孔内微差起爆降振技术在路堑开挖爆破中的应用  

Application of Vibration Reduction Technology by In-hole Millisecond delay Detonation in Cutting Excavation Blasting

作　　者：赵明生 池恩安[1,2] 魏兴 

机构地区：[1]贵州新联爆破工程有限公司,贵州贵阳550003 [2]贵州大学矿业学院,贵州贵阳550025

出　　处：《矿业研究与开发》2013年第2期118-120,共3页Mining Research and Development

基　　金：贵州科技计划项目(SY2010365)

摘　　要：针对某路堑开挖周边环境的特点,在爆破开挖过程中对爆破振动进行了实时监测。首先利用实测数据回归出了该地区的爆破地震波传播衰减规律,确定了常规生产爆破的安全距离为27m。然后在18～27m范围内常规爆破无法满足要求的情况下,提出了孔内微差与不耦合装药相结合的方案。施工结果表明,利用此方案可提高穿孔、装运效率,并能对爆破振动质点峰值速度进行有效的控制,达到了预期的效果。研究成果可为复杂环境下的爆破振动控制提供依据。In view of the characteristics of the ambient cir- cumstances,the real--time monitoring of blasting vibration was carried out in a cutting excavation. First, the attenuation rule of blasting seismic wave in this area was obtained by re gression analysis of measured data, and the safe distance of regular blasting is determined as 27 m. Then,in the case of regular blasting in the range of18~27 m from buildings do- ing not meet safety requirements,a solution of in--hole mil- lisecond delay detonation combining with decoupled charging was proposed. And the results of implementation showed that by using this method the desired effects were achieved, such as effectively controlling peak velocity of blasting vibra- tion, improving efficiency of drilling and shipment. The re- suits may provide a basis for blasting vibration control in complex environment.

关 键 词：路堑开挖 爆破振动 孔内微差起爆 

分 类 号：TD235.32[矿业工程—矿井建设]