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IMPROVEMENT OF ECONOMIC EFFICIENCY OF LONGWALL MINING, IN SHORT PANELS, IN THE CASE OF JIU VALLEY THICK COAL SEAMS

Ilie Onica

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s03.120View metrics

Abstract

In the Jiu Valley coal basin (Romania), fr om over 2 thousand million tonnes of balance reserve, more than 60% are involved in the bituminous coal seams no.3 and no.5, which ensure 90% of the coal output of the entire basin. The thick coal seams no.3 is mined in slices with longwall mining system and roof control by caving. Because of the short mining panels, often under 300-400m, the star ting costs of mining panels become very important at the entire panel coal reserves. Th erefore, in this paper there are presented some starting mining technologies that reduce the coal mining costs, in the case of slices mining. Also, it is made a comparative technical and economical analysis, between these three starting systems, depending on the panel width and length.

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Publication details

Title
IMPROVEMENT OF ECONOMIC EFFICIENCY OF LONGWALL MINING, IN SHORT PANELS, IN THE CASE OF JIU VALLEY THICK COAL SEAMS
Authors
Ilie Onica
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
References6

  1. Alm ăşan,B. Mining of the Romanian Mineral Deposits Tom.I, (in Romanian), Technical Publishing House, Bucharest, 1974, pp.70-180;

  2. Covaci, Ş. & Ilia ş,N. & Onica,I. & Zamfir,V. & Andraş ,I. Improving the Technologies of Thick Seams Mining in Slices in Jiu Valley (Romania) by Using Reversible Powered Supports, Proceedings of the World Mining Congress, Tom I, Madrid 25-29 May, 1992, pp.235-244;

  3. Cozma,E. & Onica,I. & Cozma,B. & Chir il,G. Coal mining in the Jiu Valley basin – achievements and expectations, Proceedings of the 21 st World Mining Congress, Krakow, 7-11 September, 2008, pp.73-78;

  4. Ilia ş,N. & Zamfir,V. & Onica,I. et.al., Improving Thick Coal Seam Mining Technologies in the Jiu Valley by Employing Special Powered Support of Great Height, Proceedings of the World Mining Congress, Tom 2, Sofia, Sept. 1994, pp.28-33;

  5. Onica,I. Contributions to the Im provement of the Longwall Mining Faces Technologies, in the Conditions of the Thick Coal Seams of the Jiu Valley Coal Basin (in Romanian), Ph.D, Thesis, Petroşani, 1995, pp. 126-130;

  6. Onica,I. & Chiril,G. Top Coal Caving Mining in Longwall Faces (in Romanian), AGIR Publishing House, Bucharest, 2005, pp.200-202;

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