Journal of Mining & Safety Engineering ›› 2017, Vol. 34 ›› Issue (2): 282-286.

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Roof structure analysis on large mining height longwall face in shallow coal seam

  

  • Received:2014-10-20 Online:2017-03-23 Published:2017-03-29

Abstract:  

Key words: shallow coal seam, large mining height, equivalent immediate roof, oblique step voussoir beam structure, support resistance