This paper introduced emphatically to mining method for the ore-body of gentle dip and medium thickness under the condition of medium or poor stableness of country rocks in upper wall.

 
  • 本文着重介绍缓倾斜中厚;上盘围岩中稳到稳固性较差条件下的矿体的采矿方法改进实践过程.
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