Relative pressure determination technology for effective radius found on gas content
Abstract：According to the problem that existing method for determining effective drainage radius of coal seam gas is poor practicality,based on parabolic equation relation between gas content and gas pressure,the relation between gas pressure change and gas drainage efficiency was deduced,and invented the relative pressure determination technology for effective radius found on gas content.The relation between drainage radius and drainage time was determined by the change of gas pressure with drainage time,and determined borehole space,drainage time and other drainage parameters,and avoided drainage blanking zone and invalid overlap of borehole in devising drainage borehole,enhanced gas drainage efficiency.
Keywords：gas contentrelative pressureeffective radiusdrainagegas drainage efficiency
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)