COAL ENGINEERING ›› 2014, Vol. 46 ›› Issue (3): 48-51.doi: 10.11799/ce201403016

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Study on effects of protective seam mining under the condition of high gas drainage efficiency

  

  • Received:2013-08-14 Revised:2013-10-04 Online:2014-03-14 Published:2014-03-15