一、前言 在英国煤矿中,巷道的开凿大都是用悬臂式掘进机旋转切割头上的截齿机械切割岩层。这种方法要比使用钻爆法优越,因为省时间、省力气、劳动强度低,而且不会造成巷道围岩陷落。然而截齿被限制在低抗压强度的岩石巷道中使用,这是由于截齿不能有效地切割岩石。 First, the preface In the British coal mines, tunnels are mostly cut with a cantilevered boring machine rotary cutting head cutting mechanical cutting rock formation. This method is superior to using the drill-and-blast method because it saves time, effort and low labor intensity, and does not cause the surrounding rock to fall into the roadway. However, picks are limited to rock tunnels with low compressive strength because the picks can not effectively cut the rock.