爆破地震波的能量衰减规律研究

介绍爆破过程中能量的释放

第29卷 增1

岩石力学与工程学报 Vol.29 Supp.1

2010年5月 Chinese Journal of Rock Mechanics and Engineering May，2010

爆破地震波的能量衰减规律研究

李洪涛1，卢文波2，舒大强2，杨兴国1，易长平3

(1. 四川大学 水利水电学院，四川 成都 610065；2. 武汉大学 水资源与水电工程科学国家重点实验室，湖北 武汉 430072；

3. 武汉理工大学 资源与环境工程学院，湖北 武汉 430070)

摘要：爆破地震对建筑物的影响实质上是一种能量的传递与转化过程，从爆破振动控制的方面考虑，了解爆破地震波传播过程中的衰减特性，才能对建筑物受影响程度做出必要而又相对准确的估计。基于地震学相关理论，研究爆破地震波的能量衰减规律，表明峰值能量随距离的衰减系数同振速衰减系数呈2倍关系，对于同一场次的爆破而言，爆破地震的总能量同峰值振速的平方近似成正比例。针对实例工程的分析结果印证理论推导的正确性。实例分析同时表明，爆破地震的能量衰减是以米计的，这一点有别于天然地震。在运用天然地震方法处理爆破地震时应该注意到这一区别。

关键词：爆炸力学；爆破地震；能量；衰减规律；地震学

中图分类号：O 38 文献标识码：A 文章编号：1000–6915(2010)增1–3364–06

STUDY OF ENERGY ATTENUATION LAW OF BLAST-INDUCED

SEISMIC WAVE

LI Hongtao1，LU Wenbo2，SHU Daqiang2，YANG Xingguo1，YI Changping3

(1. School of Water Resource and Hydropower，Sichuan University，Chengdu，Sichuan610065，China；

2. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei430072，China；

3. School of Resources and Environmental Engineering，Wuhan University of Technology，Wuhan，Hubei430070，China)

Abstract：The effect of blast-induced seismic on buildings can be considered as a transferred and transformed process of the energy. Considering the command of blasting vibration control，it is necessary to know the attenuation law of blast-induced seismic，in order to make relatively accurate estimate for the extent of the buildings affected by blasting vibration. Based on seismology theory，energy attenuation law of blast-induced seismic wave is studied. It turns out that the attenuation coefficient for the peak energy is of twice that for the peak particle velocity(PPV). During a same blasting，the total energy of blast-induced seismic is of direct proportion with square of the peak particle velocity. Example analysis shows that theoretical derivation is correct，and energy of blast-induced seismic wave decays very quickly with the increase of the distance. Attenuation charismatic characteristics of blast-induced seismic are different from the earthquake，so these difference must be paid special attention when the methods usually applied in earthquake engineering are employed to study the dynamic response characteristic of blast-induced seismic.

Key words：explosion mechanics；blast-induced seismic；energy；attenuation law；seismology

收稿日期：2008–11–03；修回日期：2009–05–04

基金项目：教育部博士点新教师基金项目(200806101039)；四川省科技支撑计划项目(2008SZ0232)；四川大学青年科学基金项目(校青2008042) 作者简介：李洪涛(1979–)，男，2007于武汉大学水工结构工程专业获博士学位，现任讲师，主要从事工程爆破及岩石动力学方面的研究工作。E-mail：htl@