黑岱沟露天煤矿抛掷爆破振动规律研究  

Study on blasting vibration rule of cast blasting in Heidaigou Open-pit Coal Mine

作　　者：唐晓骞[1] TANG Xiaoqian(Heidaigou Open-pit Coal Mine,Shenhua Group Zhunge'er Energy Co.,Ltd.,Ordos 010300,China)

机构地区：[1]神华准格尔能源有限责任公司黑岱沟露天煤矿,内蒙古准格尔010300

出　　处：《露天采矿技术》2021年第1期5-8,12,共5页Opencast Mining Technology

摘　　要：为提供露天矿抛掷爆破设计和安全校核依据,以黑岱沟露天矿第二采区为工程背景,通过抛掷爆区的振动监测和回归分析,分别对露天矿开采过程中爆破振动波的峰值振速和主振频率衰减规律进行了研究。结果表明:对于同一条测线,水平径向x方向的振速比水平切向y方向与垂直方向z方向的振速大,且预裂爆破带后的振动强度明显减小;主振频率随着爆心距的增大,同样有衰减的趋势,且黑岱沟露天煤矿南区爆破振动主频在3~30 Hz。In order to provide the basis for the design and safety check of blasting in open-pit mines,taking the second mining area of Heidaigou Open-pit Mine as the engineering background,through the vibration monitoring and regression analysis of the throwing blasting area,the article studies peak vibration velocity and the main vibration frequency attenuation law of the blasting vibration wave in the open-pit mining process respectively.The results show that for the same survey line,the vibration velocity in the horizontal radial x direction is greater than that in the horizontal tangential y direction and the vertical z direction,and the vibration intensity after the pre-splitting blasting zone is significantly reduced;In terms of the main vibration frequency,as the blast center distance increases,the main vibration frequency also has a tendency to attenuate,and the main frequency of blasting vibration in the southern part of Heidaigou Open-pit Coal Mine is between 3 Hz to 30 Hz.

关 键 词：爆破振动 振动测试 地震波 抛掷爆破 主振频率 

分 类 号：TD824[矿业工程—煤矿开采]