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花岗岩介质中地下爆炸震源函数研究
引用本文:周钟, 王肖钧, 肖卫国, 赵凯. 花岗岩介质中地下爆炸震源函数研究[J]. 爆炸与冲击, 2007, 27(1): 18-25. doi: 10.11883/1001-1455(2007)01-0018-08
作者姓名:周钟  王肖钧  肖卫国  赵凯
作者单位:中国科学技术大学力学和机械工程系,安徽 合肥 230026
摘    要:结合地震反演方法和数值计算方法,研究了地下爆炸震源函数的特征以及介质特性对震源函数的影响。从水饱和花岗岩地下爆炸波数值模拟计算出发,重点分析了含水量对震源函数特性的影响。结果表明,含水量会提高地下爆炸的耦合强度,对于震源函数的稳态值,干岩要比水饱和岩石低,且稳态值随含水量的增大而增大;拐角频率随含水量的增大而降低;在水饱和花岗岩中,震源函数的高频衰减指数高于f-2;而过冲特性并不明显。

关 键 词:爆炸力学   震源函数   理论反演   地下爆炸   花岗岩   数值计算
文章编号:1001-1455(2007)01-0018-08
修稿时间:2005-10-10

Study on the main characteristics of underground explosion seismic source function in granite
ZHOU Zhong, WANG Xiao-jun, XIAO Wei-guo, ZHAO Kai. Study on the main characteristics of underground explosion seismic source function in granite[J]. Explosion And Shock Waves, 2007, 27(1): 18-25. doi: 10.11883/1001-1455(2007)01-0018-08
Authors:ZHOU Zhong  WANG Xiao-jun  XIAO Wei-guo  ZHAO Kai
Affiliation:Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
Abstract:The main characteristics of seismic source function in underground explosion are studied by seismological method and numerical method. Especially, the influence of water content on seismic source function is studied, and it reveals that the coupling energy of underground explosion increases with the increase of the water content. The steady-state value of RDP in water-saturated granite is higher than that in dry granite, and correspondingly, the value increases with the increase of water content. However, the corner frequency of RVP’s amplitude spectrum of water-saturated granite is lower than that in dry granite, and its value decreases with the increase of water content. The asymptotic behavior of RVP at high frequencies, or roll-off, is thought to be steeper than f-2. The overshoot of RDP at the far-field is not obvious.
Keywords:mechanics of explosion  seismic source function  seismological method  underground explosion  granite  numerical simulation
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