Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
Print version ISSN 0038-223X
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..