Research article of American Journal of Scientific Research and Essays
Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining
Zhang Bo1, Xie Xionggang1,2
1Guizhou University, Guiyang 550025, China; 2Key Laboratory of Mineral Resources and High Efficiency in Karst Region, Guiyang 550025, China
In order to verify the effect of heating on the effect of coal seam extraction,based on the theory of elasticity, seepage mechanics and heat transfer,a Thermal-Hydrological-Mechanical coupling model for gas extraction in high temperature field is established.The numerical simulation was carried out in the engineering background of Qinghe coal mine in China.The changes situation of gas pressure and permeability under the conditions of different heating temperature were calculated respectively.The following conclusions are drawn:(1) The coupled thermo-hydro-mechanical model of gas drainage under temperature field is established, and the gas drainage effect under different working conditions is verified by numerical simulation.(2)When the heating temperature is below 453K, the high temperature can increase the permeability of coal seam,but it can not greatly increase the permeability of coal seam, and it has little effect on the reduction of coal seam gas pressure. It shows that the method of increasing coal seam permeability by heating coal can not reach the expected effect.
Keywords: coalbed methane; high temperature field; thermal fluid solid coupling; heating mining; permeability; numerical simulation.
How to cite this article:
Zhang Bo and Xie Xionggang. Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining. American Journal of Scientific Research and Essays, 2018 3:13. DOI:10.28933/ajsre-2018-12-0808
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