基于小波（包）和HHT的爆破震动信号分析与应用
发布时间：2019-03-13 21:30
【摘要】：信号监测和分析是爆破震动领域的重点研究内容。为了解决某矿爆破工艺存在的问题,在切割槽爆破和采场崩矿爆破实测数据的基础上,借助信号小波(包)和HHT技术,进行了爆破震动信号去噪、微差爆破延时识别、爆破震动波形预测和爆破震动能量安全等相关研究。(1)对爆破震动原始信号进行了小波阈值法和EMD低通法去噪研究,并分析了其缺陷性。综合EMD方法分解、重构方便和小波阈值法灵活、可调的优点,提出一种高效的爆破震动信号去噪方法—EMD-小波阈值法。(2)依据雷管引爆炸药激发能量密度突变原理,对切割槽微差爆破延时时间进行识别,获知了雷管的性能,为矿山爆破设计提供了依据。(3)将小波包技术引入,分析了分频段爆破震动波的传播规律,在此基础上,选定具有场地信息的震动波作为基函数,构建了一种全时-程的爆破震动波形预测模型。(4)从能量的角度出发,借鉴物理学“共振”原理和EEMD分解方法,对爆破震动加载下地表建筑物的稳定性进行了研究,初步建立了EEMD折合能量评判模型。并将该模型应用于工程实践,初步推断得出,折合能量16时,该矿地表建(构)筑物有破坏危险。nE
[Abstract]:Signal monitoring and analysis is the key research content in the field of blasting vibration. In order to solve the problems existing in blasting technology of a certain mine, on the basis of the measured data of cutting slot blasting and stope caving blasting, with the help of signal wavelet (packet) and HHT technology, the blasting vibration signal was de-noised and the delay of millisecond blasting was identified. The prediction of blasting vibration waveform and the safety of blasting vibration energy are studied. (1) the wavelet threshold method and EMD low-pass method are used to de-noising the original signal of blasting vibration, and its defect is analyzed. Based on the advantages of EMD decomposition, convenient reconstruction and flexible and adjustable wavelet threshold method, an efficient de-noising method of blasting vibration signal-EMD- wavelet threshold method is proposed. (2) according to the sudden change principle of energy density of detonator detonating explosive, an efficient method of de-noising blasting vibration signal-EMD- wavelet threshold method is proposed. The delay time of cutting slot millisecond blasting is identified, and the performance of detonator is obtained, which provides the basis for mine blasting design. (3) the wavelet packet technology is introduced to analyze the propagation law of blasting vibration wave in the frequency division section, and on this basis, the blasting vibration wave propagation law is analyzed. The vibration wave with site information is selected as the basic function, and a full-time-range prediction model of blasting vibration waveform is constructed. (4) from the point of view of energy, the "resonance" principle of physics and the EEMD decomposition method are used for reference. In this paper, the stability of surface buildings under blasting vibration loading is studied, and the EEMD reduction energy evaluation model is established. The model is applied to the engineering practice, and the preliminary inference is that the surface building (structure) of the mine is in danger of damage when the conversion energy is 16:00. NE
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD235.1
本文编号：2439727
[Abstract]:Signal monitoring and analysis is the key research content in the field of blasting vibration. In order to solve the problems existing in blasting technology of a certain mine, on the basis of the measured data of cutting slot blasting and stope caving blasting, with the help of signal wavelet (packet) and HHT technology, the blasting vibration signal was de-noised and the delay of millisecond blasting was identified. The prediction of blasting vibration waveform and the safety of blasting vibration energy are studied. (1) the wavelet threshold method and EMD low-pass method are used to de-noising the original signal of blasting vibration, and its defect is analyzed. Based on the advantages of EMD decomposition, convenient reconstruction and flexible and adjustable wavelet threshold method, an efficient de-noising method of blasting vibration signal-EMD- wavelet threshold method is proposed. (2) according to the sudden change principle of energy density of detonator detonating explosive, an efficient method of de-noising blasting vibration signal-EMD- wavelet threshold method is proposed. The delay time of cutting slot millisecond blasting is identified, and the performance of detonator is obtained, which provides the basis for mine blasting design. (3) the wavelet packet technology is introduced to analyze the propagation law of blasting vibration wave in the frequency division section, and on this basis, the blasting vibration wave propagation law is analyzed. The vibration wave with site information is selected as the basic function, and a full-time-range prediction model of blasting vibration waveform is constructed. (4) from the point of view of energy, the "resonance" principle of physics and the EEMD decomposition method are used for reference. In this paper, the stability of surface buildings under blasting vibration loading is studied, and the EEMD reduction energy evaluation model is established. The model is applied to the engineering practice, and the preliminary inference is that the surface building (structure) of the mine is in danger of damage when the conversion energy is 16:00. NE
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD235.1
【引证文献】
相关会议论文 前1条
1 蔡立艮;卢红标;周春华;史长根;;小波变换模极大值法在微差爆破中的应用[A];第一届全国工程安全与防护学术会议论文集[C];2008年
，本文编号：2439727
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