Summary
A two dimensional finite element model is used to simulate the extraction of coal by the longwall method underneath idealized surface slopes. The resulting subsidence, tilt and horizontal displacement values are compared with similar extractions using the same method beneath initially horizontal surfaces. The conclusions of a parametric study using this model, supported by field evidence, indicate that in areas of rugged topography, simple application of the procedures outlined in the National Coal BoardSubsidence Engineer's Handbook (1975) does not give acceptable predictions of the induced ground movements.
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Adamek, V. and Jeran, P.W. (1982) Evaluation of surface deformation characteristics over longwall panels in the Northern Appalachian Coalfield, inSymposium Proceedings, State of the Art of Ground Control in Longwall Mining and Mining Subsidence, Honolulu, Hawaii, ASME, pp. 183–98.
Allgaier, F.K. (1982) Surface subsidence over longwall panels in the Western United States, inSymposium Proceedings, State of the Art of Ground Control in Longwall Mining and Mining Subsidence, Honolulu, Hawaii, ASME, pp. 199–210.
Conroy, P.J. and Gyarmaty, J.H. (1982) Planning subsidence monitoring programs over longwall panels, inSymposium Proceedings, State of the Art of Ground in Longwall Mining and Mining Subsidence, Honolulu, Hawaii, ASME, pp. 225–34.
Forrester, D.J. and Whittaker, B.N. (1976) Effects of mining subsidence on colliery spoil heaps, Part 2. Deformational behaviour of spoil heaps during undermining.International Journal of Rock Mechanics and Mineral Science and Geomechanical Abstracts 13, 121–33.
Franks, C.A.M. (1983)An Analysis of the Effects of Hillside Topography on Mining Subsidence in the South Wales Coalfield. PhD thesis, University of Wales.
Franks, C.A.M. and Geddes, J.D. (1985) A comparative study by numerical modelling of movements on sloping ground due to longwall mining, inProceedings of the 3rd Conference on Ground Movements and Structures, Pentech Press, London, pp. 377–96.
Geddes, J.D. (1985) Discussion.Proceedings of the 3rd Conference on Ground Movements and Structures, Pentech Press, London, p. 834.
Gentry, D.W. and Abel, J.F. (1978) Surface response to longwall coalmining in mountainous terrain.Bulletin of the Association of Engineering Geologists 15, 191–220.
Kapp, W.A. (1973) Mine subsidence, inProceedings of the 4th Symposium of the Australian Institute of Mineralogists and Metallurgists, Illawara, 1.1–1.9.
Kapp, W.A. (1982) A review of subsidence experiences in the Southern Coalfield, New South Wales, Australia, inSymposium Proceedings, State of the Art of Ground Control in Longwall Mining Subsidence, Honolulu, Hawaii, ASME, pp. 167–82.
National Coal Board (1975)Subsidence Engineers Handbook, 3rd edn, Coal Board Mining Department, London, pp. iii-111.
Siddle, H.J., Oliver, M.E. and Ansell, P. (1985) The effect of mining subsidence on spoil heap stability — a case history, inProceedings of the 3rd Conference on Ground Movements and Structures, Pentech Press, London, pp. 264–78.
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Franks, C.A.M., Geddes, J.D. Subsidence on steep slopes due to longwall mining. International Journal of Mining and Geological Engineering 4, 291–301 (1986). https://doi.org/10.1007/BF01552958
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DOI: https://doi.org/10.1007/BF01552958