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在露天矿爆破施工现场,爆破震动严重影响周边建筑物的安全。为了确定爆破开挖对周边建筑物的影响情况,以贵州某磷矿爆破现场周边的某小学为监测对象布置监测系统。根据监测的结果,得出各测点在垂直向、水平径向和水平切向的振动传播速度,基于速度-频率双因素判据分析爆破对该建筑物的影响。根据分析结果,确定了爆破震动的传播规律,为后续爆破开挖提供了理论指导。
In opencast mine blasting construction site, blasting vibration seriously affect the safety of surrounding buildings. In order to determine the impact of blasting excavation on the surrounding buildings, a monitoring system was set up in a certain primary school around the blasting site of a phosphorite mine in Guizhou. According to the result of monitoring, the vibration propagation velocity at each measuring point in vertical, horizontal radial and horizontal tangential direction is obtained. The influence of blasting on this building is analyzed based on the two-factor criterion of speed and frequency. According to the analysis results, the propagation law of blasting vibration is confirmed, which provides theoretical guidance for the subsequent blasting excavation.