煤层气-水两相流固耦合渗流的数学模型

Coal-body and fluid in it is interact in the course of methane developing. The flow was two media flow of methane and water. So, it is necessary to research the interaction of the two media seepage. In this paper, the coal skeleton is assumed to have elastic-plastic behavior. According to the elastic-plastic theory, the deformation equations were given. On the base of Darcy’s law, the author gave the seepage field equations. The coupled mathematical model to describe the complex interaction of two fluid (methane and water) is developed by comprehensive analyses method. The model is useful in the numerical simulation of methane reservoir developing.