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- W2502345793 abstract "On the basis of basic theories on gas flow and coal deformation, the coupled gas-rock model for investigating the failure process of coal-rock is established by introducing the related equations governing the evolution of stress, damage and gas permeability along with the deformation of coal and rock. Implemented with Rock Failure and Process Analysis code (RFPA), this model can be used to capture the evolution of gas permeability in coal seam with deep depth and the distribution of gas pressure around the drilling hole, and explore the instantaneous seepage mechanism of gas flow. From the simulated results, it can be found that the coal seam, located around 67m above the excavating seam, is in unloading state and its gas permeability dramatically increases about 2, 000 times as excavating in underlying coal seam. And the size of the unloading region is around 70m in diameter. The simulated results are keeping in good accordance with the in-situ evaluation. Therefore, it is safe to say that this numerical tool is of significance in both theory and practice to investigate the mechanisms of gas permeability evolved and gas drainage." @default.
- W2502345793 created "2016-08-23" @default.
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- W2502345793 date "2008-01-01" @default.
- W2502345793 modified "2023-09-24" @default.
- W2502345793 title "Back-Analysis of Parameters of Gas Eztraction by Relief Pressure from a Long-Distance Using RFPA2D-GASFLOW Model" @default.
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