露天采场台阶爆破萨道夫斯基公式的线性回归分析

Linear Regression Analysis on Sadovsky Formula for Open-pit Bench Blasting

随着爆破器材的不断发展,尤其高精度导爆管雷管和电子雷管的普及,露天采场台阶爆破在进行萨道夫斯基公式线性回归分析,对于测振点距离爆破区域较近而无法忽略炮孔散布位置时,在选择最大一段起爆药量和爆源至测振点距离上定义模糊。针对逐孔爆破近距离爆破测振,采用比例距离,最大一段起爆药量选取≤8 ms的总装药量或距离该测振点最近炮孔的药量,爆源至测振点距离选取最大一段起爆药量炮孔范围的中心距测振点的三维距离或距离该测振点最近炮孔的三维距离,通过群孔比例距离和单孔比例距离两者数值对比,选取比例距离较小者进行线性回归。结果表明:采用该种方法,对于同一方向或邻近方向的测振点数值,经过降噪处理后,能相对较准确地进行线性回归。

With the continuous development of blasting equipment,the popularization of high-precision detonator detonators and electronic detonators have been widely used in open-pit bench blasting.However,the definition is vague in the selection of the maximum amount of initiating charge and the distance from the detonation source to the vibration measurement point for the linear regression analysis of the Sadovsky formula when the vibration measurement point is close to the blasting area,and the dispersion position of the blast hole cannot be ignored.A proportional distance was used to measure close-range blasting vibrations by hole blasting.The total charge with a delay interval smaller than 8 ms or the charge quantity nearest to the vibration measurement point was selected as the maximum blasting charge in a section.The distance between the detonation source and the vibration measurement point was selected as the three-dimensional distance between the center of the hole range of the maximum blasting charge and the vibration measurement point or the three-dimensional distance between the hole and the nearest vibration measurement point.The one with a smaller proportional distance was selected for linear regression by comparing the group proportional and single proportional distances.The results show that it has relatively accurate linear regression using this method for the same direction or near the direction of the vibration point value after the noise reduction process.