Numerical modeling of gas flow in coal pores for methane drainage

Author ORCID Identifier

Adel Taheri 0000-0002-1425-6408

Farhang Sereshki 0000-0002-2626-6865

Faramarz Doulati Ardejani 0000-0002-4951-8850

Ali Mirzaghorbanali 0000-0002-7967-9233


The sudden explosion of methane during underground coal mining is a major dilemma. To mitigate its occurrence and reduce the extent of methane diffusion, gas drainage operations are carried out before mining. This paper investigates methane gas flow in a coal block in order to calculate the pressure of gas and its molecule velocity for methane gas drainage operation. A coal piece surrounded by cleats was used for geometrical modeling and numerical simulation. Movements of fluid and gas molecules in a porous medium were successfully simulated. The numerical solution is based on COMSOL Multiphysics software. The validity of the numerical simulation was assessed using an analytical model with satisfactory results.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.