岩石钻爆开挖中预裂缝的隔震效果分析

通过应力波与由节理刚度系数描述的预裂缝的相互作用分析，考虑预裂缝在爆炸应力波作用下的闭合效应及预裂缝充水等条件下，研究了预裂缝的隔震机制与隔震效果，从而为岩石开挖过程中周边控制爆破方式的优选提供了理论依据。

ANALYSIS OF VIBRATION ISOLATING EFFECT OF PRE SPLITTING CRACK IN ROCK EXCAVATION BY BLASTING

In this paper,through the analysis of interaction between explosion stress waves and the pre splitting crack whose interface strength is described with joint stiffness,and in consideration of the enclosure of crack caused by the incidence of stress waves under the condition that the crack is filled with water.The vibration isolating mechanism and the effect of pre splitting crack are studied,on the basis of which we propose a theoretical method for the optimum choosing of the contour control blasting in rock excavation.