露天煤矿爆破振动速度计算公式研究

Study on calculation formula of blasting vibration velocity in open pit coal mine

为研究适用于露天煤矿爆破振动速度的计算公式,基于露天煤矿爆破的现场监测数据,通过回归分析对比了传统萨道夫斯基公式与考虑高程后改进公式的相对误差,并采用量纲分析法推导出适用于计算露天煤矿爆破振动速度的公式.基于量纲分析法的露天煤矿爆破振动速度计算公式,可表述露天煤矿爆破振动速度受高程差影响的缩放效应,当高程差为0时公式退化为萨道夫斯基公式;其计算误差低于传统萨道夫斯基公式误差和考虑高程的萨道夫斯基公式误差.研究结论对露天煤矿的爆破和爆破安全评价具有一定意义.

In order to study the calculation formula of blasting vibration velocity in open pit coal mines,blasting data of open pit coal mines are monitored.The relative error of Sadovsky formula and the improved formula considering elevation are analyzed by regression analysis.The formula suitable for calculating blasting vibration velocity of open pit coal mine is proposed based on dimensional analysis method.The calculating formula based on dimensional analysis can express the amplification and reduction effects of blasting vibration velocity affected by elevation difference in open pit coal mine.While the elevation difference is zero,the calculation formula degenerates into Sadovsky formula.The calculation error of blasting vibration velocity formula based on dimensional analysis is lower than that of Sadovsky formula and improved Sadovsky formula considering elevation,which is a great of significance to the blasting and blasting safety evaluation in open pit coal mines.