不同耦合介质对预裂缝减振效果影响研究  

Influence of Different Coupling Medium on the Vibration-reduction Effect of Pre-split Crack

作　　者：张袁娟[1,2,3] 王公忠[1,2] 任少峰 李梅[5] 

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]河南工程学院煤矿灾害预防控制实验室河南省高校重点实验室培育基地,河南郑州451191 [3]河南理工大学安全科学与工程学院,河南焦作454000 [4]西南能矿集团股份有限公司,贵州贵阳550004 [5]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《矿冶工程》2015年第2期20-22,28,共4页Mining and Metallurgical Engineering

基　　金：河南工程学院博士基金(D2013022);河南省教育厅科学技术研究重点项目(14B440005);国家自然科学基金(51104111);郑州市科技攻关项目(141PPTGG375)

摘　　要：运用LS-DYNA建立了有限元模型,分别对预裂缝有水和无水2种露天矿台阶生产爆破进行了数值模拟,结果表明,距离爆源越近,无水预裂缝减振效果越好;预裂缝有水工况与无水工况峰值振速相差比例最高可达61%。通过露天矿现场爆破振动监测试验,验证了数值模拟得出规律的正确性,为现场预裂爆破和主爆区选取合理起爆时间差提供了理论依据。Based on the finite element model established with LS-DYNA, numerical simulation was conducted respectively for the vibration-reduction effect of pre-split crack with and without water in the blasting of open-pit bench. It is concluded that pre-split crack without water while being closer to the explosion source will have a better vibration- reduction effect, and the difference between the peak particle vibration velocity of pre-split crack for the work condition with and without water can be up to 61%. The monitoring data of blasting vibration on open-pit site verified the correction of the numerical simulation results, which can provide theoretical basis for selecting denotation time for pre- split blasting and the main blasting area.

关 键 词：预裂缝 爆破 数值模拟 LS-DYNA 减振效果 

分 类 号：TD235[矿业工程—矿井建设]