Study on Controlling Parameters and Technological Optimization of Strip Longwall Top Coal Caving in Thick Coal Seams

  • Bui MANH TUNG Department of Underground Mining, Hanoi University of Mining and Geology, Hanoi, Vietnam
  • Le TIEN DUNG Department of Underground Mining, Hanoi University of Mining and Geology, Hanoi, Vietnam
  • Liu CHANG YOU School of Mines, China University of Mining and Technology, Xuzhou City, China
  • Pham VAN CHUNG Department of Mine Surveying, Hanoi University of Mining and Geology, Hanoi, Vietnam
DOI: https://doi.org/10.29227/IM-2020-02-14
Keywords: strip fully-mechanized caving, work face, caving technology, coal recovery rate

Abstract

Based on the geological and mining conditions of face 3107 at Liang Baoshi coal mine, China, the numerical programs FLAC3D 2.10 and PFC2D 2.10 were used to analyze the parameters controlling the failure, caving and the coal recovery rate in Strip Longwall Top Coal Caving (SLTCC). The analyzed parameters are face length in dip direction, mining height, the span of coal caving, and sequence of coal drawing. The results show that the application of SLTCC for a limited face length is not favourable to coal failure, and it increases top coal loss. A sound engineering selection of technological parameters is therefore important to efficient mining in thick coal seams. The numerical results show that a face design of 3 m of cutting height, 0.8 m of caving span, and alternate drawing sequence results in high coal recovery rate, simple mining tasks, and efficient operation of face equipment.

Published
2020-10-08
How to Cite
MANH TUNG, B., TIEN DUNG, L., CHANG YOU, L., & VAN CHUNG, P. (2020). Study on Controlling Parameters and Technological Optimization of Strip Longwall Top Coal Caving in Thick Coal Seams. Test, 1(2), 105–113. https://doi.org/10.29227/IM-2020-02-14
Issue
Vol 1 No 2 (2020): Inżynieria Mineralna
Section
ARTICLES

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