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冲击凿入是冲击式凿岩的基本动作。本文利用纵波在钎杆中传递的理论,及视钎刃所受的载荷和其侵入深度有直辅的关系,分析了活塞-钎杆-岩石间的作用过程.得出的凿入深度随时间的变化如下:(?)式中:U——凿入深度;tl——时间;m——钎杆的波动惯量;V_y——活塞的冲击速度;K——凿入系数;α=m/M,β=K/m,γ=α/β.当tl=lnγ/(α-β)=t_M时,凿入的深度最大,它是:(?)在引用此结果来讨论各因素对凿岩速度的影响时,和众所周知的经验关系甚相符合,从而揭示了它的物理意义.
Impact chiseling is the basic operation of impact rock drilling. In this paper, the theory of the transmission of the longitudinal wave in the drill rod and the relationship between the load and the penetration depth of the drill tip have the direct auxiliary relationship, and the action process between the piston and the drill rod and the rock is analyzed. The changes are as follows: () Where: U - depth of penetration; tl - time; m - wobbler inertia; V_y - piston impact speed; K - chiseling factor; α = m / When tl = lnγ / (α-β) = t_M, the depth of chiseling is the largest, which is: (?) Citing this result to discuss the effect of various factors on chisel The impact of rock velocity is in good agreement with the well-known empirical relationship, thereby revealing its physical significance.