【摘要】 根据热弹性力学、对流弥散理论和多孔介质热力学原理,建立了包含煤的变形方程、气体运移方程、热传导的注气驱替热-流-固多物理场全耦合数学模型,求解耦合模型,研究温度场对注气驱替开采煤层气运移过程的影响。结果表明:煤层温度升高可以促进煤层气解吸,加速煤层气产出。研究成果可为注气驱替开采煤层气工程实践提供相应的理论基础,对深部开采高瓦斯矿井时施行先抽后采技术具有借鉴意义。更多还原

【Abstract】 According to the thermoelasticity, convention and dispersion theory and porous medium thermodynamics, the thermal-hydrological-mechanical coupling equations of enhancing coal bed methane have been established in terms of coal deformation, gas migration and heat transport. The numerical solution has been presented in order to investigate the effect of the temperature field on the gas migration in enhancement of coal bed methane. It demonstrates that rising temperature can promote desorption of coal bed methane and quicken coal bed methane production. The results can provide a corresponding theoretical basis for engineering practices of exploiting coal methane, more over it can be referred by the technology of draining gas before extracting coal gassy mining in deep coal seam.更多还原