Articles | Volume 372
Proc. IAHS, 372, 455–462, 2015
https://doi.org/10.5194/piahs-372-455-2015
Proc. IAHS, 372, 455–462, 2015
https://doi.org/10.5194/piahs-372-455-2015

  12 Nov 2015

12 Nov 2015

Numerical and experimental study of strata behavior and land subsidence in an underground coal gasification project

N. N. Sirdesai et al.

Cited articles

Bell, D. A., Towler, B. F., and Fan, M. H.: Coal gasification and its applications, William Andrew/Elsevier, Oxford, 101–111, 2011.
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Cena, R. J., Britten, J. A., and Thorsness, C. B.: Excavation of the partial seam CRIP underground coal gasification test site, Proceedings of the 13th Annual Underground Coal Gasification Symposium, 24 August 1987, Laramie, Wyoming, USA, 1987.
Den'gina, N. I., Kazak, V. N., and Pristash, V. V.: Changes in rocks at high temperatures, J. Min. Sci., 29, 472–477, 1994.
Hajpál, M. and Török, Á.: Mineralogical and colour changes of quartz sandstones by heat, Environ. Geol., 46, 311–322, 2004.
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Short summary
Petro-physical and geomechanical properties undergo a drastic change due to heat generated during underground coal gasification. The thermal anisotropy of the minerals result in the generation of thermal stresses which result in fracturing of the rock. The new fractures lead to the failure of overhead strata thereby causing subsidence. This paper aims to predict the thermo-geomechanical response of the strata during UCG using COMSOL Multiphysics.