节点文献
地震测深中的地震波衰减
SEISMIC ATTENUATION AND EXPLOSION SPECTRA FOR DEEP SEISMIC SOUNDING IN THE STUDY OF THE CRUSTAL AND UPPER MANTLE STRUCTURE
【Author】 Sun Kezhong Teng Jiwen Yao Hong Cheng Lifang (Institute of Geophysics,Chinese Academy of Sciences)
【机构】 中国科学院地球物理研究所;
【摘要】 基于在河南、湖北、江苏、安徽等省和西藏自治区进行的人工地震测深工作,详细分析了不同爆炸方式(水中爆炸、井中组合爆炸、矿山和洞室爆炸),不同炸药量(1.2~500 t)和不同观测距离(5~500 km)的实测资料,讨论了爆炸方式与衰减的关系.结果表明,水中爆炸的弹性波转换系数最大,并以组合爆炸方式获得最佳的效果.本文提出地震测深中的地震波衰减遵循关系式:Vm=β(R/W1/3)-r.式中,Vm为地表运动最大速度,(R/W1/3)为折合距离,r为衰减系数(r=1.5~1.6).文中简要讨论了地壳厚度与地震波衰减的关系.
【Abstract】 We have analysed,in detail,seismic traces for the different shot points and receiver points and proposed different explosion spectra on the basis of explosion methods,such as underwater,cluster in the wells,blast and cave explosions,and observed seismic data in the distance of 5-250 km.The predominant frequency is 6,7,5,and 9 Hz for underwater,cluster in the wells,blast and cave explosions respectively.The attenuation of peak-value of ground maximum velocity with distance is represented by(R/W1/3)-1.5</sup>(R/W1/3)-1.6.We have simply analysed the relationship between the observable distance and charge as well.
- 【会议录名称】 中国科学院地球物理研究所论文摘要集(1985)
- 【会议时间】1989-12-01
- 【分类号】P315.31