基于气固耦合理论瓦斯注气半径影响因素模拟研究

Simulation Study on Influence Factors of Gas Injection Radius Based on Theory of Gas-solid Coupling

为了能更加准确地分析影响注气半径的因素,以气固耦合理论为基础,利用COMCOL Multiphysics多物理场耦合软件对煤层注气影响半径进行了数值模拟。分析了不同注气时间、渗透率变化、注气压力变化对瓦斯注气半径影响。得到了钻孔垂直平面压力分布图和有效影响范围,对确定合理的注气时间和合理布置注气钻孔有一定的指导作用。

To analyze the factors that affected the radius of gas injection more accurately, COMCOL Muhiphysics coupling software, on the basis of gas-solid coupling theory, performed a numerical simulation of the influence radius of coal seam gas injection. Which analyzed the radius of gas injection under different gas injection time, permeability, gas injection pressures. Finally the drilling vertical plane stress distribution and effective scope are obtained, which is the guidance to determine a reasonable gas injection time and to arrange the proper gas injection hole.