Abstract

HUANG, W.G. et al. Feasibility study on underground coal gasification of No. 15 seam in Fenghuangshan Mine. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.10, pp.897-903. ISSN 2411-9717.

To recover the coal resources of high-sulphur anthracite in Jincheng Mining Area, underground coal gasification (UCG) of No.15 seam in Fenghuangshan Coal Mine was proposed. The feasibility of the project was confirmed by investigations of occurrence conditions, coal properties, and roof conditions, as well as experimental studies and theoretical analysis. It was found that UCG technology is appropriate to be adopted in the mining of the No. 15 seam, due to the stable rock conditions, simple geological structure and hydrogeology, the high carbon content of the coal, non-cohesiveness, medium-thermal stability, high ash fusion temperature, and weak reactivity with CO₂. Further factors are the characteristics of the immediate roof, which consists of 9.11 m of limestone and mudstone with a compact structure and low permeability, and 4.27 m of dominantly mudstone with low permeability.

Keywords : No. 15 coal seam; underground coal gasification (UCG); galley-type UCG; occurrence conditions; coal properties; surrounding rock conditions..

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