The computer program calculates transient, two-dimensional, gas- water flow in a porous medium. The gas flow obeys laminar darcy flow. The porosity permeability and reservoir thickness can vary with location. A moving boundary can be used to simulate a mine entry advancement. Gas-water relative permeabilities are inputs as functions of water saturation. This program supplements Bureau of Mines OFR 10-72 (pb 209 273).
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