预裂缝参数对减震效果影响的数值模拟研究  

Numerical simulation in research of pre-splitting crack parameters on vibration reduction effect

作　　者：巫雨田[1] 夏岸雄[1] 秦忠虎[1] 房泽法[2] 

机构地区：[1]紫金矿业集团股份有限公司,福建上杭364200 [2]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《化工矿物与加工》2016年第1期27-30,35,共5页Industrial Minerals & Processing

摘　　要：为了研究预裂缝参数预裂爆破减震效果的影响,运用ANSYS/LS-DYNA软件对不同深度、不同长度预裂缝的预裂爆破进行数值模拟,分析减震率随预裂缝深度、长度变化的规律,得出：预裂缝的深度和长度达到一定值后,继续增加预裂缝的深度和长度对减震效果的提升并不明显,预裂缝深取0.75~1.5倍炮孔深度、预裂半长（预裂缝超出爆破界限）取0.75~1.13倍炮孔深度时其减震效果明显且经济上合理。The numerical simulations of bench blasting at dif- ferent depths and lengths of pre-splitting cracks were carried out using ANSYS/LS-DYNA to analyze the impact of presplitting crack parameters on vibration reduction effect. Through the anal- ysis, it was found that after the depth and length of presplitting crack reached specific values, the improvement of the vibration reduction effect would not be obvious. When the depth of pres- plitting crack was 0.75-1.5 times of borehole depth and half of the presplitting crack length （length beyond blasting range） was 0. 75-1.13 time of borehole depth, the vibration-reduction effect would be notable and economical,

关 键 词：预裂爆破 预裂缝参数 数值模拟 减震效果 

分 类 号：O328[理学—一般力学与力学基础] TD235[理学—力学]