Solid-gas Coupling Mathematical Model of Coal and Rock Containing Gas in Mining Condition and Analysis of Coupling Effect

Based on elastic-plastic mechanics theory, seepage mechanics theory, gas diffusion theory and solid-gas coupling theory, the solid-gas coupling model of coal and rock containing gas in the mining condition was established. Taking Yuyang Coal Mine as the research background, the numerical simulation of solid-gas coupling effect under the mining condition was developed by using COMSOL Multiphysics. Experimental results show that the coupling model can fully reflect the coupling mechanism between the skeleton deformation, stress and gas migration of coal and rock containing gas field in the mining condition.