爆破振动主动与被动控制技术在水下钻孔爆破中的应用

为使水下钻孔爆破振动控制达到最佳效果,以重庆长江果园港港池爆破开挖工程为依托,将主动与被动控制技术联合运用于临近高桩码头的爆破振动控制实践中。采用Sadaovsk公式对质点振速进行初估,确定爆破振动控制的必要性。基于主动控制与被动控制理论,从减震孔、爆破监测、起爆方式和堵塞措施等方面,确定具体爆破振动控制方案。采用考虑高差因素影响的振速修正公式,对临近高桩码头实际爆破监测数据进行回归分析,与理论值对比可知,现场爆破振动控制措施合理,爆破效果安全高效,为今后类似工程提供了可借鉴的经验。

Application of Active and Passive Blasting Vibration Control Technology in Underwater Drilling Blasting

To obtain the good effect on the vibration controlling of underwater drilling blasting,the active and passive control technology were applied near high-pile wharf in the blasting excavation engineering in Orchard harbor basin over the Chongqing Yangtze River. The blasting vibration velocity was preliminarily estimated through the Sada-ovsk formula,which ensured the necessity of blasting vibration control. Based on the theory of active and passive blas-ting vibration controlling,the scheme of blasting vibration controlling was confirmed through several aspects,including damping hole,blasting monitoring,detonating mode and stemming measures. According to the actual blasting monito-ring data,the regression analysis was conducted to calculate the vibration velocity of the high-pile wharf with the the corrected formula,where the altitude effect was taken into consideration. Comparing the value with the theoretical val-ue,conclusion is drawn that the blasting vibration control measures were reasonable and the blasting effect was effi-cient and safe enough.