Influence of Coal Seam Permeability on Accuracy of Manometry Results by Active and Passive Gas Pressure Measurement Methods

In order to study the influence of coal seam permeability on the accuracy of manometry results by active and passive gas pressure measurement methods, through building a mathematical model of the balancing process of gas pressure, combined with the analysis of the similarity theory and laboratory tests, we obtained the influence variation of coal seam permeability on the error of results and the balancing time by active and passive gas pressure measurement methods.