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| Study on goaf gas migration law in Xinzhouyao Mine |
| Chen Junbiao |
| Xinzhouyao Mine, Datong Mining Group, Datong 037000, China |
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Abstract Goaf gas migration law was studied by combined theory analysis and numerical simulation in this paper. Two parameters permeability and quality source were settled by theory analysis, FLUENT model software was used to simulate goaf gas distribution law after mining. Air permeability of protective layer changed obviously after mining, the increase of air permeability makes gas extraction more easier and mining safer.
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