Mathematical model for coupled solid deformation and methane flow in coal seams

Abstract A mathematical model of coupled solid-gas for gas flow in coal seams is presented; the numerical method of the mathematical model and FEM computer program are given. The law of gas flow, radius of drainage, and the effective stress distribution in coal seams under the condition of gas exhaustion through the drilling hole are obtained by using the above methods. The calculation sample was selected from the first coal mine of Yangquan and the calculation result is compared with the field data. A few conclusions are given.