| 不同方向爆破振动信号的分形特征 |
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| 作者单位： | ;1.江西理工大学江西省稀土资源高效利用重点实验室 |
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| 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。
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| 关 键 词： | 爆破振动信号 分形理论 盒维数 不同方向 频谱 |
FRACTAL CHARACTERISTICS OF DIFFERENT DIRECTIONAL BLASTING VIBRATION SIGNALS |
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| Affiliation: | ,Jiangxi Key Laboratory of High Efficient Utilization of Rare Earth Resources,Jiangxi University of Science and Technology |
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| Abstract: | 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 6-values of blasting vibration signals,the box dimension and fitting 6-values about T,V,L of blasting vibration signals in three directions have been obtained.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 6-values of blasting vibration in various directions. |
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| Keywords: | Blasting vibration signals Fractal theory Box dimension Different directions Spectrum |
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