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炸药震源的地震安全性野外实验研究
罗桂纯1,2, 胡平2, 王治国2, 王飞2
1.中国地震局地球物理研究所,北京市海淀区民族大学南路5号100081;2.北京市地震局,北京市海淀区苏州街28号100080
摘要:
选定一块场地,针对相同井深、不同药量的情况,进行炸药震源的地震安全性野外实验,用Etna数字强震动加速度仪记录每次爆破时房屋振动的加速度。在选定房屋结构的地基、窗台、屋顶等3个位置分别布设了仪器,记录结构响应的加速度波形。为了与《爆破安全规程》的参考标准对应,将加速度值转换成速度值,并对位于屋顶的结构响应速度峰值进行分析。通过对结构响应、安全距离、频率的研究,分析建筑物结构对每次爆破的响应,并对其安全性进行讨论。
关键词:  炸药震源 加速度 速度峰值 安全距离
DOI:
分类号:
基金项目:北京市地震局任务性科技专项(JZX-201205)资助
A field experiment study of seismic safety with explosive source
Luo Guichun1,2, Hu Ping2, Wang Zhiguo2, Wang Fei2
1.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2.Earthquake Administration of Beijing Municipality, Beijing 100080, China
Abstract:
There is a widespread concern over the study of seismic safety with explosive source as time goes on. As far as explosive source itself is concerned, the selection of charge size and well depth has the much effect on excitation energy and frequency. So in the view of the same well depth and different charge sizes, we selected a site for a field experiment to study the seismic safety with explosive source. Aecelerograms of every explosion were observed by acceleration meter. Measurements were conducted with the accelerometers that were laid on the basement, windowsill, and rooftop. Acceleration was transformed to velocity in order to correspond with the Safety Regulations for Blasting, and analysis was conducted to the measured data that was acquired from the rooftop. It presents the analysis of structural response, safe distance, vibration frequency in explosive source to study the structural response. We discussed the seismic safety and offered references, which can help direct field-seismic gathering, increase seismic safety and minimize economic expenditure.[著者文摘]
Key words:  Explosive source Acceleration Velocity peak Safe distance