深孔台阶爆破近区利用Anderson模型预测振动效应的修正方法研究
发布时间：2018-10-10 20:06
【摘要】：在深孔台阶爆破近区利用Anderson模型进行波形叠加过程中,为了消除群孔脉冲序列及冲激响应存在的偏差,提出了预测振动效应的修正方法。按照不同间隔时间构建多种群孔脉冲序列,与冲激响应遍历进行卷积运算后,找出与实测波形最吻合的一组作为最优置信水平下的群孔脉冲序列;同时,基于主频衰减规律,以各炮孔至测点距离与基孔距离的接近程度作为确定冲激响应的方法。将其植入Matlab编制的预测程序对某次爆破振动效应进行预测。结果表明,修正后预测波形与实测波形的相似度提升显著,振速预测偏差由83%~130%下降到0%~39%,预测精度得到明显改善。
[Abstract]:In order to eliminate the deviation of impulse sequence and impulse response of hole group in the process of waveform superposition using Anderson model in the near area of deep hole bench blasting, a modified method for predicting vibration effect is proposed. After convolution operation with impulse response traversal, a group of group hole pulse sequences with the best confidence level is found out according to different interval time, and based on the main frequency attenuation rule, a group of group hole pulse sequences with the best confidence level is found. The distance from each hole to the measuring point and the distance between the base hole and the hole are taken as the method to determine the impulse response. The effect of blasting vibration was predicted by inserting it into the prediction program compiled by Matlab. The results show that the similarity between the predicted waveform and the measured waveform is significantly improved, the prediction deviation of vibration velocity is decreased from 83% to 0%, and the prediction accuracy is improved obviously.
【作者单位】： 华北科技学院安全工程学院;中国矿业大学(北京)力学与建筑工程学院;北京科技大学土木与资源工程学院;
【分类号】：TB41
本文编号：2263079
[Abstract]:In order to eliminate the deviation of impulse sequence and impulse response of hole group in the process of waveform superposition using Anderson model in the near area of deep hole bench blasting, a modified method for predicting vibration effect is proposed. After convolution operation with impulse response traversal, a group of group hole pulse sequences with the best confidence level is found out according to different interval time, and based on the main frequency attenuation rule, a group of group hole pulse sequences with the best confidence level is found. The distance from each hole to the measuring point and the distance between the base hole and the hole are taken as the method to determine the impulse response. The effect of blasting vibration was predicted by inserting it into the prediction program compiled by Matlab. The results show that the similarity between the predicted waveform and the measured waveform is significantly improved, the prediction deviation of vibration velocity is decreased from 83% to 0%, and the prediction accuracy is improved obviously.
【作者单位】： 华北科技学院安全工程学院;中国矿业大学(北京)力学与建筑工程学院;北京科技大学土木与资源工程学院;
【分类号】：TB41
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