相交裂隙对爆破效果影响的数值模拟研究  

Numerical simulation of influence of joint cracks on blasting effect

作　　者：张袁娟[1,2] 孙文标[1] 可杰 赵强 李星 

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]河南理工大学安全科学与工程学院,河南焦作454000 [3]郑州宇通集团有限公司,河南郑州450016 [4]北方爆破科技有限公司,北京100089

出　　处：《化工矿物与加工》2016年第7期52-54,共3页Industrial Minerals & Processing

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：为了研究节理裂隙在露天矿生产爆破中对爆破效果的影响,运用显式非线性动力分析有限元程序LS-DYNA建立有限元模型,分别对无裂隙、平行裂隙和爆源同侧相交节理裂隙的台阶爆破进行数值模拟,选取3个模型同位置单元,以数值模拟结果为基础,通过应力波传播规律结合最大主应力分析,得出无裂隙工况最大主应力最大,平行裂隙工况次之,相交裂隙工况最小和裂隙越多应力波衰减越快的结论,为实际工况中爆破参数的设置提供了理论依据。In order to study the effect of joint cracks on blasting effect in open pit mines,the three numerical models are built using FEM program of LS-DYNA to make the numerical simulation of bench blasting with no crack,parallel crack,blasting source ipsilateral joint fissure with selection of three models of the same location unit.Based on the numerical simulation results and through the stress wave propagation law and analysis of the maximum principal stress,it is concluded that the maximum principal stress of model without crack is the largest,followed by the parallel condition and the least under the joint crack condition as well as more cracks and quicker stress wave decays,which provides the theoretical basis for setting up the parameters of blasting parameters in the actual operating conditions.

关 键 词：节理裂隙 爆破效果 LS-DYNA 最大主应力 数值模拟 

分 类 号：TD235.47[矿业工程—矿井建设]