Journal of Mining & Safety Engineering ›› 2017, Vol. 34 ›› Issue (2): 295-301.

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Action mechanism of the filling body in the upward-to-horizontal slice stoping-filling method with pointed pillars and shape optimization of pointed pillar

  

  • Received:2015-06-10 Online:2017-03-23 Published:2017-03-29

Key words: pointed pillar, backfill, down-pull effect, vertical stress, wide bottom and narrow top