Numerical Simulation of Coal-Seam Gas Drainage Based on Solid-Gas Coupling Model

Shuo Wang

Research output: ThesisMaster's Thesis

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Abstract

Gas drainage is one of the important methods to prevent gas accidents in coal mines. In order to accurately reflect the gas migration law of the gas drainage process in the bedding and determine the reasonable boreholes layout parameters, the gas-solid coupling model of coal gas seepage was established with gas dynamics introduced diffusion coefficient, based on the coupling effect of elastic media with dual-pores and dual-permeability and combined with coal body deformation and permeability evolution. COMSOL Multiphysics was used to simulate gas drainage process in the bedding to explore the influence of different factors on the gas migration. According to the simulation results, the changing trends of coal seam gas pressure and permeability during the gas drainage process were analyzed under the different conditions including drainage time, negative pressure and boreholes diameter.
Translated title of the contributionNumerical Simulation of Coal-Seam Gas Drainage Based on Solid-Gas Coupling Model
Original languageEnglish
QualificationDipl.-Ing.
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • Moser, Peter, Supervisor (internal)
Award date25 Jun 2021
Publication statusPublished - 2021

Bibliographical note

embargoed until null

Keywords

  • Gas drainage
  • Solid-gas coupling model
  • Numerical simulation
  • Gas pressure
  • Permeability

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