The spoiling is a key factor influencing the advance speed for the shaft excavation,especially for the excavation of large cross section and deep shaft.

 
  • 對于豎井開(kāi)挖 ,尤其是大斷面深豎井開(kāi)挖 ,出碴這一環(huán)節 ,往往是決定掘進(jìn)速度快慢的關(guān)鍵因素。
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