Journal of Mining and Safety Engineering ›› 2020, Vol. 37 ›› Issue (6): 1180-1187.doi: 10.13545/j.cnki.jmse.2020.06.012

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Roof fracture and instability law of overlying strata in fully mechanized caving mining in ultra-close thick coal seams under the room mining goaf

  

  • Online:2020-11-15 Published:2020-11-27

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