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通过边坡爆破震动监测,得到了场地爆破地震波衰减经验公式。分析了垂直震速与爆心距之间的关系,得出了爆心距在20 m以内时,垂直震速衰减较快;大于20 m时,垂直震速衰减趋势减弱,最终趋于平缓。通过对边坡动力响应下的稳定性进行分析,给出了垂直震速的临界值和爆破允许比例装药量。
Through the monitoring of slope blasting vibration, the empirical formula of attenuation of the site blasting seismic wave is obtained. The relationship between the vertical velocity and the distance between the fobs is analyzed. It is found that the vertical velocity decays rapidly when the distance between the foci is within 20 m. When the velocity exceeds 20 m, the decay tendency of the vertical velocity decreases and finally tends to be gentle. By analyzing the stability under the dynamic response of slope, the critical value of vertical velocity and the allowable proportion of blasting are given.