Journal of Applied Mathematics

  • J. Appl. Math.
  • Volume 2013, Special Issue (2013), Article ID 859803, 12 pages.

Longwall Mining Stability in Take-Off Phase

María-Belén Prendes-Gero, José Alcalde-Gonzalo, Pedro Ramírez-Oyanguren, Francisco-José Suárez-Domínguez, and Martina-Inmaculada Álvarez-Fernández

Full-text: Open access

Abstract

Mechanised longwall mining is one of the more commonly employed exploitation methods in underground mines in the north of Spain as well as in the rest of the world. It is continuously changing and evolving, with new techniques, technology, equipment, and face management practices and systems appearing for the purposes of improving aspects such as operational and financial performances and, above all, the safety of the miners. Despite its importance, there are no regulations for the mining of longwall coal seams. This work aims to contribute to an advance in the design and optimisation of the roof support in longwall mining, analysing the stability of the roof using a method based on the resistance of materials, which considers the characteristics of the properties of the roof materials. The influence of not only the individual elements of support but also the coalface, which is considered one more supporting element, is investigated. The longitudinal and transverse spacings of the support and the number of walkways constituting the exploitation panel are analysed. The proposed formulation is validated by information gathered in a mine located in the region of Castilla-Leon.

Article information

Source
J. Appl. Math., Volume 2013, Special Issue (2013), Article ID 859803, 12 pages.

Dates
First available in Project Euclid: 14 March 2014

Permanent link to this document
https://projecteuclid.org/euclid.jam/1394807590

Digital Object Identifier
doi:10.1155/2013/859803

Citation

Prendes-Gero, María-Belén; Alcalde-Gonzalo, José; Ramírez-Oyanguren, Pedro; Suárez-Domínguez, Francisco-José; Álvarez-Fernández, Martina-Inmaculada. Longwall Mining Stability in Take-Off Phase. J. Appl. Math. 2013, Special Issue (2013), Article ID 859803, 12 pages. doi:10.1155/2013/859803. https://projecteuclid.org/euclid.jam/1394807590


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References

  • I. Rosal-Fernandez, “How costly is the maintenance of the coal-mining jobs in Europe? The Spanish case 1989–1995,” Energy Policy, vol. 28, no. 8, pp. 537–547, 2000.
  • Ministry of Industry, Energy and Tourism. Institute for Restructuring of Coal Mining and Alternative Development of Mining Regions. Report of the national strategic coal reserve 2006–2012 and new model for comprehensive and sustainable development of mining regions, 2013, http://www.irmc.es/.
  • RGNBSM, General Regulation of Basic Procedure of Mining Safety. Spain, Ministry of Industry and Energy, 2006, (Spanish).
  • J. Gómez de las Heras, Provisions and design support in unions panel-gallery on pit-horizontal layers machined. Madrid, Geo-Miner Technologic Institute of Spain, Ministry of Industry, Trade and Tourism, 1988, (Spanish).
  • R. Lindsay Galloway, A History of Coal Mining in Great Britain, Augustus M. Kelley, New York, NY, USA, 1969.
  • Energy Information Administration, Office of Coal, Nuclear, Electric and Alternate Fuels, Longwall Mining, U. S. Department of Energy, Washington, DC, USA, 1995.
  • Medium-term coal market report 2012, OECD Publishing. IEA, 2012.
  • Coal mining. World coal. World Coal Institute, 2009.
  • P. Darling, SME Mining Engineering Handbook, Society for Mining, Metallurgy, and Exploration (SME), 3rd edition, 2011.
  • A. A. Waddington and D. R. Kay, “Recent development in the incremental profile method of predicting subsidence, tilt and strain over a series of longwall Panels,” in Proccedings of the International Conference on Geomechanics/Ground Control in Mining and Underground Construction, Wollongong, Australia, July 1998.
  • A. García-Bello, J. Ordieres-Meré, and C. González-Nicieza, “Generalization of the influence function method in mining subsidence,” International Journal of Surface Mining, Reclamation and Environment, vol. 10, no. 4, pp. 195–202, 1996.
  • G. W. Mitchell, “Longwall mining,” in Australasian Coal Mining Practice, R. J. Kininmonth and E. Y. Baafi, Eds., pp. 340–373, The Australasian Institute of Mining and Metallurgy, Melbourne, Australia, 2010.
  • M. S. Venkata Ramayya and L. Sudhakar, “Selection of powered roof support for weak coal roof,” Journal of Mines, Metals and Fuels, vol. 50, no. 4, pp. 114–117, 2002.
  • R. Singh and T. N. Singh, “Investigation into the behaviour of a support system and roof strata during sublevel caving of a thick coal seam,” Geotechnical and Geological Engineering, vol. 17, no. 1, pp. 21–35, 1999.
  • J. Ju and J. Xu, “Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0,m height chocks,” International Journal of Rock Mechanics and Mining Sciences, vol. 58, pp. 46–54, 2013.
  • N. Bilim and I. Özkan, “Determination of the effect of roof pressure on coal hardness and excavation productivity: an example from a Çay\irhan lignite mine, Ankara, Central Turkey,” International Journal of Coal Geology, vol. 75, no. 2, pp. 113–118, 2008.
  • C. González-Nicieza, A. Menéndez-Díaz, A. E. Álvarez-Vigil, and M. I. Álvarez-Fernández, “Analysis of support by hydraulic props in a longwall working,” International Journal of Coal Geology, vol. 74, no. 1, pp. 67–92, 2008.
  • R. Juárez-Ferreras, C. González-Nicieza, A. Menéndez-Díaz, A. E. Álvarez-Vigil, and M. I. Álvarez-Fernández, “Forensic analysis of hydraulic props in longwall workings,” Engineering Failure Analysis, vol. 16, no. 7, pp. 2357–2370, 2009.
  • R. Juárez-Ferreras, C. González-Nicieza, A. Menéndez-Díaz, A. E. Álvarez-Vigil, and M. I. Álvarez-Fernández, “Measurement and analysis of the roof pressure on hydraulic props in longwall,” International Journal of Coal Geology, vol. 75, no. 1, pp. 49–62, 2008.
  • S. P. Timoshenko and J. N. Goodier, Theory of Elasticity, McGraw- Hill, New York, NY, USA, 1970.
  • V. I. Klishin and T. M. Tarasik, “Stand tests of hydraulic props in dynamic loads,” Journal of Mining Science, vol. 37, no. 1, pp. 77–84, 2001.