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电钻是利用旋转式钻眼方法的采掘工具。电钻的钻头紧压在岩石上使岩石局部破碎,钻头乃得钻入岩石内;再利用钻头的不断旋转,其前刃面对岩石作用-破碎力,使岩石沿着易于破碎的方向破碎—即沿破碎角表面剪破碎。因此,这一破碎力其沿破碎角方向的分力应大于岩石的临界抗剪强度。所以说:电钻是利用钻头的旋转力矩,来剪切掉钻头周围岩石。 电钻的能量消耗有以下几方面 1.剪切掉钻头周围岩石所消耗的能量; 2.克服钻头顶端和岩石之间产生的摩擦阻力矩而消耗的能量;
Electric drills are mining tools that use rotary drilling methods. The bit of the electric drill is pressed against the rock to partially crush the rock. The drill bit has to drill into the rock. With the continuous rotation of the drill bit, the front edge of the bit is facing the rock-crushing force and breaks the rock in a direction that is easy to break—that is, Shred the surface along the crushing angle. Therefore, the force of this crushing force in the direction of the crushing angle should be greater than the critical shear strength of the rock. Therefore, the electric drill uses the rotational torque of the drill bit to cut off the rock around the drill bit. The power consumption of an electric drill has the following aspects: 1. Cut off the energy consumed by the rock around the drill bit; 2. The energy consumed to overcome the frictional resistance torque generated between the top of the drill bit and the rock;