【摘要】 为分析露天矿频繁爆破致使框架建筑出现裂缝的安全性问题,开展基于现场监测的试验研究。采用爆破测振仪和8通道测振系统,测定露天矿爆破地震波参数和框架主体、危险墙体的固有频率及其在露天矿爆破中的振动响应。研究结果表明:填充墙体的固有频率高于建筑主体的固有频率,且接近于爆破地震波的输入频率;填充墙体的振动速度高于建筑主体的振动速度;同爆破地震波传播方向垂直的填充墙是建筑中的危险结构;框架建筑主体和填充墙固有频率的差异性导致沿墙体出现裂缝;爆破地震波的地表振动速度虽然满足《爆破安全规程》,但频繁的露天矿爆破对框架建筑安全的威胁不容忽视。更多还原

【Abstract】 To analyse the safety of frame structural building impacted by open-pit blasting seismic wave,field monitoring tests were carried out.Parameters of blasting seismic wave,and natural frequency and vibration response of the building were measured.The research results show that the natural frequency of the filler wall is higher than the building’s natural frequency and close to the input frequency of blasting seismic wave,that filler wall vibration velocity is higher than building vibration velocity,that the filler wall perpendicular to the blasting seismic wave is the most dangerous structure,that the difference of the natural frequency between filler wall and building leads to crack,and that although vibration velocity of blasting seismic wave meets the specified value of the Safety Specifications of Blasting Operation,the threat of it’s frequent impact should not be neglected.更多还原