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• W2893626415 abstract "Due to the change of initial stress state caused by roadway excavation, the permeability of the coal body may be changed during the excavation process. In this paper, according to the different stress states, the coal around the roadway was divided into the seepage open zone, seepage orientation zone, seepage decay zone and original seepage zone along the radial direction of the roadway. The loaded gassy coal was treated as a viscoelastic and plastic softened medium, and the mechanical behaviors of the viscoelastic zone, plastic softened zone and broken zone around the roadway were analyzed with the consideration of the loading creep, softening and expansion effect of the gassy coal. According to the law of conservation of mass and the Darcy law, the flow-solid coupled model for the gas transportation of the coal around the roadway was established considering the dynamic evolution of the adsorption characteristics, porosity and permeability of the coal, and the simulation software COMSOL was utilized to numerically simulate the stress state and gas flow regularity around the coal, which provided meaningful reference for investigating the stability of the coal and rock around the roadway." @default.
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• W2893626415 date "2018-11-01" @default.
• W2893626415 modified "2023-09-30" @default.
• W2893626415 title "Numerical simulation research on dynamical variation of permeability of coal around roadway based on gas-solid coupling model for gassy coal" @default.
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• W2893626415 doi "https://doi.org/10.1016/j.ijmst.2018.09.004" @default.
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