Numerical Simulation Study on Evolution Law of Radial Seepage Flow in Coal Seam Water Injection Borehole
In order to study the radial seepage evolution law of coal seam water injection borehole,based on the basic theory of seepage,used Fluent software to simulate and analyze wetting range and seepage velocity of the coal body in the radial borehole under different water injection pressures.The results show that under the same drilling conditions,with the increase of water injection pressure,the average water pressure and average seepage velocity attenuation in the coal seam are more and more obvious.The effect ranges of water injection pressure on the pressure distribution and seepage velocity in the coal seam around the borehole are gradually expanded.The density change in the coal body is more and more rapid.The water injection in the coal body is more uniform,the water injection effect is better.This research result is of great significance for enhancing the effectiveness of dust suppression through coal seam water injection.
coal seam water injectionnumerical simulationseepage evolution lawpore water pressure
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