Gas extraction is the main measure to prevent gas disasters.Reasonable extraction parameters can improve extraction efficiency and reduce the risk of gas accidents.In order to further study the influence of extraction parameters on gas extraction efficiency,combined with COMSOL Multiphysics numerical simulation and on-site experiments,two parameters,namely the spacing of pipe spacing and negative pressure extraction,were optimized for the 42201 working face of Tashan Coal Mine in Shanxi Province.A three-dimensional gas distribution model in goaf was established and calculated using COMSOL numerical simulation software,and combined with on-site experiments,the influence of pipe spacing and negative pressure extraction on the pumping effect was obtained.The results indicate that the pumping effect is ideal within the range of 50～70 m when the negative pressure is 12～18 kPa.
关键词
瓦斯抽放/插管间距/抽采负压
Key words
gas extraction/pipe spacing/negative pressure extraction
维普
万方数据