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针对贵阳天河潭大道山体开挖爆破对周围民居建筑的安全威胁,通过现场爆破试验,分析比较了耦合生产爆破、空气间隔装药爆破、小孔径(Ф40 mm)爆破3种不同爆破方案的爆破振速峰值与爆破破碎效果,利用萨氏公式回归计算了不同爆破方案下以振速为安全判据的最小安全距离,结果表明,0.5 cm/s为控制标准下,耦合爆破、空气间隔(孔中部)爆破、小孔径爆破的安全距离分别为67,54,31 m,且小孔径的破碎效果最好。
Aiming at the safety threat to the surrounding residential buildings in the excavation of Tianhe Lake Road in Guiyang, the blasting vibration of three kinds of blasting schemes of coupled production blasting, air space charge blasting and small aperture (Ф40 mm) blasting are analyzed and compared through field blasting test Speed peak value and blasting crushing effect. The minimum safe distance with different vibration velocity as the safety criterion was calculated by regression of the Saxon formula. The results showed that under the control standard of 0.5 cm / s, the coupling blasting, the air spacing ) Blasting, small aperture blasting safety distances were 67,54,31 m, and the small aperture crushing effect is best.