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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。
In order to analyze the factors that affect gas injection radius more accurately, based on the theory of gas-solid coupling, the influence radius of gas injection on coal seam is numerically simulated by COMCOL Multiphysics multiphysics software. The influence of gas injection time, permeability change and gas injection pressure on gas injection radius was analyzed. The vertical pressure distribution chart and the effective influence range of the borehole are obtained, which has some guidance to determine the reasonable gas injection time and to arrange the gas injection borehole reasonably.