不同爆源形式的爆破地震能量分布特征  

Study on Energy Distribution Characteristics of Seismic Waves Induced by Different Forms of Blasting Resource

作　　者：李洪涛[1] 杨兴国[1] 舒大强[2] 卢文波[2] 高星吉[1] 

机构地区：[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

出　　处：《四川大学学报（工程科学版）》2010年第1期30-34,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金重点资助项目(50539100);教育部博士点新教师基金(200806101039);四川省科技支撑计划(2008SZ0232);四川大学青年科学基金(校青2008042)

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,这种传递与转化的过程受到爆破地震波能量分布特征的影响。利用基于功率谱的爆破地震能量分析方法,借助大量工程实测数据,针对爆源形式对爆破地震能量分布特征的影响进行了分析,分析结果表明:对于4类钻孔爆破诱发的地震,能量随频率分布比较分散,0～10Hz的低频段能量比例非常少;不同爆源形式的爆破地震能量分布特征存在差别,随着孔径、孔深的增大,爆破地震主振能量频带趋于集中,也更倾向低频方向;地下工程爆破地震小于40Hz的能量比例非常小。不同爆源形式爆破地震能量分布特征上的这种差别,对于控制爆破中钻爆方式的选取具有很好的指导意义。The effect of blast-induced seismic waves on buildings can be considered as a transferred and transformed process of the energy, which relates to the energy distribution characteristic of blasting vibration. An energy analysis method for blasting vibration signals based on power spectrum was put forward. Based on a large number of measurement data, the energy distribution characteristics of seismic waves induced by different forms of blasting resource were studied. The result shows that for blasting vibration induced by four kinds of drilling-and-blasting, the energy distribution with frequency is scattered. The seismic energy of low-frequency from 0 Hz to 10 Hz is very little. The energy distribution characteristics vary with the different types of drilling-and-blasting. As diameter and depth of the blasting hole increases, the frequency band of energy distribution becomes more focus and has the trend of moving to the lower frequency, and for underground blasting, the seismic energy below 40 Hz is very little. The energy distribution characteristic of seismic waves induced by different forms of blasting resource can have guiding role for choosing the appropriate type of drilling-and-blasting when the effect of blasting vibration needs to be controlled.

关 键 词：爆破地震 能量分布 功率谱 钻孔爆破 控制爆破 

分 类 号：TD235.1[矿业工程—矿井建设]