台阶单孔爆破振动预测模型研究  

A Vibration Prediction Model of Open Step Single Hole Blasting

作　　者：李胜林[1] 韩昊轩 李晨 李洪超 王樨尧 张坤麟 LI Shenglin;HAN Haoxuan;LI Chen;LI Hongchao;WANG Xiyao;ZHANG Kunlin(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Public Safety and Emergency Management,Kunming University of Technology,Kunming,Yunnan 650093,China;China Electric Power Construction Group East China Survey,Design and Research Institute Co.,Ltd.,Hangzhou,Zhejiang 310008,China;City College of Kunming University of Technology,Kunming,Yunnan 650051,China;Southwest China Municipal Engineering Design and Research Institute Co.,Ltd.,Chengdu,Sichuan 610036,China;Inner Mongolia Hanshi Mining Engineering Co.,Ltd.,Xilinhot,Inner Mongolia 026099,China)

机构地区：[1]中国矿业大学(北京)力学与土木工程学院,北京100083 [2]昆明理工大学公共安全与应急管理学院,云南昆明650093 [3]中国电建集团华东勘测设计研究院有限公司,浙江杭州310008 [4]昆明理工大学城市学院,云南昆明650051 [5]中国市政工程西南设计研究总院有限公司,四川成都610036 [6]内蒙古瀚石矿山工程有限公司,内蒙古锡林浩特026099

出　　处：《北京理工大学学报》2024年第10期1027-1039,共13页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(52364016,52164010,52064025,52164009);云南省重大科技专项计划项目(202102AG050024)。

摘　　要：爆破振动具有随机性,振动波的强度和频率具有非平稳性,为了构建能够真实反映爆破振动波形特性的台阶单孔爆破振动预测模型,通过调制白噪声的过程确定模型的频率函数,用角频率的时变性来描述振动波形频率的非平稳性;通过对强度包络函数的筛选,选取Gamma函数来描述爆破振动波形强度的非平稳性;用高通滤波处理提高了预测模型在低频段的模拟精度.以预测模型与现场实测波形的时程频率一致为约束条件,阻尼比与不规则指数呈线性关系,确定模型的频率参数(η,ξ,γ),以现场实测波形累计能量为约束条件,确定模型的强度参数(I0,α,β),模型输出波形的峰值振速、主频分别与现场实测波形特征的较好吻合,证明了所构建预测模型的正确性和有效性.To solve the non-stationary problems of vibration wave randomness,the intensity and frequency existed in blasting vibration,a step single hole blasting vibration prediction model was constructed to reflect truly the characteristics of blasting vibration waveforms.Firstly,a frequency function of the model was determined based on modulating white noise,describing the non-stationary frequency of the vibration waveform with time-varying nature of angular frequency.Then,screening the intensity envelope function,the Gamma function was selected to describe the non-stationary intensity of blasting vibration waveforms,improving the simulation accuracy of the prediction model with the high pass filtering process in the low frequency range.And then,taking the timehistory frequency consistency of the on-site measured waveform and the predicted model as restrict condition,and taking the linearly relation as the relationship of the damping ratio and the irregularity index,the frequency parameters(η,ξ,γ)of the model were designed.Based on the accumulated energy of on-site measured waveforms as a constraint condition,the strength parameters(I0,α,β)were determined.The results show that the peak vibration velocity and main frequency of the output waveform of the model can agreement better with the charac-teristics of the on-site measured waveform,verifying the correctness and effectiveness of the constructed predic-tion model.

关 键 词：单孔爆破 爆破振动 预测模型 GAMMA函数 调制白噪声 

分 类 号：TB41[一般工业技术]