【摘要】：在深孔臺(tái)階爆破近區(qū)利用Anderson模型進(jìn)行波形疊加過程中,為了消除群孔脈沖序列及沖激響應(yīng)存在的偏差,提出了預(yù)測(cè)振動(dòng)效應(yīng)的修正方法。按照不同間隔時(shí)間構(gòu)建多種群孔脈沖序列,與沖激響應(yīng)遍歷進(jìn)行卷積運(yùn)算后,找出與實(shí)測(cè)波形最吻合的一組作為最優(yōu)置信水平下的群孔脈沖序列;同時(shí),基于主頻衰減規(guī)律,以各炮孔至測(cè)點(diǎn)距離與基孔距離的接近程度作為確定沖激響應(yīng)的方法。將其植入Matlab編制的預(yù)測(cè)程序?qū)δ炒伪普駝?dòng)效應(yīng)進(jìn)行預(yù)測(cè)。結(jié)果表明,修正后預(yù)測(cè)波形與實(shí)測(cè)波形的相似度提升顯著,振速預(yù)測(cè)偏差由83%~130%下降到0%~39%,預(yù)測(cè)精度得到明顯改善。
[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.
【作者單位】： 華北科技學(xué)院安全工程學(xué)院;中國礦業(yè)大學(xué)(北京)力學(xué)與建筑工程學(xué)院;北京科技大學(xué)土木與資源工程學(xué)院;
【分類號(hào)】：TB41

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