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Abstract
During underground coal gasification (UCG), whereby coal is converted to syngas in situ, a cavity is formed in the coal seam. The cavity growth rate (CGR) or the moving rate of the gasification face is affected by controllable (operation pressure, gasification time, geometry of UCG panel) and uncontrollable (coal seam properties) factors. The CGR is usually predicted by mathematical models and laboratory experiments, which are time consuming, cumbersome and expensive. In this paper, a new simple model for CGR is developed using non-linear regression analysis, based on data from 11 UCG field trials. The empirical model compares satisfactorily with Perkins model and can reliably predict CGR.
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Details
1 Yazd University, Department of Mining and Metallurgical Engineering, Yazd, Iran (GRID:grid.413021.5) (ISNI:0000000406128240)
2 Shahrood University, Faculty of Mining Engineering, Petroleum and Geophysics, Shahrud, Iran (GRID:grid.440804.c)
3 Shahrood University, Department of Mathematics, Shahrud, Iran (GRID:grid.440804.c)