爆破作用下高边坡的地震效应及控爆减振方法研究

岩质边坡在爆破开挖过程中的稳定问题是一个亟待解决的重要问题.从爆破地震效应分析入手,探讨了爆破地震强度的变化规律.通过对爆破荷载作用下不同岩土介质高边坡的动态响应和爆破震动对边坡的作用机理研究,探讨了爆破地震波在高差和坡度存在的岩石高边坡介质中的传播机理和高陡边坡控爆减震的基本原理.提出了爆破地震波的分离阻隔、分散装药减小震源能量、多段延时减小单响爆震.选用低密度低爆炸药及合理的装药结构等减振方法.在实际工程中综合应用以上方法,达到了理想的效果.

Seismic Effect of High Slope under the Action of Blasting Load and Research on Blasting Vibration Reduction Methods

Stabilization problem of rock slope during blasting excavation is an important problem to deal with. In this paper, the blasting seismic strength rule is researched according to analysis of blasting vibration effect. The dynamic response of high slope in different media under the action of blasting and the action mechanism of blasting vibration to slope are studied. Thus mechanism of propagation of blasting seismic wave and basic principle of damping vibration during controlled blasting in rock high slope are discussed. Relativey methods of reducing vibration are put forward, such as separation and isolation of blasting vibration, dispersive charge to reduce hypocentral energy, multi-stage time delay to reduce vibration of single shot, low explosive with low density and reasonable loading structure. The methods above are combined in realistic engineering and ideal achieve are obtained.