不同钻孔抽采参数下瓦斯运移规律研究

Study on gas migration law under different borehole extraction parameters

为了研究不同钻孔影响参数下瓦斯运移规律,分析了调研区瓦斯治理方式以及瓦斯—空气混合气体渗流控制方程,采用Comsol Multiphysics数值模拟,建立了瓦斯抽采数值模型,分析了不同瓦斯抽采负压、封孔长度以及钻孔孔隙率条件下瓦斯抽采浓度变化规律。研究为后期瓦斯抽采参数的设计提供了理论支持。

In order to study the gas migration law under the influence of different drilling parameters,the gas control mode and the gas air mixture seepage control equation in the investigation area were analyzed.The gas extraction numerical model was established by using the numerical simulation of Comsol Multiphysics,and the variation law of gas drainage concentration under the conditions of different gas extraction negative pressure,hole sealing length and hole porosity were analyzed.The research provided theoretical support for the design of gas extraction parameters in the later period.