爆破振动持时分析及微差爆破延期时间优选

发布时间：2018-05-12 20:53

本文选题：爆炸力学 + 振动持续时间　；参考：《爆炸与冲击》2016年05期

【摘要】：爆破振动持续时间以及微差爆破延期时间分别是爆破振动危害客观评价与主动控制的重要指标,对振动持时影响因素和延期时间优选方法进行深入探究极为必要。结合量纲分析理论,探讨了爆破振动持时影响因素,推导出爆破振动持时预测公式,该公式线性相关性达到89.7%;基于地震波线性叠加原理,通过MATLAB 7.0编程,计算得到毫秒微差爆破不同爆心距处合理延时区间。结果表明,爆破振动信号能量与振动持续时间相关性高,在振动持时预测公式中引入信号能量,可提高预测精度;振动持续时间与比例速度负相关,与比例药量正相关;合理孔间延期时间往往不是某一具体值,而是一个或多个时间区间;不同爆心距处合理延期时间值不同。工程应用表明,给出的爆破振动持时预测公式与微差爆破延时优选方法切实可行。
[Abstract]:The duration of blasting vibration and the delay time of millisecond blasting are important indexes for objective evaluation and active control of blasting vibration. It is very necessary to study the influencing factors of vibration duration and the optimum selection method of delay time. Combined with dimensional analysis theory, the influencing factors of blasting vibration duration are discussed, and the prediction formula of blasting vibration duration is deduced. The linear correlation of the formula is up to 89.7. Based on the principle of seismic wave linear superposition, this formula is programmed by MATLAB 7.0. The reasonable delay interval of millisecond blasting with different center distance is obtained. The results show that the signal energy of blasting vibration is highly correlated with the duration of vibration, the prediction accuracy can be improved by introducing signal energy into the prediction formula of vibration duration, the vibration duration is negatively correlated with the proportional velocity, and is positively correlated with the proportional charge. The reasonable inter-hole delay time is usually not a specific value, but one or more time intervals. The engineering application shows that the formula for predicting the duration of blasting vibration and the optimum method for delay selection of millisecond blasting are feasible.
【作者单位】：武汉科技大学理学院;中铁港航-武科大爆破技术研究中心;湖北皓f爆破工程有限公司;
【基金】：国家自然科学基金项目(51574184) 湖北省教育厅科学技术研究项目(Q20161101) 武汉科技大学青年科技骨干培育计划项目(2016xz018)
【分类号】：O381

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