摘要
为降低某露天铁矿爆破振动对周边环境的影响,开展现场试验,对比分析110和170mm成品乳化炸药不耦合装药结构下的爆破振动规律,优选炮孔直径与成品乳化炸药搭配方案。结果表明:空气不耦合装药结构可在一定作用范围内对爆炸冲击波作用区能量进行调整,削弱冲击波峰值应力,进而降低地震波作用区应力峰值及影响时间;随着爆心距逐渐增大,各测点的振动速度皆表现为近区振动速度衰减显著、远区衰减趋缓的走势。110mm成品乳化炸药不耦合装药方案下的爆破振动速度更低,平均降幅达到25.86%。
In order to reduce the influence of blasting vibration on the surrounding environment of an open-pit iron mine,a field test was carried out to compare and analyze the blasting vibration law of 110 mm and 170 mm finished emulsion explosives uncoupled charge structure,and the matching scheme of blast hole diameter and finished emulsion explosives was optimized.The results show that the air-uncoupled charge structure can adjust the energy of the explosion shock wave action zone within a certain range of action,weaken the peak stress of the shock wave,and then reduce the peak stress and influence time of the seismic wave action zone.With the increase of the distance from the explosion center,the vibration velocity of each measuring point shows a trend of significant attenuation of vibration velocity in the near area and slow attenuation in the far area.The blasting vibration velocity under the uncoupled charging scheme of 110 mm finished emulsion explosive is lower,with an average decrease of 25.86%.
作者
谭义明
谢亮波
李二宝
顾红建
TAN Yiming;XIE Liangbo;LI Erbao;GU Hongjian(Nanshan Mining Co.,Ltd.,Anhui Masteel Mining Resources Group;State Key Laboratory of Safety and Health for Metal Mines;Maanshan Institute of Mining Research Blasting Engineering Co.,Ltd.)
出处
《现代矿业》
CAS
2024年第4期88-91,共4页
Modern Mining
关键词
露天矿山
爆破振动
不耦合装药结构
open-pit mine
blasting vibration
uncoupled charge structure
