中部空气间隔装药结构不耦合状态光面爆破效果研究  

Research on Smooth Blasting with Decoupled Explosive Charge in a Mid Column Air Deck System

作　　者：梁瑞[1] 解丽娜 周文海 陈必港 LIANG Rui;XIE Li-na;ZHOU Wen-hai;CHEN Bi-gang(School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, Ganshu, China;Fujian Transportation Science and Technology Research Institute, Fuzhou 350116, Fujian, China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]福建省交通科学技术研究所,福建福州350116

出　　处：《矿冶工程》2019年第1期25-28,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51076061);甘肃省自然基金(B061709);甘肃省自然科学基金(1610RJZA029)

摘　　要：分析了5种中部空气间隔装药不耦合状态的光爆效果,运用ANSYS/LS-DYNA软件针对5种不同的不耦合系数分别建立了5种不同空气柱长度的数值模型,比较相邻周边孔1/2孔距及孔壁所选单元的有效应力时程曲线及有效应力峰值随不耦合系数变化的规律,结果表明,有效应力随轴向不耦合系数增大而减小。从减小炸药段附近单元有效应力以及保证空气柱中部裂缝贯通的角度出发,于本文模型的地质条件下较优的轴向不耦合系数为3.5～4.5。An analysis for smooth blasting with decoupled explosive charges by using an air decking system with 5 different air column lengths was presented. Numerical models with 5 kinds of air column lengths and different decoupling coefficient were established by using ANSYS/ LS.DYNA software. Effective stress vs time curves for the section of neighboring borehole with 1/2 spacing, as well as for the borehole walls were plotted and compared, and the relationship between the effective stress peak and decoupling coefficient was also analyzed. Results showed that the effective stress was decreased with the increasing of axial decoupling coefficient. Based on the consideration of reducing the effective stress near the explosive charge section, as well as for ensuring the blast.induced cracks developed through the middle part of air column, the optimal axial decoupling coefficient for the established model in this paper was determined to be around 3.5~4.5.

关 键 词：光面爆破 空气柱长度 中部空气间隔 不耦合系数 数值模拟 有效应力时程曲线 

分 类 号：TD235[矿业工程—矿井建设]