Journal of Mining & Safety Engineering ›› 2017, Vol. 34 ›› Issue (1): 54-59.

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Instability mechanism and control technology of coal pillar bumps under hard roof

  

  • Received:2016-04-06 Online:2017-01-11 Published:2017-01-06

Key words:  , coal bumps;hard roof;blasting method with roof-broken;electromagnetic radiation