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爆破震动衰减特性研究通常采用经典的萨道夫斯基公式实现。如何根据不同爆破条件合理选择公式中的场地系数K和衰减指数α是确定爆破控制参数的关键。实际工程分析中,通常采用可监测参数反演识别方法获取K和α值。以大连地铁2号线201标段接收井横通道爆破作业为背景,基于差异进化(DE)算法中缩放因子F和交叉概率Cr贡献值的合理选择,研究萨道夫斯基公式K和α的反演问题。首先,通过对算法中F和Cr不同取值对萨道夫斯基公式计算结果的影响分析,得到各向震速条件下收敛最小的F和Cr值;然后,根据F和Cr取值反演K和α参数。工程实践表明,基于DE算法反演识别得到的K和α值代入萨道夫斯基公式,计算得到的垂向、纬向、经向速度及合速度与实测速度变化趋势一致,并处在合理误差范围之内。
The research on the characteristics of blasting vibration attenuation is usually achieved by the classic Sadovski formula. How to reasonably choose the site coefficient K and the attenuation index α in the formulas according to different blasting conditions is the key to determine the blasting control parameters. In actual engineering analysis, the K and α values are usually obtained by using the monitoring parameter inversion and identification method. Taking the cross-channel blasting operation of receiving well in Lot 201 of Dalian Metro Line 2 as the background, based on the reasonable choice of scale factor F and crossover probability Cr contribution in Difference Evolution (DE) algorithm, we study the inverse of Sadowitz’s formula K and α Play the problem. Firstly, the F and Cr values with the smallest convergence rate under all directions are obtained by analyzing the influence of the different values of F and Cr on the calculation results of the Sadovski formula. Then, based on the F and Cr values, the K And alpha parameters. The engineering practice shows that the K and α values obtained from the inversion and identification of DE algorithm are substituted into the Sadowssky formula, and the calculated trends of vertical, latitudinal and longitudinal velocities and co-velocities are consistent with the observed velocities and are within reasonable error Within the scope.