台阶爆破下振速传播规律公式的应用和对比

Application and Contrast of Formulas of Vibration Velocity Propagation Law under Bench Blasting

台阶爆破下振动速度传播规律公式的选取一直是专家学者争议的焦点。笔者以某矿山爆破工程为依托,通过现场试验获取数据,结合最小二乘法基本原理,分别使用萨道夫斯基公式和长江科学院公式拟合峰值振速传播规律,并将二者进行对比,得出以下结论:峰值振动速度随爆心平距的增大而减小,随爆心垂距的减小而增大;单段最大药量为16 kg时,随着爆心垂距的降低,萨道夫斯基公中系数K减小,系数α减小,(316 R)α增大,(316 R)α增大的速度快于系数K减小的速度;爆心垂距不断变化时,长江科学院公式相比萨道夫斯基公式具有更好的兼容性。

Formula selection of vibration velocity propagation law under bench blasting has always been the focus of controversy among experts and scholars.Taking a mine blasting project as an example,acquiring data through field test,using respectively Sadov's formula and the formula putting forward by Yangtze River Scientific Research Institute,combining least square method,fitting the peak velocity propagation laws and comparing them,conclusions are drawn as follows:the peak vibration velocity decreases with the increase of horizontal distance of detonation center,and increases with the decrease of vertical distance of detonation center;as maximum explosive charge of each blasting is 16 kilograms,the coefficient K in Sadov's formula decreases,coefficientαdecreasing,(316 R)αincreasing,the speed of(316 R)αincreasing being bigger than the speed of coefficient K decreasing,with the decrease of vertical distance of detonation center;the formula of Yangtze River Scientific Research Institute is more compatible than Sadov's formula when the vertical distance of detonation center keeps changing.