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基于多年使用天井钻机掘进天井的经验,可以认为这是最先进的天井掘进法。这种掘进法的效果在很大程度上与刀盘装备的球齿滚刀的工作可靠性和寿命有关。
Based on years of experience in the use of a pit boring machine to pit the pit, this is the most advanced method of pit boring. The effect of this method of heading is to a large extent related to the operational reliability and longevity of the hob gear equipped on the cutterhead.