抵抗线对水下台阶爆破效果影响的模型试验及其数值分析  

Model Test and Numerical Analysis of Resistance Line Influence on Underwater Bench Blasting

作　　者：吴亮[1] 刘琳 余创 周俊汝 WU Liang;LIU Lin;YU Chuang;ZHOU Jun-ru(Engineering Technology Research Center in Intelligent Blasting of Hubei Province,College of Science,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学理学院湖北省智能爆破工程技术研究中心,武汉430065

出　　处：《爆破》2025年第1期56-62,共7页Blasting

基　　金：国家自然科学基金项目(51779193、51979205)。

摘　　要：抵抗线作为爆破设计中的核心参数,与岩石的抛掷距离以及破碎程度都有着密切的关系,从而直接影响破碎效果以及最终的爆堆形状。由于水下爆破工程具有显著的复杂性,影响水下爆破效果的因素错综复杂,因此,探究抵抗线参数对水下台阶爆破的影响规律是必不可少的。通过设置不同抵抗线参数的水下台阶钻爆试验,并采用FLUENT-EDEM耦合方法对抵抗线为2 cm、4 cm、5 cm、6.5 cm四种情况下的爆破试验进行数值模拟,将试验与数值模拟相结合综合评估了抵抗线参数对水下台阶爆破效果的影响。结果表明:抵抗线参数增加初期,用于破碎岩石的有效能量占比增加,且爆破漏斗体积也进一步增大,但随着抵抗线的进一步增加,岩体单位体积所承担的爆炸能量反而降低,另外应力波反射作用强度也减弱了,因此爆破块度的不均匀性呈现出随抵抗线先减小后增大的规律。此外,数值计算能较好地对模型试验的爆破效果进行模拟且结果一致,说明运用FLUENT-EDEM流固耦合方法来探究水下台阶爆破块度破碎问题是切实可行的。The resistance line,as a core parameter in a blast design,is closely related to rock throwing distance and fragmentation degree,thereby directly affecting the fragmentation effectiveness and the final shape of the blast pile.Due to the significant complexity of an underwater blasting project,the factors affecting the effect of underwater blasting are intricate and complex,so it is essential to explore the impact of resistance line parameters on underwater bench blasting law through both drilling and blasting tests and numerical simulations using the FLUENT-EDEM coupling method.Four resistance line cases(2 cm,4 cm,5 cm,and 6.5 cm)were tested.The results indicate that as the resistance line parameter increases,the proportion of adequate energy used for rock fragmentation increases,resulting in a larger blasting funnel volume.However,with further increases in the resistance line,the explosive energy per unit volume of rock decreases,and the stress wave reflection intensity weakens.Consequently,the inhomogeneity of blasting block size first decreases and then increases with the resistance line.Additionally,numerical calculations effectively replicate the model test blasting effects,demonstrating that using the FLUENT-EDEM fluid-solid coupling method to study underwater bench blasting fragmentation is practical and feasible.

关 键 词：水下爆破 流固耦合 FLUENT EDEM 抵抗线 

分 类 号：TD235[矿业工程—矿井建设]