Wang Qin, Tao Tie-Jun, Jia Jian, Tian Xing-Chao, Xie Cai-Jin
College of Civil Engineering, Guizhou University, Guiyang, 550025, China.
College of Mining, Guizhou University, Guiyang, 550025, China.
Heliyon. 2024 Jun 17;10(12):e33210. doi: 10.1016/j.heliyon.2024.e33210. eCollection 2024 Jun 30.
Blasting vibration's effect on ground vibration is essentially an energy transfer and transformation process (Hongtao et al., 2010) [1]. In engineering, the blasting vibration duration is often used as an objective index to evaluate the blasting vibration hazard. Thus, this study on the factors influencing blasting vibration duration is essential. In this study, the blasting vibration duration prediction formula uses frequency and energy as independent parameters, which are analysed using a statistical t probability distribution. With the blasting vibration duration prediction formula, the delay time taken for the structure to reach the resonance frequency is obtained by calculating the dominant frequency of the structure. The results indicate that the frequency and energy of the blasting vibration signal are highly correlated with the duration of blasting vibration, and their introduction as independent parameters in the prediction formula can better improve the prediction accuracy. The dominant frequency should not be neglected in blasting vibration safety evaluations, and the use of blasting vibration duration prediction to calculate the dominant frequency can better avoid the resonance phenomenon in the structure.
爆破振动对地面振动的影响本质上是一个能量传递和转化的过程（洪涛等，2010）[1]。在工程中，爆破振动持续时间常被用作评估爆破振动危害的一个客观指标。因此，对影响爆破振动持续时间的因素进行研究至关重要。在本研究中，爆破振动持续时间预测公式采用频率和能量作为独立参数，利用统计t概率分布对其进行分析。通过爆破振动持续时间预测公式，计算结构的主导频率，从而得到结构达到共振频率所需的延迟时间。结果表明，爆破振动信号的频率和能量与爆破振动持续时间高度相关，将它们作为独立参数引入预测公式能够更好地提高预测精度。在爆破振动安全评估中，主导频率不容忽视，利用爆破振动持续时间预测来计算主导频率能够更好地避免结构中的共振现象。
