洋山港水下多孔爆破陆地和水底震动实地测试与分析  

Field measurement and signal analysis of land and water bottom vibrations induced by underwater multi-hole blasting at Yangshan Port

作　　者：陈江海[1,2] 顾文彬[1] 王振雄[1] 李宁[3] 刘建青[1] 徐景林[1] 

机构地区：[1]解放军理工大学野战工程学院 [2]解放军65307部队 [3]解放军理工大学训练部

出　　处：《振动与冲击》2016年第24期207-212,220,共7页Journal of Vibration and Shock

基　　金：总后基建营房部项目(KYGYZXJK0914)

摘　　要：为研究水下多孔爆破引起的水底和陆地震动特点,依托洋山港治理工程进行了水下多孔爆破水底和陆地震动测试试验并获得有效震动信号,利用频序小波包分解算法对震动信号进行频带分解和能量分布的对比分析。测试和分析结果表明,相比水底震动,陆地震动持续时间延长,幅值衰减很大,频带更窄,主频更低,并且含有明显的次高频带;三个方向震动能量衰减都在90%以上,而以上下垂直向能量衰减最大,水平垂直于岸的南北向衰减最小;低频带小波包能量衰减最小,高频带小波包能量衰减最大,并且水平平行于岸的东西向和水平垂直于岸的南北向小波包能量衰减呈现振荡特征。To study the characteristics of water bottom and land ground vibrations induced by underwater multi-hole drilling blasting,a field measurement test was conducted at Yangshan Port to get actual vibration signals. The energy distribution of vibration signals in different frequency bands was analyzed by using the frequency order wavelet packet algorithm. Test and analysis results show that compared to water bottom vibration,land ground vibration attenuates greatly on amplitude and lasts longer on time,has narrower frequency band,lower dominant frequency,and higher sub-band frequency vibration. From water bottom to land ground, the vibration energy attenuates more than 90% in three directions,with maximum in vertical direction and minimum in north-south direction. The wavelet packets energy attenuates less in low frequency band than in high frequency band and exhibits oscillatory attenuation characteristics in east-west and north-south direction.

关 键 词：水下多孔爆破 陆地震动 水底震动 小波包分析 

分 类 号：TD235.1[矿业工程—矿井建设]