Study on gas outburst prevention technology with surface gas drainage for seam opening area in mine shaft
Cao Zuoyong
Xu Youlin
Wang Enyuan
Du Hong
Zhang Dongliang
Luo Rongbin
Abstract：In order to ensure a safety seam opening in a new mine with the coal outburst and to improve the gas drainage and outburst elimination effect of the surface gas drainage well,a study was conducted on the selection of the gas drainage well,the gas drainage technique and technology,the gas drainage effect prediction and other aspects in Guanzhai Mine.The restdts showed that when the surface gas drainage was conducted in the complicated geological structure area,due to the fault development and the unstable seam deposition,a horizontal gas drainage well was not suitably constructed and a vertical well and directional well would be pertinence and suitability.A perforation should be conducted within 20 m of the seam with outburst danger.A pumping bridge plug sectional fracturing was applied to the hydraulic fracturing reconstruction.When the fracturing completed,seam combined drainage was applied to the reconstructed seam and the drainage effect was excellent.The engineering practices showed that the surface gas drainage well applied to the mine gas drainage could effectively reduce the danger of the coal and gas outburst and could ensure the safety construction in the mine shaft.
Keywords：gas drainage wellcoal and gas outburstseam opening in mine shaftnumerical calculation
Publication Date：2017-01-01
Pages：5( 73-77 )