors.In order to realize the accurate calculation of gas distribution and migration law,there is a great difficulty in reality.On the basis of previous studies,this paper puts forward a classification method of gas drainage,which is suitable for the evalua tion of gas drainage in coal m ine.On the basis of the theory of gas control m ethods are discussed briefly,and gives the V ance Yangdong mine drainage concrete design method and technical parameters.Through the example of Yangdong mine introduced before mining pumping regional gas coal seam gas drainage method.At the same time,starting from the actual internal Yangdong mine mine in the study,on the basis of theoretical analysis by means of mathematical model and laboratory simulation methods of gas occurrence and migration in Yangdong mine on the natural characteristics are analyzed,combined with field calibration test.The gas migration law in Y angdong mine after mining analysis and system and expounds the extraction strategy,and provi de decision support for safe ty production and promote ecological Yangdong mine coal mining.