COAL ENGINEERING ›› 2014, Vol. 46 ›› Issue (11): 8-10.doi: 10.11799/ce201411003

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Study on reasonable width of sections coal pillar in mining the ultra-cosemuti seam

  

  • Received:2013-11-11 Revised:2013-12-29 Online:2014-11-11 Published:2014-11-12