工程爆破地震安全问题

本文论及与工程爆破地震安全有关的问题，主要包括瀑破地震动衰减规律、爆破地震动与爆破减震设计、分段爆破与地震动叠加、爆破地震动持续时间等。与安全相关的爆破地震动参数主要包括地震动幅值、频谱和持续时间等。为减小爆破地震的影响，爆破减震设计常采用分没爆破和预裂爆破的方法。分段爆破会产主地震动的叠加，叠加系数直接关系到等效药量的计算。瀑破地震动持续时间与叠加系数的关系甚大，对持续时间的试验与研究对爆破减震设计和工程安全都是有价值的。

SAFETY OF GROUND MOTION IN ENGINEERING BLASTING

Some problems on safety in blasting practice are discussed in this paper,mainly including the attenuation law of ground motion in blasting operation,ground motion in blasting and blasting isolation design,sectional blasting and superposition of ground motion,and duration of ground motion in blasting.The parameters of ground motion related to safety mainly include amplitude of ground motion,frequency spectrum, duration of ground motion,etc,In order to reduce the influence of ground motion in blasting,the sectional blasting and pre-fracturing blasting technology is usually used for blasting solation design. The sectional blasting will produce superposition of ground motion The superposition factor is directly related to the calculation of equi-valent amount of explosive. The duration of ground motion in blasting is losely related to the superposition factors.The research on duration of ground motion is valuable for blasting isolation design and engineering safety.