摘要
利用数值模拟对预裂缝的减振效果进行了量化分析,掌握了预裂缝参数对地震波传播的影响规律,结果显示,在一定范围内(即在r≤r0,r0为定值),减振效果随着预裂缝缝宽的增加而增加,当缝宽r≥r0时,缝宽对预裂缝减振效果的影响减弱。借助M atlab拟合出了预裂缝的减振效果与预裂缝的长度、深度以及爆源距离的关系公式,对生产实践中减震效果的预测预报具有一定的指导作用。
The effect of pre-splitting crack parameters on damping vibration is analyzed quantificationally by numerical simulation,the influence rules of pre-splitting crack parameters on propagation of blasting seismic wave are found.The results show that the effect of damping vibration increases with the increase of pre-splitting crack width in a scope(namely r≤r0,r0 is a constant),when r is bigger than r0,there is little influence on damping vibration along with the increase of width of pre-splitting crack.The relation expressions between the effect of pre-splitting crack on damping vibration and the length,depth of pre-splitting crack,distance between blasting source and pre-splitting crack are fitted by the Matlab software,which can be a reference for forecasting the effect of damping vibration in practice.
出处
《爆破》
CSCD
2007年第2期25-27,35,共4页
Blasting
关键词
预裂爆破
预裂缝
爆破地震波
隔振减振
数值模拟
pre-splitting blasting
pre-splitting crack
blasting seismic wave
vibration isolation and damping
numerical simulation
