کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
275337 | 1429548 | 2012 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Variation in gas drainage rate from a coal seam during mining Variation in gas drainage rate from a coal seam during mining](/preview/png/275337.png)
Gas flow patterns during draining of gas from a coal seam during mining are discussed. The coal seam is treated as a dual medium with both pores and cracks. The seepage, diffusion, and desorption processes are treated using a gas flow equation that describes flow around drill holes. MATLAB is used to solve the differential equations. The permeability tracer test results from a mined coal seam are used to study the variation in gas drainage from a coal seam during mining. The results show that mining can increase the permeability of a coal seam, which then increases the gas drainage. There are inflection points in this variation over time. A close relationship between this variation and the rate of change in coal seam permeability is observed.
Journal: International Journal of Mining Science and Technology - Volume 22, Issue 6, November 2012, Pages 859–862