摘要
应用分形理论的盒维数方法,建立双尺度矩形盒维数模型,对井下深孔爆破地表振动实测信号进行分析。介绍了爆破振动信号盒维数D和拟合参数b的计算方法,并获得所测各点的T(切向)、V(垂向)、L(径向)三个方向的爆破振动信号的盒维数D和拟合参数b;结合爆破振动信号的频谱图,对不同方向爆破振动信号的分形特征进行了探讨。初步研究表明:不同方向的爆破振动信号都表现出盒维数D值越大,信号高频成分越多,反之则越少的特征;爆破药量对拟合参数b值大小的影响呈类似规律。
Using the box dimension method of fractal theory, the double-scaled rectangle box dimension mode was built. Through analyzing the surface vibration of deep hole blasting in the shafts, and introducing the calculation method about box dimension and fitting b-values of blasting vibration signals, the box dimension and fitting bvalues about T, V, L of blasting vibration signals in three directions hove been ob- tained. Combining with the blasting seismic wave spectrum, fractal characteristics of blasting vibration signals in directions were discussed. The results have shown that the greater box dimension are, the more the high frequency components of signal have and the blasting quantity has the similar influence on b-values of blasting vibration in various directions.
出处
《工程爆破》
北大核心
2014年第4期6-10,共5页
Engineering Blasting
基金
江西省教育厅科技计划项目(GJJ12336)
江西省研究生创新专项资金项目(YC2013-S185)
校级研究生创新专项资金项目(YC2012-X05)
关键词
爆破振动信号
分形理论
盒维数
不同方向
频谱
Blasting vibration signals
Fractal theory
Box dimension
Di{ferent directions
Spectrum
