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从爆破的观点上看,钻进斜孔大为有益,而就穿爆的经济效果而论,用大直径深孔时成本最低。然而,钻进大直径深孔最常用的牙轮钻机适于钻进垂直孔,而不宜钻进斜孔。牙轮钻机穿孔所需的钻压为每厘米钻头直径0.8～1.4吨。用牙轮钻机钻进垂直孔时,为了平衡垂直的反作用力,机重约2倍于钻压力值。用牙轮钻机钻进斜孔时,向后作用于钻机上的反力,其水平分力会引起钻
From the point of view of blasting, it is beneficial to drill oblique holes, and the economic cost of blasting is the lowest when using large diameter deep holes. However, the most commonly used roller-drills that drill large diameter deep holes are suitable for drilling vertical holes rather than drilling oblique holes. Drill bit perforation required for the bit per drill bit diameter of 0.8 to 1.4 tons. When drilling a vertical hole with a roller rig, the weight of the machine weighs about 2 times the value of the drill pressure in order to balance the vertical reaction force. When using a cone drill to drill a slant hole, the reaction force acting on the drill rig backwards causes the horizontal component of the force to cause the drill