李氏指数在爆破振动信号奇异性分析中的应用  

Singularity analysis of blasting vibration signals based on wavelet transform moulus maxima

作　　者：周春华[1] 龙源[1] 晏俊伟[1] 蔡立艮[1] 肖燕妮[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2006年第5期471-475,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10372117)

摘　　要：为更深入地研究爆破振动信号中携带的地质特征等奇异性信息,进行了完整场地、减震沟和预裂缝条件下的爆破振动试验,并在此基础上,运用小波变换模极大值方法对试验数据进行分析处理。分析表明:该爆破试验场地上的爆破振动信号在lb a为4.5~6.0的范围内具有稳定的李氏指数,并且该指数能够很好地刻画爆破地震波携带的场地特征等奇异性信息。L ipsch itz指数曲线图较为直观地反映了爆破场地的差异,同时得到了3种条件下的李氏指数分别为-3.69^-1.88-、3.54^-1.71-、4.14^-1.58,验证了减震沟比预裂缝有更好的减震效果。In order to study the singularity information signal of blasting vibration signal, some experiments were done in the rude field, damping ditch field and split field. WTMM（wavelet tronsform moulus maxima） was used to process the experiment data with the following conclusions. First, blasting vibration signal has steady Lipschitz exponent when lb a is between 4.5 and 6.0,and the Lipschitz exponent can describe the charater of blasting vibration field and other singularity information preferably. Second, the curve of Lipschitz exponent reflects the difference among the field. At the same time, the Lipschitz exponent are-3.69--1.88,--3.54--1.71,--4.14--1.58 in turn and the damping effect of damping ditch is better than the split.

关 键 词：爆破振动信号 李氏指数 奇异性 减震效果 

分 类 号：TD235.1[矿业工程—矿井建设]