复杂环境下爆破振动速度预测模型分析

为了预测及分析邕宁水利枢纽工程爆破振动的传播与衰减规律,进而控制爆破所带来的危害,减小负面影响,采用爆破振动测试仪在现场布置了4个监测点,对爆破振动速度进行实测。由于传统的萨道夫斯基模型预测地形变化较大的爆破振动速度的精确度较低,因此根据实测数据和前人改进的2种预测模型,通过回归分析,将以萨道夫斯基模型为主、考虑髙程和岩体累计损伤的爆破振动速度预测模型进行变换,得到现场实验条件下的3组回归公式。同时,比较分析了实测爆破振动峰值速度与不同预测模型得到的爆破振动峰值速度。结果表明:髙程及岩体损伤对爆破振动效应具有较大的影响,改进后的爆破振动速度预测模型的精确度较高,能较好地反映该区域爆破振动传播与衰减规律。

Analysis of blasting vibration velocity prediction model in complex environment

In order to predict and analyze the propagation and attenuation law of blasting vibration in Yong-Ning water conservancy and hydropower pivot project, and then control the harm caused by blasting and reduce the negative impact.Four monitoring points are arranged on the spot by using the blasting vibration tester to measure the blasting vibration speed. Because the accuracy of traditional Sadowski model in predicting blasting vibration velocity with great topographic change is low, based on the measured data, two forecasting models improved by predecessors and through regression analysis, the model of predicting blasting vibration velocity is transformed by taking Sadowski model as the main model and considering the cumulative loss of elevation and rock mass into account, three sets of regression formulas under field experiment conditions are obtained. At the same time, the measured peak velocity of blasting vibration and the peak velocity of blasting vibration obtained by different prediction models are compared and analyzed. It shows that the elevation and rock mass damage have great influence on the blasting vibration effect, and the improved prediction model of blasting vibration velocity has high accuracy, which can better reflect the propagation and attenuation law of blasting vibration in this area.