银山矿业露天采场生产爆破振动测试分析

Vibration Testing and Research Analysis of Production Blasting in an Open-pit Mine

为研究露天开采过程中生产爆破振动波的衰减规律及其对临近边坡稳定性的影响,以银山露天矿爆破开采工程为背景,对露天采区进行爆破振动效应测试试验。试验结果表明:(1)根据测点与爆源距离、单段最大爆破炸药量、实际测得的振速,采用数理统计原理的最小二乘法进行线性回归分析,得到爆破地震波衰减参数K、α,其爆破振动质点振动速度衰减规律公式为:V=328.02×(3√Q/R)^1.809;(2)采区临近边坡爆破时,宜采用预裂爆破等控制爆破技术,减少单段最大爆破药量及爆破规模,以此降低爆破振动对边坡稳定性的影响。

In order to study the attenuation law of blasting vibration wave and its influence on the stability of adjacent slope in open pit mining,the blasting vibration effect in open pit mining area was tested on the basis of blasting mining engineering.The experimental results show that:(1)According to the distance between the measuring point and the source,the maximum explosive capacity of a single part and the actual measured vibration speed,the least square method of mathematical statistics is used for linear regression analysis.The attenuation seismic parameters K and A of blasting seismic wave and the attenuation law of blasting vibration quality and vibration speed are obtained as follows:V=328.02×(3√Q/R)^1.809;(2)When the mining area is near the slope blasting,the pre-splitting blasting and other controlled blasting techniques should be adopted to reduce the maximum explosive charge and blasting scale in a single section,so as to reduce the impact of blasting vibration on the stability of the slope.